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Di Lenarda L, Buoite Stella A, Ratti C, Ruggiero L, Bernard M, Cavarzerani LP, Canton G, Murena L. Assessing Muscle Mass in the Orthopedic Clinical Setting: Application of the Ultrasound Sarcopenia Index in Elderly Subjects with a Recent Femoral Fracture. Nutrients 2024; 16:711. [PMID: 38474844 PMCID: PMC10934151 DOI: 10.3390/nu16050711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 02/27/2024] [Accepted: 02/28/2024] [Indexed: 03/14/2024] Open
Abstract
BACKGROUND Sarcopenia poses a risk factor for falls, disability, mortality, and unfavorable postoperative outcomes. Recently, the Ultrasound Sarcopenia Index (USI) has been validated to assess muscle mass, and this study aimed to apply the USI in the clinical setting. METHODS This prospective observational study included 108 patients aged >65 years, hospitalized for proximal femoral traumatic fracture. Patients were divided into two groups based on anamnestic data: patients with independent walking (IW) and patients requiring walking aid (WA) before admission. All the participants received an ultrasound examination. Other parameters evaluated were handgrip strength, limb circumferences, nutrition (MNA), and activity of daily living (ADL) scores. RESULTS Fifty-six IW patients (83 ± 6 y; 38 females) and 52 WA patients (87 ± 7 y; 44 females) were recruited. The USI was significantly higher in the IW group compared to the WA group (p = 0.013, Cohen's d = 0.489). Significant correlations were found between the USI and other sarcopenia-associated parameters, such as handgrip strength, MNA, ADLs, other muscle ultrasound parameters, and limb circumferences. CONCLUSION The application of the USI in the orthopedic surgery setting is feasible and might support the diagnosis of sarcopenia when combined with other measures of strength and function.
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Affiliation(s)
- Luca Di Lenarda
- Orthopaedics and Traumatology Unit, Department of Medicine, Surgery and Health Sciences, Azienda Sanitaria Universitaria Giuliano Isontina (ASUGI), Cattinara University Hospital, University of Trieste, Strada di Fiume 447, 34149 Trieste, Italy; (L.D.L.); (C.R.); (L.R.); (M.B.); (G.C.); (L.M.)
| | - Alex Buoite Stella
- Department of Medicine, Surgery and Health Sciences, University of Trieste, Strada di Fiume 447, 34149 Trieste, Italy
- Single-Cycle Master’s Degree Course in Medicine and Surgery, Department of Medicine, Surgery and Health Sciences, University of Trieste, Strada di Fiume 447, 34149 Trieste, Italy;
| | - Chiara Ratti
- Orthopaedics and Traumatology Unit, Department of Medicine, Surgery and Health Sciences, Azienda Sanitaria Universitaria Giuliano Isontina (ASUGI), Cattinara University Hospital, University of Trieste, Strada di Fiume 447, 34149 Trieste, Italy; (L.D.L.); (C.R.); (L.R.); (M.B.); (G.C.); (L.M.)
| | - Luca Ruggiero
- Orthopaedics and Traumatology Unit, Department of Medicine, Surgery and Health Sciences, Azienda Sanitaria Universitaria Giuliano Isontina (ASUGI), Cattinara University Hospital, University of Trieste, Strada di Fiume 447, 34149 Trieste, Italy; (L.D.L.); (C.R.); (L.R.); (M.B.); (G.C.); (L.M.)
| | - Monica Bernard
- Orthopaedics and Traumatology Unit, Department of Medicine, Surgery and Health Sciences, Azienda Sanitaria Universitaria Giuliano Isontina (ASUGI), Cattinara University Hospital, University of Trieste, Strada di Fiume 447, 34149 Trieste, Italy; (L.D.L.); (C.R.); (L.R.); (M.B.); (G.C.); (L.M.)
| | - Luisa Priscamaria Cavarzerani
- Single-Cycle Master’s Degree Course in Medicine and Surgery, Department of Medicine, Surgery and Health Sciences, University of Trieste, Strada di Fiume 447, 34149 Trieste, Italy;
| | - Gianluca Canton
- Orthopaedics and Traumatology Unit, Department of Medicine, Surgery and Health Sciences, Azienda Sanitaria Universitaria Giuliano Isontina (ASUGI), Cattinara University Hospital, University of Trieste, Strada di Fiume 447, 34149 Trieste, Italy; (L.D.L.); (C.R.); (L.R.); (M.B.); (G.C.); (L.M.)
- Department of Medicine, Surgery and Health Sciences, University of Trieste, Strada di Fiume 447, 34149 Trieste, Italy
- Single-Cycle Master’s Degree Course in Medicine and Surgery, Department of Medicine, Surgery and Health Sciences, University of Trieste, Strada di Fiume 447, 34149 Trieste, Italy;
| | - Luigi Murena
- Orthopaedics and Traumatology Unit, Department of Medicine, Surgery and Health Sciences, Azienda Sanitaria Universitaria Giuliano Isontina (ASUGI), Cattinara University Hospital, University of Trieste, Strada di Fiume 447, 34149 Trieste, Italy; (L.D.L.); (C.R.); (L.R.); (M.B.); (G.C.); (L.M.)
- Department of Medicine, Surgery and Health Sciences, University of Trieste, Strada di Fiume 447, 34149 Trieste, Italy
- Single-Cycle Master’s Degree Course in Medicine and Surgery, Department of Medicine, Surgery and Health Sciences, University of Trieste, Strada di Fiume 447, 34149 Trieste, Italy;
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Hinks A, Franchi MV, Power GA. Ultrasonographic measurements of fascicle length overestimate adaptations in serial sarcomere number. Exp Physiol 2023; 108:1308-1324. [PMID: 37608723 PMCID: PMC10988429 DOI: 10.1113/ep091334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 08/07/2023] [Indexed: 08/24/2023]
Abstract
Ultrasound-derived measurements of muscle fascicle length (FL) are often used to infer increases (chronic stretch or training) or decreases (muscle disuse or aging) in serial sarcomere number (SSN). Whether FL adaptations measured via ultrasound can truly approximate SSN adaptations has not been investigated. We casted the right hindlimb of 15 male Sprague-Dawley rats in a dorsiflexed position (i.e., stretched the plantar flexors) for 2 weeks, with the left hindlimb serving as a control. Ultrasound images of the soleus, lateral gastrocnemius (LG), and medial gastrocnemius (MG) were obtained with the ankle at 90° and full dorsiflexion for both hindlimbs pre and post-cast. Following post-cast ultrasound measurements, legs were fixed in formalin with the ankle at 90°, then muscles were dissected and fascicles were teased out for measurement of sarcomere lengths via laser diffraction and calculation of SSN. Ultrasound detected an 11% increase in soleus FL, a 12% decrease in LG FL, and an 8-11% increase in MG FL for proximal fascicles and at full dorsiflexion. These adaptations were partly reflected by SSN adaptations, with a 6% greater soleus SSN in the casted leg than the un-casted leg, but no SSN differences for the gastrocnemii. Weak relationships were observed between ultrasonographic measurements of FL and measurements of FL and SSN from dissected fascicles. Our results showed that ultrasound-derived FL measurements can overestimate an increase in SSN by ∼5%. Future studies should be cautious when concluding a large magnitude of sarcomerogenesis from ultrasound-derived FL measurements, and may consider applying a correction factor. NEW FINDINGS: What is the central question of this study? Measurements of muscle fascicle length via ultrasound are often used to infer changes in serial sarcomere number, such as increases following chronic stretch or resistance training, and decreases with ageing: does ultrasound-derived fascicle length accurately depict adaptations in serial sarcomere number? What is the main finding and its importance? Ultrasound detected an ∼11% increase in soleus fascicle length, but measurements on dissected fascicles showed the actual serial sarcomere number increase was only ∼6%; therefore, measurements of ultrasound-derived fascicle length can overestimate serial sarcomere number adaptations by as much as 5%.
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Affiliation(s)
- Avery Hinks
- Department of Human Health and Nutritional Sciences, College of Biological SciencesUniversity of GuelphGuelphOntarioCanada
| | - Martino V. Franchi
- Department of Biomedical Sciences, Human Neuromuscular Physiology LaboratoryUniversity of PaduaPaduaItaly
- CIR‐MYO Myology CentreUniversity of PaduaPaduaItaly
| | - Geoffrey A. Power
- Department of Human Health and Nutritional Sciences, College of Biological SciencesUniversity of GuelphGuelphOntarioCanada
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Cordeiro LDS, Linhares DG, Barros Dos Santos AO, Lima Dos Santos L, de Castro JBP, Vale RGDS. Influence of resistance training on muscle architecture in older adults: A systematic review and meta-analysis of randomized controlled trials. Arch Gerontol Geriatr 2023; 112:105020. [PMID: 37043838 DOI: 10.1016/j.archger.2023.105020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 03/28/2023] [Accepted: 04/01/2023] [Indexed: 04/14/2023]
Abstract
BACKGROUND Resistance training (RT) consists of planned exercise programs to increase muscle strength capacity through neural and structural adaptations, such as changes in the geometric arrangement of muscle fibers. This study aimed to analyze the influence of RT on muscle architecture in older people. METHODS This PROSPERO-registered systematic review and meta-analysis (identification number CRD42022340477) followed the PRISMA guidelines. Four electronic databases were searched for eligible randomized controlled trials (RCTs) that observed older individuals submitted to RT programs that reported muscle architecture outcomes. RESULTS Seventeen RCTs met the eligibility criteria with a total of 488 participants. The main results of the meta-analysis showed that RT interventions had a significant effect on the thickness of the medial gastrocnemius (SMD = 0.12; 95% CI: - 0.07 to 0.17; p < 0.00001; I2 = 0%). CONCLUSION Based on available evidence, studies included in this review showed improvement in maximum isometric force, pennation angle, fascicle length, thickness, and muscle activation after RT interventions. In turn, the meta-analysis suggested a potential for improving the thickness of the medial gastrocnemius after the intervention. However, any clinical implications drawn from the analyses should be interpreted with caution, as these findings are substantially limited due to a low number of included studies and a potential heterogeneity between studies.
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Affiliation(s)
- Lilliany de Souza Cordeiro
- Postgraduate Program in Exercise and Sport Sciences, Rio de Janeiro State University, Rio de Janeiro, Brazil; Laboratory of Exercise and Sport, Institute of Physical Education and Sports, Rio de Janeiro State University, Rua São Francisco Xavier, 524, Pavilhão João Lira Filho, 9° andar, Bloco F, sala 9134/5, Maracanã, CEP, Rio de Janeiro, RJ CEP 20550-900, Brazil.
| | - Diego Gama Linhares
- Postgraduate Program in Exercise and Sport Sciences, Rio de Janeiro State University, Rio de Janeiro, Brazil; Laboratory of Exercise and Sport, Institute of Physical Education and Sports, Rio de Janeiro State University, Rua São Francisco Xavier, 524, Pavilhão João Lira Filho, 9° andar, Bloco F, sala 9134/5, Maracanã, CEP, Rio de Janeiro, RJ CEP 20550-900, Brazil
| | - Andressa Oliveira Barros Dos Santos
- Postgraduate Program in Exercise and Sport Sciences, Rio de Janeiro State University, Rio de Janeiro, Brazil; Laboratory of Exercise and Sport, Institute of Physical Education and Sports, Rio de Janeiro State University, Rua São Francisco Xavier, 524, Pavilhão João Lira Filho, 9° andar, Bloco F, sala 9134/5, Maracanã, CEP, Rio de Janeiro, RJ CEP 20550-900, Brazil
| | - Luciano Lima Dos Santos
- Postgraduate Program in Exercise and Sport Sciences, Rio de Janeiro State University, Rio de Janeiro, Brazil; Laboratory of Exercise and Sport, Institute of Physical Education and Sports, Rio de Janeiro State University, Rua São Francisco Xavier, 524, Pavilhão João Lira Filho, 9° andar, Bloco F, sala 9134/5, Maracanã, CEP, Rio de Janeiro, RJ CEP 20550-900, Brazil
| | - Juliana Brandão Pinto de Castro
- Postgraduate Program in Exercise and Sport Sciences, Rio de Janeiro State University, Rio de Janeiro, Brazil; Laboratory of Exercise and Sport, Institute of Physical Education and Sports, Rio de Janeiro State University, Rua São Francisco Xavier, 524, Pavilhão João Lira Filho, 9° andar, Bloco F, sala 9134/5, Maracanã, CEP, Rio de Janeiro, RJ CEP 20550-900, Brazil
| | - Rodrigo Gomes de Souza Vale
- Postgraduate Program in Exercise and Sport Sciences, Rio de Janeiro State University, Rio de Janeiro, Brazil; Laboratory of Exercise and Sport, Institute of Physical Education and Sports, Rio de Janeiro State University, Rua São Francisco Xavier, 524, Pavilhão João Lira Filho, 9° andar, Bloco F, sala 9134/5, Maracanã, CEP, Rio de Janeiro, RJ CEP 20550-900, Brazil; Active Aging, Exercise, and Health (HEALTHY-AGE Network), Spain
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Tøien T, Unhjem R, Berg OK, Aagaard P, Wang E. Strength versus endurance trained master athletes: Contrasting neurophysiological adaptations. Exp Gerontol 2023; 171:112038. [PMID: 36442699 DOI: 10.1016/j.exger.2022.112038] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 11/11/2022] [Accepted: 11/21/2022] [Indexed: 11/27/2022]
Abstract
Neural factors play a critical role in the age-related decline in maximal strength and rate of force development (RFD). However, it is uncertain how the age-related attenuation in neuromuscular function may be mitigated in strength or endurance trained master athletes. In this study we applied evoked spinal motoneuron recordings to examine descending motor drive, i.e., efferent drive from supraspinal and spinal centres during maximal voluntary contraction (MVC; V-wave) and H-reflex excitability measured at 10 % MVC in older (>65 yrs) and younger (<35 yrs) strength athletes (n = 21), endurance athletes (n = 17) and untrained control participants (n = 30). Both strength (b = 0.09 [0.01-0.18], p = 0.038) and endurance training (b = 0.14 [0.04-0.23], p = 0.006) were associated with a high V-wave amplitude. This was likely explained by an elevated H-reflex excitability (b = 0.23 [0.11-0.35], p < 0.001) in endurance trained participants, which failed to be seen in strength trained participants. These contrasting neurophysiological properties were accompanied by different physiological traits; strength training was associated with high maximal strength (b = 107.5 [84.6 to 130.4] kg, p < 0.001) and RFD (b = 3171 [2248 to 4094] N‧s-1, p < 0.001), whereas endurance training was associated with elevated maximal oxygen uptake (V̇O2max; b = 13.6 [8.0-19.2] ml‧kg-1‧min-1, p < 0.001). This pattern was apparent irrespective of age, although all traits were negatively associated with advanced age (p < 0.05). In conclusion, strength trained individuals demonstrate higher descending motor drive (elevated V-wave responses), compared to age-matched untrained individuals. Endurance trained individuals also showed elevated V-wave responses, uniquely accompanied by enhanced α-motoneuron excitability and/or reduced pre/postsynaptic inhibition (elevated H-reflex responses). Since a high descending motor drive is a key component of strong muscle contractions, strength training should be emphasized to sustain the ability to carry out force-dependent tasks at older age.
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Affiliation(s)
- Tiril Tøien
- Department of Health and Social Sciences, Molde University College, Norway.
| | - Runar Unhjem
- Faculty of Education and Arts, Nord University, Bodø, Norway
| | - Ole Kristian Berg
- Department of Health and Social Sciences, Molde University College, Norway
| | - Per Aagaard
- Department of Sports Science and Clinical Biomechanics, Research Unit for Muscle Physiology and Biomechanics, University of Southern Denmark, Odense, Denmark
| | - Eivind Wang
- Department of Health and Social Sciences, Molde University College, Norway; Department of Østmarka, Division of Mental Health Care, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
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Tognolo L, Coraci D, Farì G, Vallenari V, Masiero S. Validity of ultrasound rectus femoris quantitative assessment: A comparative study between linear and curved array transducers. Eur J Transl Myol 2022; 32:11040. [PMID: 36533667 PMCID: PMC9830392 DOI: 10.4081/ejtm.2022.11040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 11/28/2022] [Indexed: 12/12/2022] Open
Abstract
Appendicular skeletal mass is commonly used to assess the loss in muscle mass and US represents a valid, and reliable method. However, the procedural protocols are still heterogeneous. The aim of this study was to compare the intertransducers validity of thickness, width, and CSA measurements of RF muscle. The AP, LL and CSA of RF muscle were evaluated with both linear and curve probes in ten healthy subjects and six sarcopenic patients. In the healthy group the mean AP diameters measured with the linear array were significantly higher than those measured with the curved array. AP and CSA were higher in the healthy group compared with the sarcopenic group with both transducers. There was a positive correlation between weight and LL diameter, and a negative correlation between age and muscle AP, measured with the linear probe. Both linear and curved probes represent valid methods in US evaluation of the CSA of the RF muscle. However, in the healthy subjects, the thickness and width of the of the same muscle, are affected by the type of probe.
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Affiliation(s)
- Lucrezia Tognolo
- Department of Neuroscience, Physical Medicine and Rehabilitation, University of Padova, 35128 Padova, Italy,Department of Neuroscience, Physical Medicine and Rehabilitation, University of Padova, Via Giustiniani 2, 35128 Padova, Italy. ORCID ID: 0000-0002-4239-4859
| | - Daniele Coraci
- Department of Neuroscience, Physical Medicine and Rehabilitation, University of Padova, 35128 Padova, Italy
| | - Giacomo Farì
- Department of Translational Biomedicine and Neuroscience, Aldo Moro University, Bari, Italy
| | - Valeria Vallenari
- Department of Neuroscience, Physical Medicine and Rehabilitation, University of Padova, 35128 Padova, Italy
| | - Stefano Masiero
- Department of Neuroscience, Physical Medicine and Rehabilitation, University of Padova, 35128 Padova, Italy
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Jacob I, Johnson MI, Jones G, Jones A, Francis P. Age-related differences of vastus lateralis muscle morphology, contractile properties, upper body grip strength and lower extremity functional capability in healthy adults aged 18 to 70 years. BMC Geriatr 2022; 22:538. [PMID: 35768788 PMCID: PMC9241209 DOI: 10.1186/s12877-022-03183-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 06/01/2022] [Indexed: 11/19/2022] Open
Abstract
Background There is a lack of of cross-sectional research that has investigated muscle morphology, function, and functional capability in all age-bands of healthy adults. The primary aim of this study was to evaluate age-related differences in indices of vastus lateralis (VL) muscle morphology, function and functional capability in a sample of healthy males and females aged 18-70yrs. Secondary aims were to evaluate relationships between age and VL muscle morphology and function and functional capability. Methods B mode Ultrasonography and Tensiomyography were used to measure VL muscle thickness, pennation angle, fascicle length, and contractile properties in 274 healthy adults aged 18-70yrs. Measurements of grip strength and functional capability (1-min chair rise test) were also taken. Data analysis included descriptive statistics, correlations, one-way ANOVAs, and multiple regressions. Results Negative correlations were found between age and muscle thickness (rs = -.56), pennation angle (rs = -.50), fascicle length (rs = -.30), maximal displacement (rs = -.24), grip strength (rs = -.27) and the 1-min chair rise test (rs = -.32). Positive correlations were observed between age and the echo intensity of the muscle (rs = .40) and total contraction time (rs = .20). Differences in the indices of muscle health were noticeable between the 18–29 age band and the 50–59 and 60–70 age bands (p < 0.05). The interaction of age and level of physical activity predicted changes in the variables (r2 = .04—.32). Conclusion Age-related differences in muscle health are noticeable at 50 years of age, and age-related differences are larger in females compared to males. It was suggested that the thickness of the VL changed the most with age across the adult lifespan and that physical activity likely acts to abate detrimental change. Supplementary Information The online version contains supplementary material available at 10.1186/s12877-022-03183-4.
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Affiliation(s)
- Isobel Jacob
- Musculoskeletal Health Research Group, Leeds Beckett University, Leeds, England.
| | - Mark I Johnson
- Centre for Pain Research, Leeds Beckett University, Leeds, England
| | - Gareth Jones
- Musculoskeletal Health Research Group, Leeds Beckett University, Leeds, England
| | - Ashley Jones
- Musculoskeletal Health Research Group, Leeds Beckett University, Leeds, England
| | - Peter Francis
- Musculoskeletal Health Research Group, Leeds Beckett University, Leeds, England.,Department of Science and Health, Institute of Technology Carlow, Carlow, Ireland
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Hinks A, Franchi MV, Power GA. The influence of longitudinal muscle fascicle growth on mechanical function. J Appl Physiol (1985) 2022; 133:87-103. [DOI: 10.1152/japplphysiol.00114.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Skeletal muscle has the remarkable ability to remodel and adapt, such as the increase in serial sarcomere number (SSN) or fascicle length (FL) observed after overstretching a muscle. This type of remodelling is termed longitudinal muscle fascicle growth, and its impact on biomechanical function has been of interest since the 1960s due to its clinical applications in muscle strain injury, muscle spasticity, and sarcopenia. Despite simplified hypotheses on how longitudinal muscle fascicle growth might influence mechanical function, existing literature presents conflicting results partly due to a breadth of methodologies. The purpose of this review is to outline what is currently known about the influence of longitudinal muscle fascicle growth on mechanical function and suggest future directions to address current knowledge gaps and methodological limitations. Various interventions indicate longitudinal muscle fascicle growth can increase the optimal muscle length for active force, but whether the whole force-length relationship widens has been less investigated. Future research should also explore the ability for longitudinal fascicle growth to broaden the torque-angle relationship's plateau region, and the relation to increased force during shortening. Without a concurrent increase in intramuscular collagen, longitudinal muscle fascicle growth also reduces passive tension at long muscle lengths; further research is required to understand whether this translates to increased joint range of motion. Lastly, some evidence suggests longitudinal fascicle growth can increase maximum shortening velocity and peak isotonic power, however, there has yet to be direct assessment of these measures in a neurologically intact model of longitudinal muscle fascicle growth.
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Affiliation(s)
- Avery Hinks
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Martino V. Franchi
- Department of Biomedical Sciences,, University of Padua, Padova, Veneto, Italy
| | - Geoffrey A. Power
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
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Rodrigues R, Daiana Klein K, Dalcero Pompeo K, Aurélio Vaz M. Are There Neuromuscular Differences on Proximal and Distal Joints in Patellofemoral Pain People? A Systematic Review and Meta-Analysis. J Electromyogr Kinesiol 2022; 64:102657. [DOI: 10.1016/j.jelekin.2022.102657] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 02/11/2022] [Accepted: 03/16/2022] [Indexed: 12/26/2022] Open
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The time course of different neuromuscular adaptations to short-term downhill running training and their specific relationships with strength gains. Eur J Appl Physiol 2022; 122:1071-1084. [PMID: 35182181 PMCID: PMC8927009 DOI: 10.1007/s00421-022-04898-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 01/20/2022] [Indexed: 12/24/2022]
Abstract
Purpose Due to its eccentric nature, downhill running (DR) training has been suggested to promote strength gains through neuromuscular adaptations. However, it is unknown whether short-term chronic DR can elicit such adaptations. Methods Twelve untrained, young, healthy adults (5 women, 7 men) took part in 4 weeks’ DR, comprising 10 sessions, with running speed equivalent to 60–65% maximal oxygen uptake (\documentclass[12pt]{minimal}
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\begin{document}$$\dot{V}$$\end{document}V˙O2max, assessed at weeks 0 and 4). Isometric and isokinetic knee-extensor maximal voluntary torque (MVT), vastus lateralis (VL) muscle morphology/architecture (anatomical cross-sectional area, ACSA; physiological CSA, PCSA; volume; fascicle length, Lf; pennation angle, PA) and neuromuscular activation (VL EMG) were assessed at weeks 0, 2 and 4. Results MVT increased by 9.7–15.2% after 4 weeks (p < 0.01). VL EMG during isometric MVT increased by 35.6 ± 46.1% after 4 weeks (p < 0.05) and correlated with changes in isometric MVT after 2 weeks (r = 0.86, p = 0.001). VL ACSA (+2.9 ± 2.7% and +7.1 ± 3.5%) and volume (+2.5 ± 2.5% and +6.6 ± 3.2%) increased after 2 and 4 weeks, respectively (p < 0.05). PCSA (+3.8 ± 3.3%), PA (+5.8 ± 3.8%) and Lf (+2.7 ± 2.2%) increased after 4 weeks (p < 0.01). Changes in VL volume (r = 0.67, p = 0.03) and PCSA (r = 0.71, p = 0.01) correlated with changes in concentric MVT from 2 to 4 weeks. \documentclass[12pt]{minimal}
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\begin{document}$$\dot{V}$$\end{document}V˙O2max (49.4 ± 6.2 vs. 49.7 ± 6.3 mL·kg−1·min−1) did not change after 4 weeks (p = 0.73). Conclusion Just 4 weeks’ moderate-intensity DR promoted neuromuscular adaptations in young, healthy adults, typically observed after high-intensity eccentric resistance training. Neural adaptations appeared to contribute to most of the strength gains at 2 and 4 weeks, while muscle hypertrophy seemed to contribute to MVT changes from 2 to 4 weeks only.
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REJC E, FLOREANI M, VACCARI F, GIOVANELLI N, BOTTER A, GANZINI A, LAZZER S. Effects of underweight-plyometric training on the neuromuscular characteristics in professional rugby players. GAZZETTA MEDICA ITALIANA ARCHIVIO PER LE SCIENZE MEDICHE 2022. [DOI: 10.23736/s0393-3660.20.04546-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Jacob I, Jones G, Francis P, Johnson MI. The effect of limb position on measured values of vastus lateralis muscle morphology using B Mode ultrasound. TRANSLATIONAL SPORTS MEDICINE 2021. [DOI: 10.1002/tsm2.271] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Isobel Jacob
- Musculoskeletal Research Group Leeds Beckett University Leeds UK
| | - Gareth Jones
- Musculoskeletal Research Group Leeds Beckett University Leeds UK
| | - Peter Francis
- Department of Science and Health Institute of Technology Carlow Carlow Ireland
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Impact of Lockdown during COVID-19 Pandemic on Central Activation, Muscle Activity, Contractile Function, and Spasticity in People with Multiple Sclerosis. BIOMED RESEARCH INTERNATIONAL 2021; 2021:2624860. [PMID: 34692828 PMCID: PMC8531768 DOI: 10.1155/2021/2624860] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 09/23/2021] [Accepted: 10/04/2021] [Indexed: 11/24/2022]
Abstract
Background People with multiple sclerosis (MS) suffer from symptoms related to neural control, such as reduced central activation, lower muscle activity, and accentuated spasticity. A forced 9-week home confinement related to COVID-19 in Spain may have worsened these symptoms. However, no study has demonstrated the impact of home confinement on neuromuscular mechanisms in the MS population. This study was aimed at analyzing the effects of a 9-week home confinement on central activation, muscle activity, contractile function, and spasticity in MS patients. Methods Eighteen participants were enrolled in the study. Left and right knee extensor maximum voluntary isometric contraction (MVIC), maximal neural drive via peak surface electromyography (EMG) of the vastus lateralis, central activation ratio (CAR), and muscle contractile function via electrical stimulation of the knee extensor muscles, as well as spasticity using the pendulum test, were measured immediately before and after home confinement. Results Seventeen participants completed the study. CAR significantly decreased after lockdown (ES = 1.271, p < 0.001). Regarding spasticity, there was a trend to decrease in the number of oscillations (ES = 0.511, p = 0.059) and a significant decrease in the duration of oscillations (ES = 0.568, p = 0.038). Furthermore, in the left leg, there was a significant decrease in the first swing excursion (ES = 0.612, p = 0.027) and in the relaxation index (ES = 0.992, p = 0.001). Muscle contractile properties, MVIC, and EMG variables were not modified after confinement. Conclusions The results suggest that a home confinement period of 9 weeks may lead to an increase in lower limb spasticity and a greater deficit in voluntary activation of the knee extensors.
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May S, Locke S, Kingsley M. Reliability of ultrasonographic measurement of muscle architecture of the gastrocnemius medialis and gastrocnemius lateralis. PLoS One 2021; 16:e0258014. [PMID: 34587209 PMCID: PMC8480904 DOI: 10.1371/journal.pone.0258014] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Accepted: 09/15/2021] [Indexed: 11/28/2022] Open
Abstract
Ultrasonography is widely used to measure gastrocnemius muscle architecture; however, it is unclear if values obtained from digitised images are sensitive enough to track architectural responses to clinical interventions. The purpose of this study was to explore the reliability and determine the minimal detectable change (MDC) of gastrocnemius medialis (GM) and gastrocnemius lateralis (GL) muscle architecture using ultrasound in a clinical setting. A trained sonographer obtained three B-mode images from each of the GM and GL muscles in 87 volunteers (44 males, 43 females; 22±9 years of age) on two separate occasions. Three independent investigators received training, then digitised the images to determine intra-rater, inter-rater, and test-retest reliability for fascicle length (FL), pennation angle (θ) and muscle thickness. Median FL, θ, and muscle thickness for GM and GL were 53.6–55.7 mm and 65.8–69.3 mm, 18.7–19.5° and 11.9–12.5°, and 12.8–13.2 mm and 15.9–16.9 mm, respectively. Intra- and inter-rater reliability of manual digitisation was excellent for all parameters. Test-retest reliability was moderate to excellent with intraclass correlation coefficient (ICC) values ≥0.80 for FL, ≥0.61 for θ, and ≥0.81 for muscle thickness, in both GM and GL. The respective MDC for GM and GL FL, θ, and muscle thickness was ≤12.1 mm and ≤18.00 mm, ≤6.4° and ≤4.2°, and ≤3.2 mm and ≤3.1 mm. Although reliable, the relatively large MDC suggest that clinically derived ultrasound measurements of muscle architecture in GM and GL are more likely to be useful to detect differences between populations than to detect changes in muscle architecture following interventions.
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Affiliation(s)
- Samantha May
- La Trobe Rural Health School, La Trobe University, Bendigo, Victoria, Australia
| | - Simon Locke
- La Trobe Rural Health School, La Trobe University, Bendigo, Victoria, Australia
| | - Michael Kingsley
- Holsworth Research Initiative, La Trobe University, Bendigo, Victoria, Australia.,Department of Exercise Sciences, University of Auckland, Auckland, New Zealand
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14
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Ocana PD, Darabseh MZ, Ishihara K, Aburub A, Zambolin F, Montgomery G, Mills R, Scorcelletti M, Cameron J, Ganse B, Degens H, Bagley L. Age-related declines in muscle and respiratory function are proportionate to declines in performance in Master Track Cyclists. Eur J Appl Physiol 2021; 121:3447-3457. [PMID: 34515866 PMCID: PMC8571236 DOI: 10.1007/s00421-021-04803-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 08/25/2021] [Indexed: 11/26/2022]
Abstract
PURPOSE Respiratory and musculoskeletal function decline with age, irrespective of physical activity levels. Previous work has suggested that the age-related rate of decline in function of these two systems might be similar, but it is not known to what extent each system contributes to decreasing performance in ageing master cyclists. Therefore, the purposes of this study are (1) whether the age-related rate of decline in respiratory function, respiratory muscle strength, muscle architecture, muscle function, haemoglobin concentration, haematocrit and performance in master cyclists is uniform and (2) which parameters contribute most to the reduction in performance with age. METHODS Master cyclists were recruited during the Track Cycling Masters World Championship 2019 in Manchester. Respiratory function and respiratory muscle strength were determined using spirometry and a mouth pressure device, respectively. Muscle architecture was determined using ultrasonography, and muscle function by countermovement jump. RESULTS Forced expiratory volume in the first second, forced vital capacity, fascicle length, muscle thickness, take-off velocity, jump power, jump power per body mass, handgrip strength, haemoglobin concentration and performance correlated negatively with age (p ≤ 0.043). The age-related rate of decline did not differ significantly between parameters (p = 0.124), but it was slower for haemoglobin concentration (p = 0.041). Take-off velocity was the major determinant of performance in 200, 500 and 2000 m track cycling disciplines (R2adj = 0.675, 0.786 and 0.769, respectively; p < 0.001). CONCLUSION Age-related decline in respiratory and muscle system is accompanied by a similar rate of decline in performance. The major contribution to the age-related decline of performance is reduced muscle function, specifically take-off velocity.
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Affiliation(s)
- Pablo Duro Ocana
- Department of Life Sciences, Centre of Musculoskeletal Sciences and Sport Medicine, Manchester Metropolitan University, John Dalton Building; Chester Street, Manchester, M1 5GD, UK.
| | - Mohammad Z Darabseh
- Department of Life Sciences, Centre of Musculoskeletal Sciences and Sport Medicine, Manchester Metropolitan University, John Dalton Building; Chester Street, Manchester, M1 5GD, UK
| | - Kengo Ishihara
- Department of Life Sciences, Centre of Musculoskeletal Sciences and Sport Medicine, Manchester Metropolitan University, John Dalton Building; Chester Street, Manchester, M1 5GD, UK
- Department of Food Sciences and Human Nutrition, Faculty of Agriculture, Ryukoku University, Shiga, 520-2194, Japan
| | - Aseel Aburub
- School of Allied Health Professions, Keele University, Staffordshire, ST5 5BG, UK
| | - Fabio Zambolin
- Department of Sport and Exercise Sciences, Centre of Musculoskeletal Sciences and Sport Medicine, Manchester Metropolitan University, All Saints Building; Oxford Rd, Manchester, M15 6BW, UK
| | - Gallin Montgomery
- Department of Sport and Exercise Sciences, Centre of Musculoskeletal Sciences and Sport Medicine, Manchester Metropolitan University, All Saints Building; Oxford Rd, Manchester, M15 6BW, UK
| | - Richard Mills
- Department of Sport and Exercise Sciences, Centre of Musculoskeletal Sciences and Sport Medicine, Manchester Metropolitan University, All Saints Building; Oxford Rd, Manchester, M15 6BW, UK
| | - Matteo Scorcelletti
- Department of Life Sciences, Centre of Musculoskeletal Sciences and Sport Medicine, Manchester Metropolitan University, John Dalton Building; Chester Street, Manchester, M1 5GD, UK
| | - James Cameron
- Department of Health Professions, Manchester Metropolitan University, Cavendish Building; Cavendish Street, Manchester, M1 6BG, UK
| | - Bergita Ganse
- Department of Surgery, Innovative Implant Development, Saarland University, Kirrberger Str. 1, 66421, Homburg, Germany
| | - Hans Degens
- Department of Life Sciences, Centre of Musculoskeletal Sciences and Sport Medicine, Manchester Metropolitan University, John Dalton Building; Chester Street, Manchester, M1 5GD, UK
- Institute of Sport Science and Innovations, Lithuanian Sports University, Kaunas, Lithuania
| | - Liam Bagley
- Department of Life Sciences, Centre of Musculoskeletal Sciences and Sport Medicine, Manchester Metropolitan University, John Dalton Building; Chester Street, Manchester, M1 5GD, UK
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15
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Reeves J, Jones R, Liu A, Bent L, Martinez-Santos A, Nester C. No change in foot soft tissue morphology and skin sensitivity after three months of using foot orthoses that alter plantar pressure. FOOTWEAR SCIENCE 2021. [DOI: 10.1080/19424280.2021.1961880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Joanna Reeves
- School of Health Sciences, University of Salford, Salford, United Kingdom
- School of Sport, Health and Exercise Science, University of Portsmouth, Portsmouth, United Kingdom
| | - Richard Jones
- School of Health Sciences, University of Salford, Salford, United Kingdom
| | - Anmin Liu
- School of Health Sciences, University of Salford, Salford, United Kingdom
| | - Leah Bent
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Canada
| | | | - Christopher Nester
- School of Health Sciences, University of Salford, Salford, United Kingdom
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16
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Quinlan JI, Franchi MV, Gharahdaghi N, Badiali F, Francis S, Hale A, Phillips BE, Szewczyk N, Greenhaff PL, Smith K, Maganaris C, Atherton PJ, Narici MV. Muscle and tendon adaptations to moderate load eccentric vs. concentric resistance exercise in young and older males. GeroScience 2021; 43:1567-1584. [PMID: 34196903 PMCID: PMC8492846 DOI: 10.1007/s11357-021-00396-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 05/27/2021] [Indexed: 02/07/2023] Open
Abstract
Resistance exercise training (RET) is well-known to counteract negative age-related changes in both muscle and tendon tissue. Traditional RET consists of both concentric (CON) and eccentric (ECC) contractions; nevertheless, isolated ECC contractions are metabolically less demanding and, thus, may be more suitable for older populations. However, whether submaximal (60% 1RM) CON or ECC contractions differ in their effectiveness is relatively unknown. Further, whether the time course of muscle and tendon adaptations differs to the above is also unknown. Therefore, this study aimed to establish the time course of muscle and tendon adaptations to submaximal CON and ECC RET. Twenty healthy young (24.5 ± 5.1 years) and 17 older males (68.1 ± 2.4 years) were randomly allocated to either isolated CON or ECC RET which took place 3/week for 8 weeks. Tendon biomechanical properties, muscle architecture and maximal voluntary contraction were assessed every 2 weeks and quadriceps muscle volume every 4 weeks. Positive changes in tendon Young's modulus were observed after 4 weeks in all groups after which adaptations in young males plateaued but continued to increase in older males, suggesting a dampened rate of adaptation with age. However, both CON and ECC resulted in similar overall changes in tendon Young's modulus, in all groups. Muscle hypertrophy and strength increases were similar between CON and ECC in all groups. However, pennation angle increases were greater in CON, and fascicle length changes were greater in ECC. Notably, muscle and tendon adaptations appeared to occur in synergy, presumably to maintain the efficacy of the muscle-tendon unit.
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Affiliation(s)
- Jonathan Iain Quinlan
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, UK.,National Institute for Health Research, Birmingham Biomedical Research Centre At University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK.,MRC Versus Arthritis Centre for Musculoskeletal Ageing Research and NIHR Nottingham Biomedical Research Centre, University of Nottingham's Royal Derby Hospital Centre, Nottingham, UK
| | - Martino Vladimiro Franchi
- MRC Versus Arthritis Centre for Musculoskeletal Ageing Research and NIHR Nottingham Biomedical Research Centre, University of Nottingham's Royal Derby Hospital Centre, Nottingham, UK.,Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Nima Gharahdaghi
- MRC Versus Arthritis Centre for Musculoskeletal Ageing Research and NIHR Nottingham Biomedical Research Centre, University of Nottingham's Royal Derby Hospital Centre, Nottingham, UK
| | - Francesca Badiali
- MRC Versus Arthritis Centre for Musculoskeletal Ageing Research and NIHR Nottingham Biomedical Research Centre, University of Nottingham's Royal Derby Hospital Centre, Nottingham, UK
| | - Susan Francis
- Sir Peter Mansfield Magnetic Resonance Centre, School of Physics and Astronomy, University of Nottingham, Nottingham, UK
| | - Andrew Hale
- Sir Peter Mansfield Magnetic Resonance Centre, School of Physics and Astronomy, University of Nottingham, Nottingham, UK
| | - Bethan Eileen Phillips
- MRC Versus Arthritis Centre for Musculoskeletal Ageing Research and NIHR Nottingham Biomedical Research Centre, University of Nottingham's Royal Derby Hospital Centre, Nottingham, UK
| | - Nathaniel Szewczyk
- MRC Versus Arthritis Centre for Musculoskeletal Ageing Research and NIHR Nottingham Biomedical Research Centre, University of Nottingham's Royal Derby Hospital Centre, Nottingham, UK.,Ohio Musculoskeletal and Neurological Institute (OMNI) and Department of Biomedical Sciences, Ohio University, Athens, OH, 43147, USA
| | - Paul Leonard Greenhaff
- MRC Versus Arthritis Centre for Musculoskeletal Ageing Research and NIHR Nottingham Biomedical Research Centre, University of Nottingham's Royal Derby Hospital Centre, Nottingham, UK
| | - Kenneth Smith
- MRC Versus Arthritis Centre for Musculoskeletal Ageing Research and NIHR Nottingham Biomedical Research Centre, University of Nottingham's Royal Derby Hospital Centre, Nottingham, UK
| | | | - Phillip James Atherton
- MRC Versus Arthritis Centre for Musculoskeletal Ageing Research and NIHR Nottingham Biomedical Research Centre, University of Nottingham's Royal Derby Hospital Centre, Nottingham, UK
| | - Marco Vincenzo Narici
- MRC Versus Arthritis Centre for Musculoskeletal Ageing Research and NIHR Nottingham Biomedical Research Centre, University of Nottingham's Royal Derby Hospital Centre, Nottingham, UK. .,Department of Biomedical Sciences, University of Padova, Padova, Italy. .,CIR-MYO Myology Center, University of Padova, Padova, Italy.
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17
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Narici M, McPhee J, Conte M, Franchi MV, Mitchell K, Tagliaferri S, Monti E, Marcolin G, Atherton PJ, Smith K, Phillips B, Lund J, Franceschi C, Maggio M, Butler‐Browne GS. Age-related alterations in muscle architecture are a signature of sarcopenia: the ultrasound sarcopenia index. J Cachexia Sarcopenia Muscle 2021; 12:973-982. [PMID: 34060717 PMCID: PMC8350200 DOI: 10.1002/jcsm.12720] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 03/23/2021] [Accepted: 05/03/2021] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND The assessment of muscle mass is a key determinant of the diagnosis of sarcopenia. We introduce for the first time an ultrasound imaging method for diagnosing sarcopenia based on changes in muscle geometric proportions. METHODS Vastus lateralis muscle fascicle length (Lf) and thickness (Tm) were measured at 35% distal femur length by ultrasonography in a population of 279 individuals classified as moderately active elderly (MAE), sedentary elderly (SE) (n = 109), mobility impaired elderly (MIE) (n = 43), and in adult young controls (YC) (n = 60). The ratio of Lf/Tm was calculated to obtain an ultrasound index of the loss of muscle mass associated with sarcopenia (USI). In a subsample of elderly male individuals (n = 76) in which corresponding DXA measurements were available (MAE, n = 52 and SE, n = 24), DXA-derived skeletal muscle index (SMI, appendicular limb mass/height2 ) was compared with corresponding USI values. RESULTS For both young and older participants, USI values were found to be independent of sex, height and body mass. USI values were 3.70 ± 0.52 for YC, 4.50 ± 0.72 for the MAE, 5.05 ± 1.11 for the SE and 6.31 ± 1.38 for the MIE, all significantly different between each other (P < 0.0001). Based on the USI Z-scores, with reference to the YC population, the 219 elderly participants were stratified according to their muscle sarcopenic status. Individuals with USI values within a range of 3.70 < USI ≥ 4.23 were classified as non-sarcopenic (prevalence 23.7%), those with USI values within 4.23 < USI ≥ 4.76 were classified as pre-sarcopenic (prevalence 23.7%), those with USI values within 4.76 < USI ≥ 5.29 were classified as moderately sarcopenic (prevalence 15.1%), those with USI values within range 5.29 < USI ≥ 5.82 were classified as sarcopenic (prevalence 27.9%), and those with USI values >5.82 were classified as severely sarcopenic (prevalence 9.6%). The DXA-derived SMI was found to be significantly correlated with USI (r = 0.61, P < 0.0001). Notably, the USI cut-off value for moderate sarcopenia (4.76 a.u.) was found to coincide with the DXA cut-off value of sarcopenia (7.26 kg/m2 ). CONCLUSIONS We propose a novel, practical, and inexpensive imaging marker of the loss of muscle mass associated with sarcopenia, called the ultrasound sarcopenic index (USI), based on changes in muscle geometric proportions. These changes provide a useful 'signature of sarcopenia' and allow the stratification of individuals according to the presence and severity of muscle sarcopenia. We are convinced that the USI will be a useful clinical tool for confirming the diagnosis of sarcopenia, of which the assessment of muscle mass is a key-component.
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Affiliation(s)
- Marco Narici
- Department of Biomedical SciencesUniversity of PadovaPadovaItaly
- CIR‐MYO Myology CenterUniversity of PaduaPaduaItaly
| | - Jamie McPhee
- Department of Sport and Exercise SciencesManchester Metropolitan UniversityManchesterUK
| | - Maria Conte
- Department of Experimental, Diagnostic and Specialty MedicineUniversity of BolognaBolognaItaly
| | | | - Kyle Mitchell
- Dorsey County Hospital NHS Foundation TrustDorchesterUK
| | | | - Elena Monti
- Department of Biomedical SciencesUniversity of PadovaPadovaItaly
| | | | - Philip J. Atherton
- MRC/Versus Arthritis Centre for Musculoskeletal Ageing Research and National Institute for Health Research Nottingham Biomedical Research CentreUniversity of NottinghamDerbyUK
| | - Kenneth Smith
- MRC/Versus Arthritis Centre for Musculoskeletal Ageing Research and National Institute for Health Research Nottingham Biomedical Research CentreUniversity of NottinghamDerbyUK
| | - Bethan Phillips
- MRC/Versus Arthritis Centre for Musculoskeletal Ageing Research and National Institute for Health Research Nottingham Biomedical Research CentreUniversity of NottinghamDerbyUK
| | - Jonathan Lund
- Department of Surgery and University of Nottingham School of MedicineRoyal Derby HospitalDerbyUK
| | - Claudio Franceschi
- Department of Experimental, Diagnostic and Specialty MedicineUniversity of BolognaBolognaItaly
| | - Marcello Maggio
- Department of Internal Medicine and Biomedical Sciences, Section of GeriatricsUniversity of ParmaParmaItaly
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18
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Pallarés JG, Hernández-Belmonte A, Martínez-Cava A, Vetrovsky T, Steffl M, Courel-Ibáñez J. Effects of range of motion on resistance training adaptations: A systematic review and meta-analysis. Scand J Med Sci Sports 2021; 31:1866-1881. [PMID: 34170576 DOI: 10.1111/sms.14006] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Accepted: 05/20/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND Nowadays, there is a lack of consensus and high controversy about the most effective range of motion (ROM) to minimize the risk of injury and maximize the resistance training adaptations. OBJECTIVE To conduct a systematic review and meta-analysis of the scientific evidence examining the effects of full and partial ROM resistance training interventions on neuromuscular, functional, and structural adaptations. METHODS The original protocol (CRD42020160976) was prospectively registered in the PROSPERO database. Medline, Scopus, and Web of Science databases were searched to identify relevant articles from the earliest record up to and including March 2021. The RoB 2 and GRADE tools were used to judge the level of bias and quality of evidence. Meta-analyses were performed using robust variance estimation with small-sample corrections. RESULTS Sixteen studies were finally included in the systematic review and meta-analyses. Full ROM training produced significantly greater adaptations than partial ROM on muscle strength (ES = 0.56, p = 0.004) and lower-limb hypertrophy (ES = 0.88, p = 0.027). Furthermore, although not statistically significant, changes in functional performance were maximized by the full ROM training (ES = 0.44, p = 0.186). Finally, no significant superiority of either ROM was found to produce changes in muscle thickness, pennation angle, and fascicle length (ES = 0.28, p = 0.226). CONCLUSION Full ROM resistance training is more effective than partial ROM to maximize muscle strength and lower-limb muscle hypertrophy. Likewise, functional performance appears to be favored by the use of full ROM exercises. On the contrary, there are no large differences between the full and partial ROM interventions to generate changes in muscle architecture.
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Affiliation(s)
- Jesús G Pallarés
- Human Performance and Sports Science Laboratory, Faculty of Sport Sciences, University of Murcia, Murcia, Spain
| | | | - Alejandro Martínez-Cava
- Human Performance and Sports Science Laboratory, Faculty of Sport Sciences, University of Murcia, Murcia, Spain
| | - Tomas Vetrovsky
- Faculty of Physical Education and Sport, Charles University, Prague, Czech Republic
| | - Michal Steffl
- Faculty of Physical Education and Sport, Charles University, Prague, Czech Republic
| | - Javier Courel-Ibáñez
- Human Performance and Sports Science Laboratory, Faculty of Sport Sciences, University of Murcia, Murcia, Spain
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19
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Monti E, Toniolo L, Marcucci L, Bondì M, Martellato I, Šimunič B, Toninello P, Franchi MV, Narici MV, Reggiani C. Are muscle fibres of body builders intrinsically weaker? A comparison with single fibres of aged-matched controls. Acta Physiol (Oxf) 2021; 231:e13557. [PMID: 32921001 DOI: 10.1111/apha.13557] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 08/21/2020] [Accepted: 09/03/2020] [Indexed: 12/17/2022]
Abstract
AIM Skeletal muscles of Body Builders (BB) represent an interesting model to study muscle mass gains in response to high volume resistance training. It is debated whether muscle contractile performance improves in proportion to mass. Here, we aim to assess whether muscle hypertrophy does not occur at the expense of performance. METHODS Six BB and Six untrained controls (CTRL) were recruited. Cross-sectional area (CSA) and maximum voluntary contraction (MVC) of quadriceps femoris muscle (QF) and CSA and architecture of vastus lateralis (VL) were determined. Moreover, a biopsy was taken from VL mid-portion and single fibres were analysed. RESULTS QF CSA and MVC were 32% (n.s., P = .052) and 58% (P = .009) higher in BB than in CTRL, respectively. VL CSA was 37% higher in BB (P = .030). Fast 2A fibres CSA was 24% (P = .048) greater in BB than in CTRL, when determined in immunostained sections of biopsy samples. Single permeabilized fast fibres CSA was 37% (n.s., P = .052) higher in BB than in CTRL, and their force was slightly higher in BB (n.s.), while specific tension (P0 ) was 19% (P = .024) lower. The lower P0 was not explained either by lower myosin content or by impaired calcium diffusion. Conversely, the swelling caused by skinning-induced permeabilization was different and, when used to correct P0 , differences between populations disappeared. CONCLUSIONS The results show that high degree of muscle hypertrophy is not detrimental for force generation capacity, as increases in fibre size and force are strictly proportional once the differential swelling response is accounted for.
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Affiliation(s)
- Elena Monti
- Department of Biomedical Sciences University of Padova Padova Italy
| | - Luana Toniolo
- Department of Biomedical Sciences University of Padova Padova Italy
| | - Lorenzo Marcucci
- Department of Biomedical Sciences University of Padova Padova Italy
| | - Michela Bondì
- Department of Biomedical Sciences University of Padova Padova Italy
| | - Ivan Martellato
- Department of Biomedical Sciences University of Padova Padova Italy
| | - Bostjan Šimunič
- Science and Research Centre Koper Institute for Kinesiology Research Koper Slovenia
| | - Paolo Toninello
- Clinic of Plastic Surgery Padova University Hospital Padova Italy
| | | | - Marco V. Narici
- Department of Biomedical Sciences University of Padova Padova Italy
- Science and Research Centre Koper Institute for Kinesiology Research Koper Slovenia
- CIR‐MYO Myology Centre Department of Biomedical Sciences University of Padua Padova Italy
| | - Carlo Reggiani
- Department of Biomedical Sciences University of Padova Padova Italy
- Science and Research Centre Koper Institute for Kinesiology Research Koper Slovenia
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20
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The mechanisms of adaptation for muscle fascicle length changes with exercise: Implications for spastic muscle. Med Hypotheses 2020; 144:110199. [PMID: 33254508 DOI: 10.1016/j.mehy.2020.110199] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 08/10/2020] [Accepted: 08/15/2020] [Indexed: 11/23/2022]
Abstract
We are proposing optimal training conditions that can lead to an increase in the number of serial sarcomeres (SSN) and muscle fascicle length (FL) in spastic muscles. Therapeutic interventions for increasing FL in clinical populations with neurological origin, in whom relative shortness of muscle fascicles contributed to the presentation of symptoms such as spasticity, contracture, and limited functional abilities, do not generally meet these conditions, and therefore, result in less than satisfactory outcomes. Based on a review of literature, we argue that protocols of exercise interventions that led to sarcomerogenesis, and increases in SSN and FL in healthy animal and human models satisfied three criteria: 1) all involved eccentric exercise at appropriately high velocity; 2) resulted in positive strain of muscle fascicles; and 3) momentary deactivation in the stretched muscle. Accordingly, to increase FL in spastic muscles, new exercise protocols in which the three presumed criteria are satisfied, must be developed, and long-term muscle architectural and functional adaptations to such trainings must be examined.
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21
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Reggiani C, Schiaffino S. Muscle hypertrophy and muscle strength: dependent or independent variables? A provocative review. Eur J Transl Myol 2020; 30:9311. [PMID: 33117512 PMCID: PMC7582410 DOI: 10.4081/ejtm.2020.9311] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 08/23/2020] [Indexed: 01/02/2023] Open
Abstract
The question whether the muscle hypertrophy induced by resistance training, hormone administration or genetic manipulation is accompanied by a proportional increase in muscle strength is still open. This review summarizes and analyses data obtained in human and rodent muscles in studies that have monitored in parallel changes in muscle size and changes in muscle force, measured in isometric contractions in vivo, in isolated muscles ex vivo (in rodents) and in single muscle fibers. Although a general positive relation exists among the two variables, a number of studies show a clear dissociation with increase of muscle size with no change or even decrease in strength and, vice versa, increase in strength without increase in size. The possible mechanisms of such dissociation, which involves neural motor control and/or cellular and molecular adaptations of muscle fibers, are briefly discussed.
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Affiliation(s)
- Carlo Reggiani
- Department of Biomedical Sciences of the University of Padova, Padova, Italy.,Science and Research Centre Koper, Institute for Kinesiology Research, Koper, Slovenia
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22
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Muscle Hypertrophy and Architectural Changes in Response to Eight-Week Neuromuscular Electrical Stimulation Training in Healthy Older People. Life (Basel) 2020; 10:life10090184. [PMID: 32911678 PMCID: PMC7554879 DOI: 10.3390/life10090184] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 09/03/2020] [Accepted: 09/04/2020] [Indexed: 12/25/2022] Open
Abstract
Loss of muscle mass of the lower limbs and of the spine extensors markedly impairs locomotor ability and spine stability in old age. In this study, we investigated whether 8 w of neuromuscular electrical stimulation (NMES) improves size and architecture of the lumbar multifidus (LM) and vastus lateralis (VL) along with locomotor ability in healthy older individuals. Eight volunteers (aged 65 ≥ years) performed NMES 3 times/week. Eight sex- and age-matched individuals served as controls. Functional tests (Timed Up and Go test (TUG) and Five Times Sit-to-Stand Test (FTSST)), VL muscle architecture (muscle thickness (MT), pennation angle (PA), and fiber length (FL)), along with VL cross-sectional area (CSA) and both sides of LM were measured before and after by ultrasound. By the end of the training period, MT and CSA of VL increased by 8.6% and 11.4%, respectively. No significant increases were observed in FL and PA. LM CSA increased by 5.6% (left) and 7.1% (right). Interestingly, all VL architectural parameters significantly decreased in the control group. The combined NMES had a large significant effect on TUG (r = 0.50, p = 0.046). These results extend previous findings on the hypertrophic effects of NMES training, suggesting to be a useful mean for combating age-related sarcopenia.
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Monti E, Franchi MV, Badiali F, Quinlan JI, Longo S, Narici MV. The Time-Course of Changes in Muscle Mass, Architecture and Power During 6 Weeks of Plyometric Training. Front Physiol 2020; 11:946. [PMID: 32848873 PMCID: PMC7417646 DOI: 10.3389/fphys.2020.00946] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 07/14/2020] [Indexed: 12/23/2022] Open
Abstract
Purpose To investigate the time-course of changes in knee-extensors muscle mass, architecture and function in response to plyometric training (PLT) performed on a novel training device, the Tramp-Trainer. This machine consists in a trampoline connected to an inclined sledge which allows the performance of repeated jumps while the subject is sitting on a chair. Methods Eight healthy males (173.6 ± 4.7 cm, 69.7 ± 13.5 kg, 25.3 ± 4.6 years) underwent 6 weeks of bilateral PLT on the tramp-trainer machine. Training was performed three times per week (between 120 and 150 bounces per session). Knee-extensor maximum voluntary torque (MVT) and power, quadriceps femoris (QF) volume (VOL), cross-sectional area from the 20% to the 60% of femur length and CSAmean, together with vastus lateralis (VL) architecture (fascicle length, Lf, and pennation angle, PA) were assessed after 2, 4, and 6 weeks of PLT. Results All results are presented as changes versus baseline values. MVT increased by 17.8% (week 2, p < 0.001) and 22.2% (week 4, p < 0.01), respectively, and declined to 13.3% (p < 0.05) at week 6 of PLT. Power increased by 18.2% (week 4, p < 0.05) and 19.7% (week 6, p < 0.05). QF VOL increased by 4.7% (week 4, p < 0.05) and 5.8% (week 6, p < 0.01); VL VOL increased by 5.2%, (p < 0.05), 8.2%, (p < 0.01), and 9.6% (p < 0.05) at weeks 2, 4, and 6, respectively. An increase in Lf was detected already at wk 2 (2.2%, p < 0.05), with further increase at 4 and 6 weeks of PLT (4 and 4.4%, respectively, p < 0.01). PA increased by 5.8% (p < 0.05) at week 6. Significant positive correlations were found between CSAmean and Power (R2 = 0.46, p < 0.001) and between QF VOL and Power (R2 = 0.44, p < 0.024). Conclusions PLT induced rapid increases in muscle volume, fascicle length, pennation angle, torque and power in healthy younger adults. Notably, changes in VL VOL and Lf were detectable already after 2 weeks, followed by increases in knee extensors VOL and power from week 4 of PLT. Since the increase in CSAmean and QF VOL cannot fully explain the increment in muscle power, it is likely that other factors (such as adaptations in neural drive or tendon mechanical properties) may have contributed to such fucntional changes.
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Affiliation(s)
- Elena Monti
- Institute of Physiology, Department of Biomedical Sciences, University of Padua, Padua, Italy.,MRC-ARUK Centre for Musculoskeletal Ageing, University of Nottingham, Derby, United Kingdom
| | - Martino V Franchi
- Institute of Physiology, Department of Biomedical Sciences, University of Padua, Padua, Italy.,MRC-ARUK Centre for Musculoskeletal Ageing, University of Nottingham, Derby, United Kingdom
| | - Francesca Badiali
- MRC-ARUK Centre for Musculoskeletal Ageing, University of Nottingham, Derby, United Kingdom
| | - Jonathan I Quinlan
- MRC-ARUK Centre for Musculoskeletal Ageing, University of Nottingham, Derby, United Kingdom.,School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, United Kingdom.,NIHR Birmingham Biomedical Research Centre, University Hospitals Birmingham, NHS Foundation Trust and University of Birmingham, Birmingham, United Kingdom
| | - Stefano Longo
- MRC-ARUK Centre for Musculoskeletal Ageing, University of Nottingham, Derby, United Kingdom.,Department of Biomedical Sciences for Health, University of Milan, Milan, Italy
| | - Marco V Narici
- Institute of Physiology, Department of Biomedical Sciences, University of Padua, Padua, Italy.,MRC-ARUK Centre for Musculoskeletal Ageing, University of Nottingham, Derby, United Kingdom.,CIR-Myo Myology Centre, Department of Biomedical Sciences, University of Padua, Padua, Italy
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Nóbrega SR, Chachá SGF, Libardi CA. Resistance training combined with blood flow restriction in cirrhosis: study protocol for a randomized controlled trial. Trials 2020; 21:446. [PMID: 32471480 PMCID: PMC7257225 DOI: 10.1186/s13063-020-04410-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 05/14/2020] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Patients affected by hepatic cirrhosis show reductions in muscle mass and function, with poor quality of life and functional performance. As such, resistance training with blood flow restriction (BFR-RT) could be a useful therapeutic tool for health promotion. Thus, we aim to verify the effects of this intervention on muscle strength, muscle mass, fiber Pennation angle, fascicle length, functional performance, quality of life, and fall risk scores in this population. METHODS Thirty participants will be randomly distributed between 1) BFR-RT and 2) control (CTRL). Assessments will occur at three time points: before the training intervention (0 W), after 12 weeks (12 W), and at follow-up (24 W). The following variables will be assessed: Child-Pugh classification; MELD score; SF-36 questionnaire; fatigue severity index; 6-min walk test; timed-up and go; 30-s sitting and rising test; dietary record; one-repetition maximum (1-RM) strength test (knee extension exercise); and vastus lateralis' cross-sectional area, Pennation angle, and fascicle length. The BFR-RT group will undergo 12 weeks of knee extension exercise (1 × 30 repetitions and 3 × 15 repetitions at 20% 1-RM and 50% of total blood flow occlusion pressure), with two sessions per week. Data normality will be assessed using the Shapiro-Wilk test. In case of normal distribution, a one-way repeated measures analysis of variance will be implemented to test for differences in baseline values. A mixed model then will be applied for each dependent variable. In case of non-normal data distribution, a Kruskal-Wallis test will be implemented to test for differences in baseline values. Next, the Friedman test will be used to analyze repeated measures. Within- and between-group effect sizes will be calculated using Cohen's d for each outcome. Finally, the minimal clinically important difference will be analyzed with distribution-based methods. DISCUSSION To our knowledge, this will be the first trial to investigate BFR-RT in patients with cirrhosis and evaluate the effects on neuromuscular parameters, functional performance, disease severity, and quality of life outcomes. TRIAL REGISTRATION Brazilian Clinical Trials Registry (ReBec): RBR-395mfw. Registered on 25 August 2018.
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Affiliation(s)
- Sanmy Rocha Nóbrega
- MUSCULAB - Laboratory of Neuromuscular Adaptations to Resistance Training, Federal University of São Carlos - UFSCar, Rod. Washington Luiz, km 235 - SP 310, São Carlos, SP, CEP 13565-905, Brazil
| | - Silvana Gama Florencio Chachá
- Department of Medicine, Federal University of São Carlos - UFSCar, Rod. Washington Luiz, km 235 - SP 310, São Carlos, SP, CEP 13565-905, Brazil
| | - Cleiton Augusto Libardi
- MUSCULAB - Laboratory of Neuromuscular Adaptations to Resistance Training, Federal University of São Carlos - UFSCar, Rod. Washington Luiz, km 235 - SP 310, São Carlos, SP, CEP 13565-905, Brazil.
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25
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Blum D, Rodrigues R, Geremia JM, Brenol CV, Vaz MA, Xavier RM. Quadriceps muscle properties in rheumatoid arthritis: insights about muscle morphology, activation and functional capacity. Adv Rheumatol 2020; 60:28. [PMID: 32429993 DOI: 10.1186/s42358-020-00132-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 04/30/2020] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Rheumatoid arthritis (RA) is an inflammatory and chronic autoimmune disease that leads to muscle mass loss and functional capacity impairment, potentiated by physical inactivity. Despite evidences demonstrate neuromuscular impairments in RA patients, aging effects may have masked the results of similar previous studies. The aim of study was to verify (i) the effects of RA on functional capacity and muscle properties in middle-aged patients and (ii) the association between age, clinical characteristics, quadriceps muscle properties and functional capacity. METHODS Thirty-five RA women and 35 healthy age-matched women were compared with the following outcomes: (i) physical activity level through the International Physical Activity Questionnaire (IPAQ); (ii) timed-up and go (TUG) test; (iii) isometric knee extensor muscular strength; and (iv) vastus lateralis muscle activation and muscle architecture (muscle thickness, pennation angle and fascicle length) during an isometric test. An independent Student t-test and partial correlation (controlled by physical activity levels) were performed, with p < 0.05. RESULTS Compared with healthy women, RA presented (i) lower physical activity level (- 29.4%; p < 0.001); (ii) lower isometric knee extensor strength (- 20.5%; p < 0.001); (iii) lower TUG performance (- 21.7%; p < 0.001); (iv) smaller muscle thickness (- 23.3%; p < 0.001) and pennation angle (- 14.1%; p = 0.011). No differences were observed in muscle activation and fascicle length. Finally, the correlation demonstrated that, with exception of TUG, muscle strength and muscle morphology were not associated with age in RA, differently from healthy participants. CONCLUSION Middle-aged RA patients' impairments occurred due to the disease independently of the aging process, except for functional capacity. Physical inactivity may have potentiated these losses.
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Affiliation(s)
- Denise Blum
- Serviço de Reumatologia, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Rodrigo Rodrigues
- Laboratório de Pesquisa do Exercício, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil. .,Centro Universitário da Serra Gaúcha, Caxias do Sul, Brazil.
| | - Jeam Marcel Geremia
- Laboratório de Pesquisa do Exercício, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Claiton Viegas Brenol
- Serviço de Reumatologia, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Marco Aurélio Vaz
- Laboratório de Pesquisa do Exercício, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Ricardo Machado Xavier
- Serviço de Reumatologia, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
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Gérard R, Gojon L, Decleve P, Van Cant J. The Effects of Eccentric Training on Biceps Femoris Architecture and Strength: A Systematic Review With Meta-Analysis. J Athl Train 2020; 55:501-514. [PMID: 32216654 DOI: 10.4085/1062-6050-194-19] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
OBJECTIVE To determine the effects of an eccentric hamstrings strength-training program, performed for at least 4 weeks by healthy adults, on muscle architecture and eccentric strength. DATA SOURCES A systematic search was performed up to October 2018 in the following electronic databases: PubMed, PEDro, CINAHL and SPORTDiscus. Combinations of the following search terms were used: eccentric strength training, eccentric loading, nordic hamstring, hamstring strength, fascicle length, pennation angle, muscle thickness, muscle architecture, biceps femoris long head, biceps femoris, and hamstring muscles. STUDY SELECTION Included articles were randomized controlled trials that allowed comparisons between isolated eccentric strength training of the biceps femoris muscle and other programs. DATA EXTRACTION Data from the included studies were extracted by 2 independent reviewers. These data included the study design, participant characteristics, inclusion and exclusion criteria of clinical studies, exercise and intervention characteristics, outcome measures, and the main results of the study. When meta-analysis was possible, we performed quantitative analysis. Ten randomized controlled trials were included. DATA SYNTHESIS Limited to moderate evidence indicated that eccentric strength training was associated with an increase in fascicle length (mean difference [MD] = 1.97; 95% confidence interval [CI] = 1.48, 2.46), an increase in muscle thickness (MD = 0.10; 95% CI = 0.06, 0.13), and a decrease in pennation angle (MD = 2.36; 95% CI = 1.61, 3.11). Conflicted to moderate evidence indicated that eccentric hamstrings strength was increased after eccentric strength training compared with concentric strength training (standardized mean difference [SMD] = 1.06; 95% CI = 0.26, 1.86), usual level of activity (SMD = 2.72; 95% CI = 1.68, 3.77), and static stretching (SMD = 0.39; 95% CI = -0.97, 1.75). CONCLUSIONS In healthy adults, an eccentric strength-training program produced architectural adaptations on the long head of the biceps femoris muscle and increased eccentric hamstrings strength.
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Affiliation(s)
- Rémy Gérard
- Department of Physical Therapy, Institut Parnasse-ISEI, Brussels, Belgium
| | - Léo Gojon
- Department of Physical Therapy, Institut Parnasse-ISEI, Brussels, Belgium
| | - Philippe Decleve
- Department of Physical Therapy, Institut Parnasse-ISEI, Brussels, Belgium.,Department of Rehabilitation Sciences and Physiotherapy, Faculty of Medicine and Health Sciences, University Hospital Ghent, Belgium
| | - Joachim Van Cant
- Department of Physical Therapy, Institut Parnasse-ISEI, Brussels, Belgium
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Fragala MS, Cadore EL, Dorgo S, Izquierdo M, Kraemer WJ, Peterson MD, Ryan ED. Resistance Training for Older Adults: Position Statement From the National Strength and Conditioning Association. J Strength Cond Res 2019; 33:2019-2052. [PMID: 31343601 DOI: 10.1519/jsc.0000000000003230] [Citation(s) in RCA: 518] [Impact Index Per Article: 103.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Fragala, MS, Cadore, EL, Dorgo, S, Izquierdo, M, Kraemer, WJ, Peterson, MD, and Ryan, ED. Resistance training for older adults: position statement from the national strength and conditioning association. J Strength Cond Res 33(8): 2019-2052, 2019-Aging, even in the absence of chronic disease, is associated with a variety of biological changes that can contribute to decreases in skeletal muscle mass, strength, and function. Such losses decrease physiologic resilience and increase vulnerability to catastrophic events. As such, strategies for both prevention and treatment are necessary for the health and well-being of older adults. The purpose of this Position Statement is to provide an overview of the current and relevant literature and provide evidence-based recommendations for resistance training for older adults. As presented in this Position Statement, current research has demonstrated that countering muscle disuse through resistance training is a powerful intervention to combat the loss of muscle strength and muscle mass, physiological vulnerability, and their debilitating consequences on physical functioning, mobility, independence, chronic disease management, psychological well-being, quality of life, and healthy life expectancy. This Position Statement provides evidence to support recommendations for successful resistance training in older adults related to 4 parts: (a) program design variables, (b) physiological adaptations, (c) functional benefits, and (d) considerations for frailty, sarcopenia, and other chronic conditions. The goal of this Position Statement is to a) help foster a more unified and holistic approach to resistance training for older adults, b) promote the health and functional benefits of resistance training for older adults, and c) prevent or minimize fears and other barriers to implementation of resistance training programs for older adults.
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Affiliation(s)
| | - Eduardo L Cadore
- School of Physical Education, Physiotherapy and Dance, Exercise Research Laboratory, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Sandor Dorgo
- Department of Kinesiology, University of Texas at El Paso, El Paso, Texas
| | - Mikel Izquierdo
- Department of Health Sciences, Public University of Navarre, CIBER of Frailty and Healthy Aging (CIBERFES), Navarrabiomed, Pamplona, Navarre, Spain
| | - William J Kraemer
- Department of Human Sciences, The Ohio State University, Columbus, Ohio
| | - Mark D Peterson
- Department of Physical Medicine and Rehabilitation, University of Michigan-Medicine, Ann Arbor, Michigan
| | - Eric D Ryan
- Department of Exercise and Sport Science, University of North Carolina-Chapel Hill, Chapel Hill, North Carolina
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28
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Koryak YA. Changes in human skeletal muscle architecture and function induced by extended spaceflight. J Biomech 2019; 97:109408. [PMID: 31662199 DOI: 10.1016/j.jbiomech.2019.109408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 08/20/2019] [Accepted: 10/06/2019] [Indexed: 11/15/2022]
Abstract
The aim of this study was to quantitatively describe the relationships between joint angles and muscle architecture (lengths (Lf) and angles (Θf) of fascicles) of human triceps surae [medial (MG) and lateral (LG) gastrocnemius and soleus (SOL) muscles] invivo for three men-cosmonaut after long-duration spaceflight. Sagittal sonographs of MG, LG, SOL were taken at ankle was positioned at 15° (dorsiflexion), 0° (neutral position), +15°, and +30° (plantarflexion), with the knee at 90° at rest and after a long-duration spaceflight. At each position, longitudinal ultrasonic images of the MG and LG and SOL were obtained while the cosmonauts was relaxed from which fascicle lengths and angles with respect to the aponeuroses were determined. After space flight plantarflexor force declined significantly (26%; p < 0.001). The internal architecture of the GM, and LG, and SOL muscle was significantly altered. In the passive condition, Lf changed from 45, 53, and 39 mm (knee, 0°, ankle, -15°) to 26, 33, and 28 mm (knee, 90° ankle, 30°) for MG, LG, and SOL, respectively. Different lengths and angles of fascicles, and their changes by contraction, might be related to differences in force-producing capabilities of the muscles and elastic characteristics of tendons and aponeuroses. The three heads of the triceps surae muscle substantially differ in architecture, which probably reflects their functional roles. Differences in fiber length and pennation angle that were observed among the muscles and could be associated with differences in force production and in elastic properties of musculo-tendinous complex and aponeuroses.
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Affiliation(s)
- Yuri A Koryak
- State Scientific Center of the Russian Federation - Institute of Biomedical Problems of the Russian Academy of Sciences, Russia.
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Valenzuela PL, Castillo-García A, Morales JS, Izquierdo M, Serra-Rexach JA, Santos-Lozano A, Lucia A. Physical Exercise in the Oldest Old. Compr Physiol 2019; 9:1281-1304. [PMID: 31688965 DOI: 10.1002/cphy.c190002] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Societies are progressively aging, with the oldest old (i.e., those aged >80-85 years) being the most rapidly expanding population segment. However, advanced aging comes at a price, as it is associated with an increased incidence of the so-called age-related conditions, including a greater risk for loss of functional independence. How to combat sarcopenia, frailty, and overall intrinsic capacity decline in the elderly is a major challenge for modern medicine, and exercise appears to be a potential solution. In this article, we first summarize the physiological mechanisms underlying the age-related deterioration in intrinsic capacity, particularly regarding those phenotypes related to functional decline. The main methods available for the physical assessment of the oldest old are then described, and finally the multisystem benefits that exercise (or "exercise mimetics" in those situations in which volitional exercise is not feasible) can provide to this population segment are reviewed. In summary, lifetime physical exercise can help to attenuate the loss of many of the properties affected by aging, especially when the latter is accompanied by an inactive lifestyle and benefits can also be obtained in frail individuals who start exercising at an advanced age. Multicomponent programs combining mainly aerobic and resistance training should be included in the oldest old, particularly during disuse situations such as hospitalization. However, evidence is still needed to support the effectiveness of passive physical strategies including neuromuscular electrical stimulation or vibration for the prevention of disuse-induced negative adaptations in those oldest old people who are unable to do physical exercise. © 2019 American Physiological Society. Compr Physiol 9:1281-1304, 2019.
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Affiliation(s)
- Pedro L Valenzuela
- Department of Systems Biology, University of Alcalá, Madrid, Spain.,Department of Sport and Health, Spanish Agency for Health Protection in Sport (AEPSAD), Madrid, Spain
| | | | - Javier S Morales
- Faculty of Sport Sciences, Universidad Europea de Madrid, Madrid, Spain
| | - Mikel Izquierdo
- Biomedical Research Networking Center on Frailty and Healthy Aging (CIBERFES), Madrid, Spain.,Department of Health Sciences, Public University of Navarra, Navarrabiomed, Idisna, Pamplona, Spain
| | - José A Serra-Rexach
- Biomedical Research Networking Center on Frailty and Healthy Aging (CIBERFES), Madrid, Spain.,Department of Geriatric, Hospital General Universitario Gregorio Marañón, Madrid, Spain
| | - Alejandro Santos-Lozano
- i+HeALTH, European University Miguel de Cervantes, Valladolid, Spain and Research Institute Hospital 12 de Octubre (ì+12'), Madrid, Spain
| | - Alejandro Lucia
- Faculty of Sport Sciences, Universidad Europea de Madrid, Madrid, Spain.,Biomedical Research Networking Center on Frailty and Healthy Aging (CIBERFES), Madrid, Spain
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Trezise J, Blazevich AJ. Anatomical and Neuromuscular Determinants of Strength Change in Previously Untrained Men Following Heavy Strength Training. Front Physiol 2019; 10:1001. [PMID: 31447693 PMCID: PMC6691166 DOI: 10.3389/fphys.2019.01001] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 07/18/2019] [Indexed: 11/13/2022] Open
Abstract
This study examined whether changes in strength following a moderate-duration strength training program were associated with changes in specific combinations of anatomical and neuromuscular variables. 36 men (18-40 y) completed 10 weeks of lower-limb heavy resistance (6-RM) strength training. Measurements included cross-sectional area (CSA), fascicle length (lf) and fascicle angle (θf) from proximal, middle and distal regions of the four quadriceps components; agonist (EMG:M), antagonist (EMG) muscle activities and percent voluntary quadriceps activation (%VA; interpolated twitch technique); patellar tendon moment arm distance; and maximal isometric, concentric and eccentric (60° s-1) torque. Multiple regression models were developed to quantify the relationship between the change in maximum torque and the changes in combinations of anatomical and neuromuscular variables. The best model for each contraction mode was determined using Akaike's Information Criterion (AICc), an information-theoretic approach for model selection. Strength increased significantly following training (mean range = 12.5-17.2%), and moderate relationships were observed between modeled data (using best-fit prediction models) and the change in torque for each contraction mode. The change in isometric torque was best (although weakly) predicted by the linear combination of the change in proximal-region vastus lateralis (VL) CSA and fascicle angle (R 2 = 0.27, p < 0.05; AICc wi = 0.52, i.e., the probability the model would be selected as the "best model"). The models best predicting the change in concentric and eccentric torque both included the combination of the change in quadriceps (i.e., mean of all muscles) EMG:M and the change in vastus intermedius fascicle angle combined with either a change in proximal-region VL (R 2 = 0.40, p < 0.001; AICc wi = 0.15) or whole quadriceps (R 2 = 0.41, p < 0.001; AICc wi = 0.30) CSA (concentric and eccentric, respectively). Models incorporating the change in proximal CSA typically received substantial support (AICC < 2) for concentric torque prediction models, and the change in % VA and pre-training moment arm distance had substantial support for use in eccentric torque prediction models. In conclusion, adaptations varied between individuals, however strength training programs targeted to improve a group of variables that particularly includes agonist muscle activation might yield the greatest improvements in concentric and eccentric knee extension strength, whereas proximal muscle size and fascicle angle appear most important for isometric torque improvements.
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Affiliation(s)
- J Trezise
- School of Medical and Health Sciences, Centre for Exercise and Sports Science Research (CESSR), Edith Cowan University, Joondalup, WA, Australia
| | - A J Blazevich
- School of Medical and Health Sciences, Centre for Exercise and Sports Science Research (CESSR), Edith Cowan University, Joondalup, WA, Australia
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Aubertin-Leheudre M, Martel D, Narici M, Bonnefoy M. The usefulness of muscle architecture assessed with ultrasound to identify hospitalized older adults with physical decline. Exp Gerontol 2019; 125:110678. [PMID: 31376472 DOI: 10.1016/j.exger.2019.110678] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 07/23/2019] [Accepted: 07/30/2019] [Indexed: 12/22/2022]
Abstract
BACKGROUND Muscle mass and strength decline are known to be key factors in the development of physical incapacities in later life. These structural and functional declines are even more significant in older people during hospitalizations, increasing risk of falls, fractures, and loss of quality of life. In clinical daily practice, functional and muscular decline are assessed using the validated Short Physical Performance Battery (SPPB). Nevertheless, psychological conditions (pain, demotivation, depression) and temporary physical incapacities (e.g: hip fracture) during hospitalization can be significant barriers to evaluate these patients. Skeletal muscle ultrasound assessment could be an alternative in clinical daily practice since muscle architecture (MA) is related to poor muscle function. However, this potential objective and clinical tool is not yet implemented in geriatric setting during hospitalization. Our study aimed at: 1) comparing MA, muscle mass and strength measurements in hospitalized older adults with different functional levels, 2) evaluating the association between these measurements. METHODS Forty-four hospitalized older adults were divided in 2 groups: 21 Pre-Disabled (PDis (SPPBscore: 6-9): 81 ± 7 years old, SPPBscore:7.6 ± 1.1) and 23 Disabled (Dis (SPPBscore:<6): 83 ± 7 years old, SPPBscore:3.6 ± 1.6). SPPB, body mass (BM) and composition (bio-impedance), handgrip strength (HS, dynamometer) and MA (Pennation angle (PA), muscle thickness (MT); ultrasound) were evaluated. RESULTS Relative muscle strength (HS/BM: 0.28 ± 0.08 vs 0.34 ± 0.09 kg/kg), PA (10.6 ± 1.8 vs 12.3 ± 1.9°), and MT (16.4 ± 0.4 vs 19.2 0.4 mm) but not lean body mass were significantly different between Dis and PDis, respectively. Significant associations between PA and the SPPBscore (r2 = 0.37) or walking speed (r2 = 0.38); between SCF and walking speed (r2 = -0.36); as well as between MT and SPPBscore (r2 = 0.29), walking speed (r2 = 0.30), LBM (r2 = 0.382) or MMI (r2 = 0.361) were observed. CONCLUSION Muscle architecture (proxy of muscle quality) and functional capacities/status of hospitalized older adults are related. Thus, ultrasound seems to be a potential useful and objective screening tool for clinicians to assess/prevent physical decline during hospitalization. Larger and/or longitudinal studies are needed to confirm our findings from a pilot pragmatic study.
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Affiliation(s)
- Mylène Aubertin-Leheudre
- Département des Sciences de l'activité physique, Université du Québec à Montréal (UQÀM), Montréal, Québec, Canada; Groupe de recherche en activité physique adaptée, Université du Québec à Montréal (UQÀM), Montréal, Québec, Canada; Centre de recherche de l'institut universitaire de gériatrie de Montréal, Montréal, Québec, Canada.
| | - Dominic Martel
- Département des Sciences de l'activité physique, Université du Québec à Montréal (UQÀM), Montréal, Québec, Canada; Groupe de recherche en activité physique adaptée, Université du Québec à Montréal (UQÀM), Montréal, Québec, Canada; Centre de recherche de l'institut universitaire de gériatrie de Montréal, Montréal, Québec, Canada
| | - Marco Narici
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Marc Bonnefoy
- Centre Hospitalier Universitaire de Lyon Sud, Lyon, France; Université Claude Bernard Lyon1, Faculté Lyon Sud, Inserm U 1060, France
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Koryak YA. Architectural and functional specifics of the human triceps surae muscle in vivo and its adaptation to microgravity. J Appl Physiol (1985) 2019; 126:880-893. [DOI: 10.1152/japplphysiol.00634.2018] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Long-term exposure to microgravity (μG) is known to reduce the strength of a skeletal muscle contraction and the level of general physical performance in humans, while little is known about its effect on muscle architecture. Architectural and contractile properties of the triceps surae (TS) muscle were determined in vivo for male cosmonauts in response ( n = 8) to a spaceflight (213.0 ± 30.5 days). The maximal voluntary contraction (MVC), tetanic tension ( Ро), and voluntary and electrically evoked contraction times and force deficiency (Pd) were determined. The ankle was positioned at 15° dorsiflexion (−15°) and 0, 15, and 30° plantar flexion, with the knee set at 90°. At each position, longitudinal ultrasonic images of the medial (MG) and lateral (LG) gastrocnemius and soleus (SOL) muscles were obtained while the subject was relaxed. After a spaceflight, MVC and Pо decreased by 42 and 26%, respectively, and Pd increased by 50%. The rate of tension of a voluntary contraction substantially reduced but evoked contractions remained unchanged. In the passive condition, fiber length ( Lf) changed from 43, 57, and 35 mm (knee, 0°; ankle, −15°) to 34, 38, and 25 mm (knee, 0°; ankle, 30°) for MG, LG, and SOL, respectively, and Θf changed from 27, 21, and 23° (knee, 0°; ankle, −15°) to 43, 29, and 34° (knee, 0°; ankle, 30°) for MG, LG, and SOL, respectively. Different Lf and Θf, and their changes after spaceflight, might be related to differences in force-producing capabilities of the muscles and elastic characteristics of tendons and aponeuroses. NEW & NOTEWORTHY The present work was the first to combine measuring the fiber length and pennation angle (ultrasound imaging) as main determinants of mechanical force production and evaluating the muscle function after a long-duration spaceflight. The results demonstrate that muscles with different functional roles may differently respond to unloading, and this circumstance is important to consider when planning rehabilitation after unloading of any kind, paying particular attention to postural muscles.
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Affiliation(s)
- Yuri A. Koryak
- State Scientific Center of the Russian Federation, Institute of Biomedical Problems of the Russian Academy of Sciences, Moscow, Russia
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Franchi MV, Monti E, Carter A, Quinlan JI, Herrod PJJ, Reeves ND, Narici MV. Bouncing Back! Counteracting Muscle Aging With Plyometric Muscle Loading. Front Physiol 2019; 10:178. [PMID: 30890953 PMCID: PMC6411845 DOI: 10.3389/fphys.2019.00178] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Accepted: 02/12/2019] [Indexed: 12/22/2022] Open
Abstract
The preservation of muscle power is crucial in aging for maintaining mobility and performing daily tasks. Resistance training involving high movement velocities represents a valid strategy to slow down the rate of sarcopenia, counteracting the loss of muscle mass and muscle power. Plyometric exercise may represent an effective training modality for increasing muscle power; however, its application in older populations has been sparingly investigated, as the high impact actions involved may reduce its feasibility for older individuals. By adopting a safer modality of plyometric training, we investigated if a 6-week plyometric training intervention could increase knee extensor muscle size, architecture, force and power in 14 young (YM, age = 25.4 ± 3.5 y; means ± SD) and nine older males (OM, age = 69.7 ± 3.4 y). Volunteers trained 3 times/week using a device similar to a leg press machine where the user was required to bounce against his body mass on a trampoline. Pre-to-post training changes in isometric maximum voluntary torque (MVT), leg extension power and vastus lateralis (VL) architecture were assessed. Muscle power increased in both groups (+27% OM -P < 0.001, 20% YM -P < 0.001), although the total external work performed during the training period was significantly lower for OM (i.e., ~-47%). Both groups showed significant increases in muscle thickness (MT) (+5.8 OM -P < 0.01 vs. +3.8% YM -P < 0.01), fascicle length (Lf) (+8% OM -P < 0.001 vs. +6% YM -P < 0.001), and pennation angle (PA) (+7.5% OM -P < 0.001 vs. +4.1% YM -P < 0.001). The current study shows that trampoline-based plyometric training is an effective intervention producing a rapid increase in muscle mass and power in both young and older individuals. The training modality used in this study seems to particularly benefit the older population, targeting the morphological and functional effects of sarcopenia in human muscle.
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Affiliation(s)
- Martino V Franchi
- Laboratory for Muscle Plasticity, Department of Orthopedics, Balgrist University Hospital, University of Zurich, Zurich, Switzerland.,Sports Medicine Research Group, Department of Orthopedics, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Elena Monti
- Department of Biomedical Sciences, Institute of Physiology, University of Padua, Padua, Italy
| | - Austin Carter
- MRC-ARUK Centre for Musculoskeletal Ageing, University of Nottingham, Derby, United Kingdom
| | - Jonathan I Quinlan
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Philip J J Herrod
- MRC-ARUK Centre for Musculoskeletal Ageing, University of Nottingham, Derby, United Kingdom
| | - Neil D Reeves
- School of Healthcare Science, Manchester Metropolitan University, Manchester, United Kingdom
| | - Marco V Narici
- Department of Biomedical Sciences, Institute of Physiology, University of Padua, Padua, Italy
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Barber L, Alexander C, Shipman P, Boyd R, Reid S, Elliott C. Validity and reliability of a freehand 3D ultrasound system for the determination of triceps surae muscle volume in children with cerebral palsy. J Anat 2018; 234:384-391. [PMID: 30525186 DOI: 10.1111/joa.12927] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/20/2018] [Indexed: 11/30/2022] Open
Abstract
This study assessed the validity, intra-rater and inter-rater reliability of segmentation of in vivo medial gastrocnemius (MG), lateral gastrocnemius (LG) and soleus (SOL) muscle volume measurement using a single sweep freehand 3D ultrasound (3DUS) in children with cerebral palsy (CP). The MG, LG and SOL of both limbs of 18 children with CP (age 8 years 4 months ± 1 year 10 months, 11 males, unilateral CP = 9, bilateral CP = 9, Gross Motor Functional Classification System I = 11, II = 7) were scanned using freehand 3DUS and magnetic resonance imaging (MRI). All freehand 3DUS and MRI images were segmented and volumes rendered by two raters. Validity was assessed using limits of agreement method. Intra-rater and inter-rater reliability was assessed using intra-class correlation (ICC), coefficient of variance (CV) and minimal detectable change (MDC). Freehand 3DUS overestimated muscle volume of the MG and LG by < 0.3 mL (1%) and underestimated SOL by < 1.3 mL (1.5%) compared with MRI. ICCs for intra-rater reliability of the segmentation process for the freehand 3DUS system and MRI for muscle volume were > 0.98 and 0.99, respectively, for all muscles. ICCs for inter-rater reliability of the segmentation process for freehand 3DUS and MRI volumes were > 0.96 and 0.98, respectively, for all muscles. MDCs for single rater freehand 3DUS and MRI were < 4.0 mL (14%) and 3.2 mL (11%), respectively, in all muscles. Freehand 3DUS is a valid and reliable method for the measurement of lower leg muscle volume that can be measured with a single sweep in children with CP in vivo. It can be used as an alternative to MRI for the detection of clinically relevant changes in calf muscle volume as the result of growth and interventions.
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Affiliation(s)
- L Barber
- School of Health, Medical and Applied Sciences, Central Queensland University, Bundaberg, QLD, Australia.,Child Health Research Centre, Faculty of Medicine, The University of Queensland, Brisbane, QLD, Australia
| | - C Alexander
- School of Sport Science, Exercise and Health, University of Western Australia, Perth, WA, Australia
| | - P Shipman
- Diagnostic Imaging, Princess Margaret Hospital, Subiaco, WA, Australia
| | - R Boyd
- Child Health Research Centre, Faculty of Medicine, The University of Queensland, Brisbane, QLD, Australia
| | - S Reid
- School of Sport Science, Exercise and Health, University of Western Australia, Perth, WA, Australia
| | - C Elliott
- School of Occupational Therapy, Social Work and Speech Pathology, Faculty of Health Sciences, Curtin University, Perth, WA, Australia
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Assessing sarcopenia with vastus lateralis muscle ultrasound: an operative protocol. Aging Clin Exp Res 2018; 30:1437-1443. [PMID: 29700758 DOI: 10.1007/s40520-018-0958-1] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Accepted: 04/20/2018] [Indexed: 12/13/2022]
Abstract
BACKGROUND Muscle ultrasound (MUS) has so far not been implemented for sarcopenia assessment in clinical geriatric practice due to allegedly low reproducibility of results in the absence of standardization of procedures. However, rigorous and standardized application of this technique yields highly reproducible results. Its application, especially if integrated with clinical evaluation and comprehensive geriatric assessment, proofs very useful for rapidly obtaining information on muscle mass and architecture. OBJECTIVE Here, we present a standardized protocol for performing right vastus lateralis (RVL) MUS and measuring parameters of muscle size and architecture. METHODS RVL muscle thickness (MT), fascicle length (FL), pennation angle (PA), echo-intensity (EI) and cross-sectional area (CSA) can be assessed with this protocol. A portable instrument equipped with a 5-cm long 3-11 mHz linear probe should be used with both B-mode real-time and extended-field-of-view (EFOV) techniques. Longitudinal B-mode and transverse EFOV images should be acquired during each exam, and analyzed with NIH-ImageJ software. CONCLUSIONS This operative protocol represents a good compromise between the feasibility of MUS in clinical settings and the need of obtaining precise measurements of muscle parameters. Future studies should verify the reproducibility of the proposed technique, and its correlation with appendicular lean mass and parameters of muscle function.
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Chino K, Takahashi H. Influence of pennation angle on measurement of shear wave elastography: in vivo observation of shear wave propagation in human pennate muscle. Physiol Meas 2018; 39:115003. [DOI: 10.1088/1361-6579/aae7e2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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The presence of a rotator cuff tear interferes with age-dependent muscle atrophy of intact shoulder muscles. An MRI study with 3 years' follow-up. Hum Mov Sci 2018; 62:161-168. [PMID: 30384184 DOI: 10.1016/j.humov.2018.10.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Revised: 09/19/2018] [Accepted: 10/10/2018] [Indexed: 11/23/2022]
Abstract
Rotator cuff muscle atrophy is frequently studied, but it is unknown whether redistribution of mechanical load in the presence of a rotator cuff tear influence muscle atrophy that is observed in patients. We hypothesized that in the presence of a supraspinatus tear, redistribution of mechanical load towards teres minor and deltoid slows down atrophy of these muscles over time. In this retrospective observational study of 129 patients, we measured the cross-sectional surface-areas on MRI of shoulder muscles in an intact rotator cuff (n = 92) and in a supraspinatus-tear group (n = 37) with a mean follow-up of 3 ± 1.8 years. Mixed models were applied to evaluate changes in surface-area of the rotator cuff and deltoid with adjustments for age, sex and follow-up time. In patients with an intact rotator cuff, the mean surface-area of the teres minor decreased 6 mm2/year (95% CI 0.7-11.1, P = 0.026) and the mean deltoid surface-area decreased 75 mm2/year (95% CI 24.5-124.8, P = 0.004). The presence of a rotator cuff tear was associated with less reduction of teres minor and deltoid surface-area in patients <50 years, with an effect of a tear of 22 mm2/year (95% CI 1.7-41.7, P = 0.034) and 250 mm2/year (95% CI 75.8-424.3, P = 0.006), respectively. Whereas the surface-area of teres minor and deltoid decrease over time in patient with an intact rotator cuff, the decline in surface-area of these muscles was substantially less in the presence of a rotator cuff tear. Our findings indicate that atrophy may be reduced if an increase in mechanical load is exerted onto the muscle.
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Physical strategies to prevent disuse-induced functional decline in the elderly. Ageing Res Rev 2018; 47:80-88. [PMID: 30031068 DOI: 10.1016/j.arr.2018.07.003] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2018] [Revised: 05/08/2018] [Accepted: 07/09/2018] [Indexed: 01/07/2023]
Abstract
Disuse situations can have serious adverse health consequences in the elderly, including mainly functional impairment with subsequent increase in the risk of falls or morbimortality. The present review provides clinicians and care givers with detailed and practical information on the feasibility and effectiveness of physical strategies that are currently available to prevent or attenuate the functional decline that occurs secondarily to disuse situations in the elderly, notably in the hospital setting. In this context, active approaches such as resistance exercises and maximal voluntary contractions, which can be performed both isometrically and dynamically, are feasible during most immobilization situations including in hospitalized old people and represent powerful tools for the prevention of muscle atrophy. Aerobic exercise should also be prescribed whenever possible to reduce the loss of cardiovascular capacity associated with disuse periods. Other feasible strategies for patients who are unwilling or unable to perform volitional exercise comprise neuromuscular electrical stimulation, vibration, and blood flow restriction. However, they should ideally be applied synchronously with voluntary exercise to obtain synergistic benefits.
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39
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Application of ultrasound for muscle assessment in sarcopenia: towards standardized measurements. Eur Geriatr Med 2018; 9:739-757. [DOI: 10.1007/s41999-018-0104-9] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Accepted: 08/29/2018] [Indexed: 12/22/2022]
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40
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Shiau K, Tsao TH, Yang CB. Effects of Single Versus Multiple Bouts of Resistance Training on Maximal Strength and Anaerobic Performance. J Hum Kinet 2018; 62:231-240. [PMID: 29922394 PMCID: PMC6006538 DOI: 10.1515/hukin-2017-0122] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
This study examined the effects of one single bout daily versus triple bouts of resistance exercise for 12 weeks on muscular strength and anaerobic performance of the upper body. Twenty young male adults (age: 22.0 ± 1.0 years, bench press: 44.0 ± 10.3 kg) were randomly assigned to a single bout (SB) or triple bouts (TB) of resistance exercise group. Maximal strength and anaerobic performance of the upper body using the bench press (one-repetition maximum) and the modified 30 s Wingate test were determined before and after the intervention. Additionally, changes in lactate levels before and after the Wingate test were measured. Although the SB and TB groups showed a significant increase in maximal strength (post-intervention, SB: 67.2 ± 9.2 and TB: 67.6 ± 7.6 kg, respectively) compared with the values at pre-intervention (SB: 44.6 ± 11.4 and TB: 43.9 ± 8.7 kg, respectively), there was no significant difference for this variable between the two groups post-intervention (p > 0.05). The anaerobic performance of the upper body in the SB and TB groups also displayed improvements without significant difference between the two groups after the completion of different training regimes. On the basis of the same training volume, multiple bouts of resistance training showed similar improvements in maximal strength and anaerobic performance to one bout of resistance training in young adult men without prior experience in resistance training.
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Affiliation(s)
- Kai Shiau
- Air Force Institute of Technology, Kaohsiung, Taiwan
| | - Te Hung Tsao
- Physical Education Section of General Education, National Sun Yat-Sen University, Kaohsiung, Taiwan
| | - Chang Bin Yang
- Department of Physical Education and Kinesiology, National Dong Hwa University, Hualien, Taiwan
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Effect of resistance training on muscle strength and rate of force development in healthy older adults: A systematic review and meta-analysis. Exp Gerontol 2018; 102:51-58. [DOI: 10.1016/j.exger.2017.11.020] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2017] [Revised: 11/07/2017] [Accepted: 11/27/2017] [Indexed: 11/22/2022]
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Franchi MV, Longo S, Mallinson J, Quinlan JI, Taylor T, Greenhaff PL, Narici MV. Muscle thickness correlates to muscle cross-sectional area in the assessment of strength training-induced hypertrophy. Scand J Med Sci Sports 2017; 28:846-853. [PMID: 28805932 PMCID: PMC5873262 DOI: 10.1111/sms.12961] [Citation(s) in RCA: 172] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/10/2017] [Indexed: 12/11/2022]
Abstract
Muscle thickness (MT) measured by ultrasound has been used to estimate cross-sectional area (measured by CT and MRI) at a single time point. We tested whether MT could be used as a valid marker of MRI determined muscle anatomical cross-sectional area (ACSA) and volume changes following resistance training (RT). Nine healthy, young, male volunteers (24 ± 2 y.o., BMI 24.1 ± 2.8 kg/m2 ) had vastus lateralis (VL) muscle volume (VOL) and ACSAmid (at 50% of femur length, FL) assessed by MRI, and VL MT measured by ultrasound at 50% FL. Measurements were taken at baseline and after 12 weeks of isokinetic RT. Differences between baseline and post-training were assessed by Student's paired t test. The relationships between MRI and ultrasound measurements were tested by Pearson's correlation. After RT, MT increased by 7.5 ± 6.1% (P < .001), ACSAmid by 5.2 ± 5% (P < .001), and VOL by 5.0 ± 6.9% (P < .05) (values: means ± SD). Positive correlations were found, at baseline and 12 weeks, between MT and ACSAmid (r = .82, P < .001 and r = .73, P < .001, respectively), and between MT and VOL (r = .76, P < .001 and r = .73, P < .001, respectively). The % change in MT with training was correlated with % change in ACSAmid (r = .69, P < .01), but not % change in VOL (r = .33, P > .05). These data support evidence that MT is a reliable index of muscle ACSAmid and VOL at a single time point. MT changes following RT are associated with parallel changes in muscle ACSAmid but not with the changes in VOL, highlighting the impact of RT on regional hypertrophy.
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Affiliation(s)
- M V Franchi
- MRC-ARUK Centre for Musculoskeletal Ageing Research, University of Nottingham, Nottingham, UK.,Laboratory for Muscle Plasticity, Department of Orthopaedics, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - S Longo
- Department of Biomedical Sciences for Health, Università degli studi di Milano, Milan, Italy
| | - J Mallinson
- MRC-ARUK Centre for Musculoskeletal Ageing Research, University of Nottingham, Nottingham, UK
| | - J I Quinlan
- MRC-ARUK Centre for Musculoskeletal Ageing Research, University of Nottingham, Nottingham, UK
| | - T Taylor
- MRC-ARUK Centre for Musculoskeletal Ageing Research, University of Nottingham, Nottingham, UK
| | - P L Greenhaff
- MRC-ARUK Centre for Musculoskeletal Ageing Research, University of Nottingham, Nottingham, UK
| | - M V Narici
- MRC-ARUK Centre for Musculoskeletal Ageing Research, University of Nottingham, Nottingham, UK
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Bampouras TM, Reeves ND, Baltzopoulos V, Maganaris CN. The role of agonist and antagonist muscles in explaining isometric knee extension torque variation with hip joint angle. Eur J Appl Physiol 2017; 117:2039-2045. [PMID: 28803367 DOI: 10.1007/s00421-017-3693-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 07/31/2017] [Indexed: 12/27/2022]
Abstract
PURPOSE The biarticular rectus femoris (RF), operating on the ascending limb of the force-length curve, produces more force at longer lengths. However, experimental studies consistently report higher knee extension torque when supine (longer RF length) compared to seated (shorter RF length). Incomplete activation in the supine position has been proposed as the reason for this discrepancy, but differences in antagonistic co-activation could also be responsible due to altered hamstrings length. We examined the role of agonist and antagonist muscles in explaining the isometric knee extension torque variation with changes in hip joint angle. METHOD Maximum voluntary isometric knee extension torque (joint MVC) was recorded in seated and supine positions from nine healthy males (30.2 ± 7.7 years). Antagonistic torque was estimated using EMG and added to the respective joint MVC (corrected MVC). Submaximal tetanic stimulation quadriceps torque was also recorded. RESULT Joint MVC was not different between supine (245 ± 71.8 Nm) and seated (241 ± 69.8 Nm) positions and neither was corrected MVC (257 ± 77.7 and 267 ± 87.0 Nm, respectively). Antagonistic torque was higher when seated (26 ± 20.4 Nm) than when supine (12 ± 7.4 Nm). Tetanic torque was higher when supine (111 ± 31.9 Nm) than when seated (99 ± 27.5 Nm). CONCLUSION Antagonistic co-activation differences between hip positions do not account for the reduced MVC in the supine position. Rather, reduced voluntary knee extensor muscle activation in that position is the major reason for the lower MVC torque when RF is lengthened (hip extended). These findings can assist standardising muscle function assessment and improving musculoskeletal modelling applications.
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Affiliation(s)
- Theodoros M Bampouras
- Department of Medical and Sport Sciences, University of Cumbria, Bowerham road, Lancaster, LA1 3JD, UK.
- School of Healthcare Science, Manchester Metropolitan University, Manchester, UK.
| | - Neil D Reeves
- School of Healthcare Science, Manchester Metropolitan University, Manchester, UK
| | - Vasilios Baltzopoulos
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK
| | - Constantinos N Maganaris
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK
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44
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Interplay between body stabilisation and quadriceps muscle activation capacity. J Electromyogr Kinesiol 2017; 34:44-49. [DOI: 10.1016/j.jelekin.2017.03.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2016] [Revised: 10/30/2016] [Accepted: 03/10/2017] [Indexed: 11/22/2022] Open
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Acute effects of static stretching on muscle-tendon mechanics of quadriceps and plantar flexor muscles. Eur J Appl Physiol 2017; 117:1309-1315. [PMID: 28444436 DOI: 10.1007/s00421-017-3618-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Accepted: 04/18/2017] [Indexed: 10/19/2022]
Abstract
PURPOSE This study aimed to determine the acute effects of static stretching on stiffness indexes of two muscle groups with a contrasting difference in muscle-tendon proportion. METHODS Eleven active males were tested on an isokinetic dynamometer during four sessions randomly presented. Two sessions were dedicated to quadriceps and the two others to triceps surae muscles. Before and immediately after the stretching procedure (5 × 30 s), gastrocnemius medialis and rectus femoris fascicle length and myotendinous junction elongation were determined using ultrasonography. Passive and maximal voluntary torques were measured. Fascicle and myotendinous junction stiffness indexes were calculated. RESULTS After stretching, maximal voluntary torque similarly decreased for both muscle groups. Passive torque significantly decreased on triceps surae and remained unchanged on quadriceps muscles. Fascicle length increased similarly for both muscles. However, myotendinous junction elongation remained unchanged for gastrocnemius medialis and increased significantly for rectus femoris muscle. Fascicle stiffness index significantly decreased on medial gastrocnemius and remained unchanged on rectus femoris muscle. In contrast, myotendinous junction stiffness index similarly decreased on both muscles. CONCLUSION Depending on the muscle considered, the present results revealed different acute stretching effects. This muscle dependency appeared to affect primarily fascicle stiffness index rather than the myotendinous junction.
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Assessing muscle strength for the purpose of classification in Paralympic sport: A review and recommendations. J Sci Med Sport 2017; 20:391-396. [DOI: 10.1016/j.jsams.2016.08.010] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Revised: 06/27/2016] [Accepted: 08/18/2016] [Indexed: 11/21/2022]
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Narici M, Franchi M, Maganaris C. Muscle structural assembly and functional consequences. ACTA ACUST UNITED AC 2016; 219:276-84. [PMID: 26792340 DOI: 10.1242/jeb.128017] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The relationship between muscle structure and function has been a matter of investigation since the Renaissance period. Extensive use of anatomical dissections and the introduction of the scientific method enabled early scholars to lay the foundations of muscle physiology and biomechanics. Progression of knowledge in these disciplines led to the current understanding that muscle architecture, together with muscle fibre contractile properties, has a major influence on muscle mechanical properties. Recently, advances in laser diffraction, optical microendoscopy and ultrasonography have enabled in vivo investigations into the behaviour of human muscle fascicles and sarcomeres with varying joint angle and muscle contraction intensity. With these technologies it has become possible to identify the length region over which fascicles and sarcomeres develop maximum isometric force in vivo as well as the operating ranges of fascicles and sarcomeres during real-life activities such as walking. Also, greater insights into the remodelling of muscle architecture in response to overloading and unloading, and in ageing, have been obtained by the use of ultrasonography; these have led to the identification of clinical biomarkers of disuse atrophy and sarcopenia. Recent evidence also shows that the pattern of muscle hypertrophy in response to chronic loading is contraction-mode dependent (eccentric versus concentric), as similar gains in muscle mass, but through differing addition of sarcomeres in series and in parallel (as indirectly inferred from changes in fascicle length and pennation angle), have been found. These innovative observations prompted a new set of investigations into the molecular mechanisms regulating this contraction-specific muscle growth.
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Affiliation(s)
- Marco Narici
- University of Nottingham, Division of Medical Sciences and Graduate Entry Medicine, School of Medicine, Faculty of Medicine and Health Sciences, MRC-ARUK Centre of Excellence for Musculoskeletal Ageing Research, Derby Royal Hospital, Derby DE22 3DT, UK
| | - Martino Franchi
- University of Nottingham, Division of Medical Sciences and Graduate Entry Medicine, School of Medicine, Faculty of Medicine and Health Sciences, MRC-ARUK Centre of Excellence for Musculoskeletal Ageing Research, Derby Royal Hospital, Derby DE22 3DT, UK
| | - Constantinos Maganaris
- Research Institute for Sport and Exercise Sciences, Faculty of Science, Liverpool John Moores University, Liverpool L3 3AF, UK
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Bourne MN, Duhig SJ, Timmins RG, Williams MD, Opar DA, Al Najjar A, Kerr GK, Shield AJ. Impact of the Nordic hamstring and hip extension exercises on hamstring architecture and morphology: implications for injury prevention. Br J Sports Med 2016; 51:469-477. [DOI: 10.1136/bjsports-2016-096130] [Citation(s) in RCA: 132] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/24/2016] [Indexed: 01/07/2023]
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Gillett JG, Boyd RN, Carty CP, Barber LA. The impact of strength training on skeletal muscle morphology and architecture in children and adolescents with spastic cerebral palsy: A systematic review. RESEARCH IN DEVELOPMENTAL DISABILITIES 2016; 56:183-196. [PMID: 27337690 DOI: 10.1016/j.ridd.2016.06.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Revised: 04/27/2016] [Accepted: 06/03/2016] [Indexed: 06/06/2023]
Abstract
AIM The aim of this study was to systematically review the current literature to determine the impact of strength training on skeletal muscle morphology and architecture in individuals aged 4-20 years with spastic type cerebral palsy. METHODS A comprehensive search for randomised and non-randomised controlled trials, cohort studies and cross-comparison trials was performed on five electronic databases. Included studies were graded according to level of evidence and assessed for methodological quality using the Downs and Black scale. Quantitative data was analysed using effect sizes. RESULTS Six of 304 articles met the inclusion criteria. Methodological quality of the included papers ranged from 14 to 19 (out of 32). A large effect was found on muscle cross-sectional area following strength training, with small to moderate effects on muscle volume and thickness. CONCLUSION AND IMPLICATIONS There is preliminary evidence that strength training leads to hypertrophy in children and adolescents with CP. A paucity of studies exist measuring morphological and architectural parameters following strength training in these individuals. Overall low study methodological quality along with heterogeneous study design, dissimilar outcome measures, and lack of adequate control groups, indicated that care is needed when interpreting the results of these studies in isolation.
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Affiliation(s)
- Jarred G Gillett
- Queensland Cerebral Palsy and Rehabilitation Research Centre, Child Health Research Centre, Faculty of Medicine and Biomedical Sciences, The University of Queensland, South Brisbane, Queensland, Australia.
| | - Roslyn N Boyd
- Queensland Cerebral Palsy and Rehabilitation Research Centre, Child Health Research Centre, Faculty of Medicine and Biomedical Sciences, The University of Queensland, South Brisbane, Queensland, Australia
| | - Christopher P Carty
- Queensland Children's Motion Analysis Service, Centre for Children's Health Research, Children's Health Queensland Hospital and Health Service, South Brisbane, Queensland, Australia; Centre for Musculoskeletal Research, Menzies Health Institute Queensland, Griffith University, Gold Coast, Queensland, Australia
| | - Lee A Barber
- Queensland Cerebral Palsy and Rehabilitation Research Centre, Child Health Research Centre, Faculty of Medicine and Biomedical Sciences, The University of Queensland, South Brisbane, Queensland, Australia
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Guex K, Degache F, Morisod C, Sailly M, Millet GP. Hamstring Architectural and Functional Adaptations Following Long vs. Short Muscle Length Eccentric Training. Front Physiol 2016; 7:340. [PMID: 27536252 PMCID: PMC4971444 DOI: 10.3389/fphys.2016.00340] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 07/21/2016] [Indexed: 11/18/2022] Open
Abstract
Most common preventive eccentric-based exercises, such as Nordic hamstring do not include any hip flexion. So, the elongation stress reached is lower than during the late swing phase of sprinting. The aim of this study was to assess the evolution of hamstring architectural (fascicle length and pennation angle) and functional (concentric and eccentric optimum angles and concentric and eccentric peak torques) parameters following a 3-week eccentric resistance program performed at long (LML) vs. short muscle length (SML). Both groups performed eight sessions of 3–5 × 8 slow maximal eccentric knee extensions on an isokinetic dynamometer: the SML group at 0° and the LML group at 80° of hip flexion. Architectural parameters were measured using ultrasound imaging and functional parameters using the isokinetic dynamometer. The fascicle length increased by 4.9% (p < 0.01, medium effect size) in the SML and by 9.3% (p < 0.001, large effect size) in the LML group. The pennation angle did not change (p = 0.83) in the SML and tended to decrease by 0.7° (p = 0.09, small effect size) in the LML group. The concentric optimum angle tended to decrease by 8.8° (p = 0.09, medium effect size) in the SML and by 17.3° (p < 0.01, large effect size) in the LML group. The eccentric optimum angle did not change (p = 0.19, small effect size) in the SML and tended to decrease by 10.7° (p = 0.06, medium effect size) in the LML group. The concentric peak torque did not change in the SML (p = 0.37) and the LML (p = 0.23) groups, whereas eccentric peak torque increased by 12.9% (p < 0.01, small effect size) and 17.9% (p < 0.001, small effect size) in the SML and the LML group, respectively. No group-by-time interaction was found for any parameters. A correlation was found between the training-induced change in fascicle length and the change in concentric optimum angle (r = −0.57, p < 0.01). These results suggest that performing eccentric exercises lead to several architectural and functional adaptations. However, further investigations are required to confirm the hypothesis that performing eccentric exercises at LML may lead to greater adaptations than a similar training performed at SML.
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Affiliation(s)
- Kenny Guex
- Department of Physiotherapy, University of Health Sciences (Haute Ecole de Santé Vaud), University of Applied Sciences and Arts Western Switzerland (Haute École Spécialisée de Suisse Occidentale) Lausanne, Switzerland
| | - Francis Degache
- Department of Physiotherapy, University of Health Sciences (Haute Ecole de Santé Vaud), University of Applied Sciences and Arts Western Switzerland (Haute École Spécialisée de Suisse Occidentale) Lausanne, Switzerland
| | - Cynthia Morisod
- Department of Physiology, Faculty of Biology and Medicine, Institute of Sport Sciences, University of Lausanne Lausanne, Switzerland
| | | | - Gregoire P Millet
- Department of Physiology, Faculty of Biology and Medicine, Institute of Sport Sciences, University of Lausanne Lausanne, Switzerland
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