1
|
Three Simulated Goalball Games in the Same Day Cause Central Fatigue and Can Impair Game Technical Performance. Adapt Phys Activ Q 2022; 39:356-373. [PMID: 35287114 DOI: 10.1123/apaq.2021-0171] [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: 09/23/2021] [Revised: 01/15/2022] [Accepted: 01/20/2022] [Indexed: 11/18/2022] Open
Abstract
The purpose of this study was to investigate the effects of three simulated goalball games on neuromuscular, physiological, perceptual, and technical parameters. Ten male players underwent assessments before and immediately after each game. Heart rate was recorded at rest and during all games that were entirely filmed for further technical performance analysis. Exercise significantly decreased knee extensor muscles peak force and percentage of voluntary activation after the second and third games, indicating the presence of central fatigue. Heart rate responses remained predominantly in a range equivalent to moderate activity intensity in all games. In addition, perceptual parameters were associated with reduced frequency of throws and density of actions. These findings suggest significant implications for the management of physical training, game strategy during a competition, and fixture change from three to two games per day.
Collapse
|
2
|
Kishimoto KC, Héroux ME, Gandevia SC, Butler JE, Diong J. Estimation of maximal muscle electromyographic activity from the relationship between muscle activity and voluntary activation. J Appl Physiol (1985) 2021; 130:1352-1361. [PMID: 33600280 DOI: 10.1152/japplphysiol.00557.2020] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Maximal muscle activity recorded with surface electromyography (EMG) is an important neurophysiological measure. It is frequently used to normalize EMG activity recorded during passive or active movement. However, the true maximal muscle activity cannot be determined in people with impaired capacity to voluntarily activate their muscles. Here, we determined whether maximal muscle activity can be estimated from muscle activity produced during submaximal voluntary activation. Twenty-five able-bodied adults (18 males, mean age 29 yr, range 19-64 yr) participated in the study. Participants were seated with the knee flexed 90° and the ankle in 5° of dorsiflexion from neutral. Participants performed isometric voluntary ankle plantarflexion contractions at target torques, in random order: 1, 5, 10, 15, 25, 50, 75, 90, 95, and 100% of maximal voluntary torque. Ankle torque, muscle activity in soleus, medial and lateral gastrocnemius muscles, and voluntary muscle activation determined using twitch interpolation were recorded. There was a strong loge-linear relationship between measures of muscle activation and muscle activity in all three muscles tested. Linear mixed models were fitted to muscle activation and loge-transformed EMG data. Each 1% increase in muscle activation increased muscle activity by a mean of 0.027 ln(mV) [95% confidence interval (CI) 0.025 to 0.029 ln(mV)] in soleus, 0.025 ln(mV) [0.022 to 0.028 ln(mV)] in medial gastrocnemius, and 0.028 ln(mV) [0.026 to 0.030 ln(mV)] in lateral gastrocnemius. The relationship between voluntary muscle activation and muscle activity can be described with simple mathematical functions. In future, it should be possible to normalize recorded muscle activity using these types of functions.NEW & NOTEWORTHY Muscle activity is often normalized to maximal muscle activity; however, it is difficult to obtain accurate measures of maximal muscle activity in people with impaired voluntary neural drive. We determined the relationship between voluntary muscle activation and plantarflexor muscle activity across a broad range of muscle activation values in able-bodied people. The relationship between voluntary muscle activation and muscle activity can be described with simple mathematical functions capable of estimating maximal muscle activity.
Collapse
Affiliation(s)
- Kenzo C Kishimoto
- Discipline of Physiotherapy, Faculty of Health Sciences, The University of Sydney, Sydney, New South Wales, Australia
| | - Martin E Héroux
- Neuroscience Research Australia (NeuRA), Sydney, New South Wales, Australia.,School of Medical Sciences, University of New South Wales, Sydney, New South Wales, Australia
| | - Simon C Gandevia
- Neuroscience Research Australia (NeuRA), Sydney, New South Wales, Australia.,Prince of Wales Clinical School, University of New South Wales, Sydney, New South Wales, Australia
| | - Jane E Butler
- Neuroscience Research Australia (NeuRA), Sydney, New South Wales, Australia.,School of Medical Sciences, University of New South Wales, Sydney, New South Wales, Australia
| | - Joanna Diong
- Neuroscience Research Australia (NeuRA), Sydney, New South Wales, Australia.,Discipline of Anatomy and Histology, Faculty of Medicine and Health, School of Medical Sciences, The University of Sydney, Sydney, New South Wales, Australia
| |
Collapse
|
3
|
Geiger M, Roche N, Vlachos E, Cattagni T, Zory R. Acute effects of bi-hemispheric transcranial direct current stimulation on the neuromuscular function of patients with chronic stroke: A randomized controlled study. Clin Biomech (Bristol, Avon) 2019; 70:1-7. [PMID: 31376801 DOI: 10.1016/j.clinbiomech.2019.07.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Revised: 07/13/2019] [Accepted: 07/23/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND Muscle weakness in patients with chronic stroke is due to neuromuscular disorders such as muscle atrophy, loss of voluntary activation or weak muscle contractile properties which are majored by the imbalance of interhemispheric inhibition following stroke. In patients with chronic stroke, unilateral transcranial direct current stimulation improved the maximal isometric strength of paretic knee extensors, but bilateral transcranial direct current stimulation failed to improve concentric strength. This study aimed to assess if a bilateral current stimulation improves isometric maximal strength, voluntary activation and contractile properties of knee extensors in patients with chronic stroke. METHODS Thirteen patients with chronic stroke and eight young healthy individuals participated in this randomized, simple-blinded, crossover study that included two experimental sessions: one with sham bilateral transcranial direct current stimulation and another with effective bilateral transcranial direct current stimulation (20 min, 2 mA). In the stroke patients, the anode was placed over the primary motor cortex of the affected hemisphere and the cathode over the contralateral primary motor cortex. In healthy participants, the brain side targeted by the anode and the cathode was randomly assigned. In each session, participants performed three assessments of strength, voluntary activation and contractile properties: before, during and after effective/sham bilateral transcranial direct current stimulation. FINDINGS Bilateral transcranial direct current stimulation had no effect on any neuromuscular assessments in both groups (All P values > 0.05, partial eta-squares varied from 0.02 to 0.06). INTERPRETATION A single session of bilateral transcranial direct current stimulation did not compensate muscular weakness of knee extensors in patients with chronic stroke.
Collapse
Affiliation(s)
- M Geiger
- AP-HP, Raymond Poincaré Teaching Hospital, Inserm Unit 1179, Team 3: Technologies and Innovative Therapies Applied to Neuromuscular diseases, UVSQ, CIC 805, Physiology-Functional Testing Ward, Garches, France; CIAMS, Univ. Paris-Sud, Université Paris-Saclay, 91405 Orsay Cedex, France; CIAMS, Université d'Orléans, 45067 Orléans, France; Fondation Garches, Garches, France.
| | - N Roche
- AP-HP, Raymond Poincaré Teaching Hospital, Inserm Unit 1179, Team 3: Technologies and Innovative Therapies Applied to Neuromuscular diseases, UVSQ, CIC 805, Physiology-Functional Testing Ward, Garches, France; Fondation Garches, Garches, France.
| | - E Vlachos
- AP-HP, Raymond Poincaré Teaching Hospital, CIC Inserm Unit 1429, Garches, France.
| | - T Cattagni
- AP-HP, Raymond Poincaré Teaching Hospital, Inserm Unit 1179, Team 3: Technologies and Innovative Therapies Applied to Neuromuscular diseases, UVSQ, CIC 805, Physiology-Functional Testing Ward, Garches, France; Fondation Garches, Garches, France; Nantes Université, Mouvement - Interactions - Performance, MIP, EA 4334, F -44000 Nantes, France.
| | - R Zory
- Université Côte d'Azur, LAMHESS, France.
| |
Collapse
|
4
|
Jakubowski KL, Smith AC, Elliott JM, Lee SSM. The Relationship Between Volitional Activation and Muscle Properties in Incomplete Spinal Cord Injury. Top Spinal Cord Inj Rehabil 2018; 24:1-5. [PMID: 29434455 DOI: 10.1310/sci17-00007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Purpose: Following a motor incomplete spinal cord injury (iSCI), there is decreased volitional activation and changes in composition, architecture, and stiffness of affected muscles. We investigated the relationship between muscle properties and volitional activation. Methods: The relationship between central activation ratio (CAR), maximum volitional torque (MVT), and muscle properties was assessed in the gastrocnemius of 6 participants with iSCI. Results: No significant relationship was found between CAR and muscle properties, while a significant relationship was found between CAR and MVT. Conclusion: Our findings suggest there may be no relationship between volitional activation and muscle; thus, certain patients with iSCI may benefit from therapies targeted at neural control.
Collapse
Affiliation(s)
- Kristen L Jakubowski
- Department of Physical Therapy and Human Movement Sciences, Northwestern University, Chicago, Illinois
| | - Andrew C Smith
- School of Physical Therapy, Regis University, Denver, Colorado
| | - James M Elliott
- Department of Physical Therapy and Human Movement Sciences, Northwestern University, Chicago, Illinois
| | - Sabrina S M Lee
- Department of Physical Therapy and Human Movement Sciences, Northwestern University, Chicago, Illinois
| |
Collapse
|
5
|
Smith AC, Knikou M, Yelick KL, Alexander AR, Murnane MM, Kritselis AA, Houmpavlis PJ, McPherson JG, Wasielewski M, Hoggarth MA, Elliott JM. MRI measures of fat infiltration in the lower extremities following motor incomplete spinal cord injury: reliability and potential implications for muscle activation. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2017; 2016:5451-5456. [PMID: 28269491 DOI: 10.1109/embc.2016.7591960] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Muscle fat infiltration (MFI) is an expected consequence of incomplete spinal cord injury (iSCI). The MFI magnitude may have clinical value in determining functional recovery. However, there is a lack of understanding of how MFI relates to the volitional muscle activity in people with motor incomplete spinal cord injury (iSCI). Five iSCI and 5 uninjured age-matched control subjects participated in the study. In this preliminary study, we established the reliability of MFI quantification of select lower extremity muscles across different raters. Secondly, we assessed the magnitude and distribution of MFI in the lower legs of iSCI and uninjured control participants. Thirdly, we explored the relationship between MFI in the plantar flexor muscles and the ability to volitionally activate these muscles. High levels of inter-rater reliability were observed. The iSCI group had significantly elevated and a vastly different MFI distribution in the lower leg muscles compared to healthy controls. MFI was negatively correlated with volitional activation in iSCI. Our preliminary results sanction the importance of lower extremity MFI quantification as a potential measure in determining the functional outcomes in iSCI, and the subsequent pathological sequelae.
Collapse
|
6
|
Milioni F, Vieira LHP, Barbieri RA, Zagatto AM, Nordsborg NB, Barbieri FA, Dos-Santos JW, Santiago PRP, Papoti M. Futsal Match-Related Fatigue Affects Running Performance and Neuromuscular Parameters but Not Finishing Kick Speed or Accuracy. Front Physiol 2016; 7:518. [PMID: 27872598 PMCID: PMC5097919 DOI: 10.3389/fphys.2016.00518] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 10/20/2016] [Indexed: 01/25/2023] Open
Abstract
Purpose: The aim of the present study was to investigate the influence of futsal match-related fatigue on running performance, neuromuscular variables, and finishing kick speed and accuracy. Methods: Ten professional futsal players participated in the study (age: 22.2 ± 2.5 years) and initially performed an incremental protocol to determine maximum oxygen uptake (V˙O2max: 50.6 ± 4.9 mL.kg−1.min−1). Next, simulated games were performed, in four periods of 10 min during which heart rate and blood lactate concentration were monitored. The entire games were video recorded for subsequent automatic tracking. Before and immediately after the simulated game, neuromuscular function was measured by maximal isometric force of knee extension, voluntary activation using twitch interpolation technique, and electromyographic activity. Before, at half time, and immediately after the simulated game, the athletes also performed a set of finishing kicks for ball speed and accuracy measurements. Results: Total distance covered (1st half: 1986.6 ± 74.4 m; 2nd half: 1856.0 ± 129.7 m, P = 0.00) and distance covered per minute (1st half: 103.2 ± 4.4 m.min−1; 2nd half: 96.4 ± 7.5 m.min−1, P = 0.00) demonstrated significant declines during the simulated game, as well as maximal isometric force of knee extension (Before: 840.2 ± 66.2 N; After: 751.6 ± 114.3 N, P = 0.04) and voluntary activation (Before: 85.9 ± 7.5%; After: 74.1 ± 12.3%, P = 0.04), however ball speed and accuracy during the finishing kicks were not significantly affected. Conclusion: Therefore, we conclude that despite the decline in running performance and neuromuscular variables presenting an important manifestation of central fatigue, this condition apparently does not affect the speed and accuracy of finishing kicks.
Collapse
Affiliation(s)
- Fabio Milioni
- Post Graduate Program in Movement Science, Department of Physical Education, UNESP - Univ Estadual Paulista Rio Claro, Brazil
| | - Luiz H P Vieira
- School of Physical Education and Sports of Ribeirão Preto, University of São PauloRibeirão Preto, Brazil; Post Graduate Program in Rehabilitation and Functional Performance, Faculty of Medicine at Ribeirão Preto, University of São PauloRibeirão Preto, Brazil
| | - Ricardo A Barbieri
- Post Graduate Program in Movement Science, Department of Physical Education, UNESP - Univ Estadual Paulista Rio Claro, Brazil
| | - Alessandro M Zagatto
- Post Graduate Program in Movement Science, Department of Physical Education, UNESP - Univ Estadual PaulistaRio Claro, Brazil; Department of Physical Education, UNESP - Univ Estadual PaulistaBauru, Brazil
| | - Nikolai B Nordsborg
- Department of Nutrition, Exercise and Sport, University of Copenhagen Copenhagen, Denmark
| | - Fabio A Barbieri
- Post Graduate Program in Movement Science, Department of Physical Education, UNESP - Univ Estadual PaulistaRio Claro, Brazil; Department of Physical Education, UNESP - Univ Estadual PaulistaBauru, Brazil
| | - Júlio W Dos-Santos
- Post Graduate Program in Movement Science, Department of Physical Education, UNESP - Univ Estadual PaulistaRio Claro, Brazil; Department of Physical Education, UNESP - Univ Estadual PaulistaBauru, Brazil
| | - Paulo R P Santiago
- School of Physical Education and Sports of Ribeirão Preto, University of São PauloRibeirão Preto, Brazil; Post Graduate Program in Rehabilitation and Functional Performance, Faculty of Medicine at Ribeirão Preto, University of São PauloRibeirão Preto, Brazil
| | - Marcelo Papoti
- Post Graduate Program in Movement Science, Department of Physical Education, UNESP - Univ Estadual PaulistaRio Claro, Brazil; School of Physical Education and Sports of Ribeirão Preto, University of São PauloRibeirão Preto, Brazil
| |
Collapse
|
7
|
Scaglioni G, Narici MV, Martin A. Neural Activation During Submaximal Contractions Seems More Reflective of Neuromuscular Ageing than Maximal Voluntary Activation. Front Aging Neurosci 2016; 8:19. [PMID: 26941638 PMCID: PMC4766308 DOI: 10.3389/fnagi.2016.00019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 01/26/2016] [Indexed: 11/24/2022] Open
Abstract
This study aimed at testing the hypothesis that differences in neural activation strategy during submaximal but not maximal plantarflexions exist between young and older men. Eleven young men (YM, 26 ± 4 years) and thirteen old men (OM, 76 ± 3 years) volunteered for the investigation. Maximal voluntary torque (MVT) was 38.2%, lower (p < 0.001) in OM than in YM, while voluntary activation was equivalent (~97%). The relationship between the interpolated twitch-torque and the voluntary torque (IT-VT relationship) was composite (curvilinear + exponential) for both age-groups. However, the OM showed accentuated concavity, as attested by the occurrence of the deviation from linearity at a lower contraction intensity (OM: 54.9 vs. YM: 71.9% MVT). In conclusion, ageing does not affect the capacity to fully activate the plantar flexors during maximal performances, but it alters the activation pattern for submaximal levels of effort. The greater age-related concavity of the IT-VT relationship suggests that, during submaximal contractions, OM need to reach a level of activation higher than YM to develop an equivalent relative torque.
Collapse
Affiliation(s)
- Gil Scaglioni
- Université de Bourgogne Franche-Comté (UBFC), Cognition Action et Plasticité Sensorimotrice (CAPS) UMR1093Dijon, France; Institut National de la Santé et de la Recherche Médicale (INSERM U1093), Cognition Action et Plasticité Sensorimotrice (CAPS) UMR1093Dijon, France
| | - Marco V Narici
- School of Graduate Entry to Medicine and Health, Faculty of Medicine, MRC-Arthritis Research UK Centre of Excellence for Musculoskeletal Ageing Research, University of Nottingham Derby, UK
| | - Alain Martin
- Université de Bourgogne Franche-Comté (UBFC), Cognition Action et Plasticité Sensorimotrice (CAPS) UMR1093Dijon, France; Institut National de la Santé et de la Recherche Médicale (INSERM U1093), Cognition Action et Plasticité Sensorimotrice (CAPS) UMR1093Dijon, France
| |
Collapse
|
8
|
Smith AC, Parrish TB, Hoggarth MA, McPherson JG, Tysseling VM, Wasielewski M, Kim HE, Hornby TG, Elliott JM. Potential associations between chronic whiplash and incomplete spinal cord injury. Spinal Cord Ser Cases 2015; 1. [PMID: 27630770 DOI: 10.1038/scsandc.2015.24] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
STUDY DESIGN This research utilized a cross-sectional design with control group inclusion. OBJECTIVES Preliminary evidence suggests that a portion of the patient population with chronic whiplash may have sustained spinal cord damage. Our hypothesis is that in some cases of chronic whiplash-associated disorders (WAD), observed muscle weakness in the legs will be associated with local signs of a partial spinal cord injury of the cervical spine. SETTING University based laboratory in Chicago, IL, USA. METHODS Five participants with chronic WAD were compared with five gender/age/height/weight/body mass index (BMI) control participants. For a secondary investigation, the chronic WAD group was compared with five unmatched participants with motor incomplete spinal cord injury (iSCI). Spinal cord motor tract integrity was assessed using magnetization transfer imaging. Muscle fat infiltration (MFI) was quantified using fat/water separation magnetic resonance imaging. Central volitional muscle activation of the plantarflexors was assessed using a burst superimposition technique. RESULTS We found reduced spinal cord motor tract integrity, increased MFI of the neck and lower extremity muscles and significantly impaired voluntary plantarflexor muscle activation in five participants with chronic WAD. The lower extremity structural changes and volitional weakness in chronic WAD were comparable to participants with iSCI. CONCLUSION The results support the position that a subset of the chronic whiplash population may have sustained partial damage to the spinal cord. SPONSORSHIP NIH R01HD079076-01A1, NIH T32 HD057845 and the Foundation for Physical Therapy Promotion of Doctoral Studies program.
Collapse
Affiliation(s)
- Andrew C Smith
- Northwestern University Interdepartmental Neuroscience Program, Chicago, IL USA; Northwestern University Department of Physical Therapy and Human Movement Sciences, Chicago, IL USA
| | - Todd B Parrish
- Northwestern University Department of Radiology, Chicago, IL USA
| | - Mark A Hoggarth
- Northwestern University Department of Physical Therapy and Human Movement Sciences, Chicago, IL USA
| | - Jacob G McPherson
- Florida International University Department of Biomedical Engineering, Miami, FL USA
| | - Vicki M Tysseling
- Northwestern University Department of Physical Therapy and Human Movement Sciences, Chicago, IL USA
| | - Marie Wasielewski
- Northwestern University Department of Physical Therapy and Human Movement Sciences, Chicago, IL USA
| | - Hyosub E Kim
- Rehabilitation Institute of Chicago, Chicago, IL USA
| | | | - James M Elliott
- Northwestern University Department of Physical Therapy and Human Movement Sciences, Chicago, IL USA
| |
Collapse
|
9
|
Neyroud D, Temesi J, Millet GY, Verges S, Maffiuletti NA, Kayser B, Place N. Comparison of electrical nerve stimulation, electrical muscle stimulation and magnetic nerve stimulation to assess the neuromuscular function of the plantar flexor muscles. Eur J Appl Physiol 2015; 115:1429-39. [DOI: 10.1007/s00421-015-3124-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Accepted: 02/03/2015] [Indexed: 01/15/2023]
|
10
|
Cattagni T, Scaglioni G, Laroche D, Van Hoecke J, Gremeaux V, Martin A. Ankle muscle strength discriminates fallers from non-fallers. Front Aging Neurosci 2014; 6:336. [PMID: 25566068 PMCID: PMC4271599 DOI: 10.3389/fnagi.2014.00336] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Accepted: 11/27/2014] [Indexed: 11/24/2022] Open
Abstract
It is well known that center of pressure (CoP) displacement correlates negatively with the maximal isometric torque (MIT) of ankle muscles. This relationship has never been investigated in elderly fallers (EF). The purpose of this study was thus to analyze the relationship between the MIT of ankle muscles and CoP displacement in upright stance in a sample aged between 18 and 90 years old that included EF. The aim was to identify a threshold of torque below which balance is compromised. The MIT of Plantar flexors (PFs) and dorsal flexors (DFs) and CoP were measured in 90 volunteers: 21 healthy young adults (YA) (age: 24.1 ± 5.0), 12 healthy middle-aged adults (MAA) (age: 50.2 ± 4.5), 27 healthy elderly non-fallers (ENF) (age: 75.5 ± 7.0) and 30 EF (age: 78.8 ± 6.7). The MIT of PF and DF were summed to obtain the overall maximal ankle muscle strength. Body weight and height were used to normalize MIT (nMIT) and CoP (nCoP), respectively. nCoP correlated negatively with nMIT. 90% of EF generated an nMIT <3.1 N·m·kg−1, whereas 85% of non-fallers generated an nMIT >3.1 N·m·kg−1. The relationship between nMIT and nCoP implies that ankle muscle weakness contributes to increased postural instability and the risk of falling. We observed that below the threshold of 3.1 N·m·kg−1, postural stability was dramatically diminished and balance was compromised. Our results suggest that measuring ankle torque could be used in routine clinical practice to identify potential fallers.
Collapse
Affiliation(s)
- Thomas Cattagni
- Faculté des sciences du sport—UFR STAPS, Université de BourgogneDijon, France
- INSERM unité 1093, Cognition, action et plasticité sensorimotriceDijon, France
- *Correspondence: Thomas Cattagni, Faculté des sciences du sport—UFR STAPS, Université de Bourgogne, Campus universitaire Montmuzard, BP 27 877 – 21078 Dijon, Cedex, France e-mail:
| | - Gil Scaglioni
- Faculté des sciences du sport—UFR STAPS, Université de BourgogneDijon, France
- INSERM unité 1093, Cognition, action et plasticité sensorimotriceDijon, France
| | - Davy Laroche
- INSERM unité 1093, Cognition, action et plasticité sensorimotriceDijon, France
- INSERM CIC 1432, Plateforme d’Investigation Technologique, CHU de DijonDijon, France
| | - Jacques Van Hoecke
- Faculté des sciences du sport—UFR STAPS, Université de BourgogneDijon, France
- INSERM unité 1093, Cognition, action et plasticité sensorimotriceDijon, France
| | - Vincent Gremeaux
- INSERM unité 1093, Cognition, action et plasticité sensorimotriceDijon, France
- INSERM CIC 1432, Plateforme d’Investigation Technologique, CHU de DijonDijon, France
- Pôle rééducation-réadaptation, CHU de DijonDijon, France
| | - Alain Martin
- Faculté des sciences du sport—UFR STAPS, Université de BourgogneDijon, France
- INSERM unité 1093, Cognition, action et plasticité sensorimotriceDijon, France
| |
Collapse
|
11
|
Marshall PWM, Lovell R, Jeppesen GK, Andersen K, Siegler JC. Hamstring muscle fatigue and central motor output during a simulated soccer match. PLoS One 2014; 9:e102753. [PMID: 25047547 PMCID: PMC4105441 DOI: 10.1371/journal.pone.0102753] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2014] [Accepted: 06/23/2014] [Indexed: 11/30/2022] Open
Abstract
Purpose To examine changes in hamstring muscle fatigue and central motor output during a 90-minute simulated soccer match, and the concomitant changes in hamstring maximal torque and rate of torque development. Method Eight amateur male soccer players performed a 90-minute simulated soccer match, with measures performed at the start of and every 15-minutes during each half. Maximal torque (Nm) and rate of torque development (RTD; Nm.s–1) were calculated from maximal isometric knee flexor contractions performed at 10° of flexion. Hamstring peripheral fatigue was assessed from changes in the size and shape of the resting twitch (RT). Hamstring central motor output was quantified from voluntary activation (%) and normalized biceps femoris (BF) and medial hamstrings (MH) electromyographic amplitudes (EMG/M). Results Maximal torque was reduced at 45-minutes by 7.6±9.4% (p<0.05). RTD in time intervals of 0–25, 0–50, and 0–75 ms post-contraction onset were reduced after 15-minutes in the first-half between 29.6 to 46.2% (p<0.05), and were further reduced at the end of the second-half (p<0.05). Maximal EMG/M was reduced for biceps femoris only concomitant to the time-course of reductions in maximal torque (p = 0.007). The rate of EMG rise for BF and MH was reduced in early time periods (0–75 ms) post-contraction onset (p<0.05). No changes were observed for the size and shape of the RT, indicating no hamstring peripheral fatigue. Conclusion Centrally mediated reductions in maximal torque and rate of torque development provide insight into factors that may explain hamstring injury risk during soccer. Of particular interest were early reductions during the first-half of hamstring rate of torque development, and the decline in maximal EMG/M of biceps femoris in the latter stages of the half. These are important findings that may help explain why the hamstrings are particularly vulnerable to strain injury during soccer.
Collapse
Affiliation(s)
- Paul W. M. Marshall
- School of Science and Health, University of Western Sydney, Sydney, Australia
- * E-mail:
| | - Ric Lovell
- School of Science and Health, University of Western Sydney, Sydney, Australia
| | | | | | - Jason C. Siegler
- School of Science and Health, University of Western Sydney, Sydney, Australia
| |
Collapse
|
12
|
Doix ACM, Matkowski B, Martin A, Roeleveld K, Colson SS. Effect of neuromuscular electrical stimulation intensity over the tibial nerve trunk on triceps surae muscle fatigue. Eur J Appl Physiol 2013; 114:317-29. [PMID: 24281826 DOI: 10.1007/s00421-013-2780-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Accepted: 11/18/2013] [Indexed: 11/24/2022]
Abstract
PURPOSE This study was designed to investigate whether the intensity modulation of a neuromuscular electrical stimulation (NMES) protocol delivered over the nerve trunk of the plantar flexors would lead to differential peripheral and central contributions of muscle fatigue. METHODS Three fatiguing isometric protocols of the plantar flexors matched for the same amount of isometric torque-time integral (TTI) were randomly performed including a volitional protocol at 20 % of the maximal voluntary contraction (MVC) and two NMES protocols (one at constant intensity, CST; the other at intensity level progressively adjusted to maintain 20 % of MVC, PROG). RESULTS No time x protocol interaction was found for any of the variables. The MVC decreased similarly (≈12 %, p < 0.001) after all protocols, so did the potentiated twitch responses (p = 0.001). Although voluntary activation of the plantar flexors did not change, maximal H-reflex to M-wave ratio of the soleus (SOL) and the gastrocnemius medialis (GM) muscles showed an overall increase (SOL: p = 0.037, GM: p = 0.041), while it remained stable for the gastrocnemius lateralis muscle (p = 0.221). A main time effect was observed only for the SOL maximal V-wave to the superimposed M-wave ratio (p = 0.024) and to the superimposed H-reflex (p = 0.008). While similar central and peripheral adaptations were observed after the three fatiguing protocols, the individual contribution of the three different triceps surae muscles was different. CONCLUSION Whether the current intensity was increased or not, the adaptations after a NMES protocol yield to similar muscle fatigue adaptations as voluntary contractions likely through similar pathways matching a similar TTI.
Collapse
Affiliation(s)
- Aude-Clémence M Doix
- University of Nice-Sophia Antipolis, Laboratory of Human Motricity Education Sport and Health (EA 6309), Faculty of Sport Sciences, 261, route de Grenoble B.P. 32 59, 06205, Nice Cedex 03, France,
| | | | | | | | | |
Collapse
|
13
|
Fatiguing handgrip exercise alters maximal force-generating capacity of plantar-flexors. Eur J Appl Physiol 2012; 113:559-66. [PMID: 22833010 DOI: 10.1007/s00421-012-2462-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Accepted: 07/11/2012] [Indexed: 10/27/2022]
Abstract
Exercise-induced fatigue causes changes within the central nervous system that decrease force production capacity in fatigued muscles. The impact on unrelated, non-exercised muscle performance is still unclear. The primary aim of this study was to examine the impact of a bilateral forearm muscle contraction on the motor function of the distal and unrelated ankle plantar-flexor muscles. The secondary aim was to compare the impact of maximal and submaximal forearm contractions on the non-fatigued ankle plantar-flexor muscles. Maximal voluntary contractions (MVC) of the forearm and ankle plantar-flexor muscles as well as voluntary activation (VA) and twitch torque of the ankle plantar-flexor muscles were assessed pre-fatigue and throughout a 10-min recovery period. Maximal (100 % MVC) and submaximal (30 % MVC) sustained isometric handgrip contractions caused a decreased handgrip MVC (to 49.3 ± 15.4 and 45.4 ± 11.4 % of the initial MVC for maximal and submaximal contraction, respectively) that remained throughout the 10-min recovery period. The fatigue protocols also caused a decreased ankle plantar-flexor MVC (to 77 ± 8.3 and 92.4 ± 6.2 % of pre-fatigue MVC for maximal and submaximal contraction, respectively) and VA (to 84.3 ± 15.7 and 97.7 ± 16.1 % of pre-fatigue VA for maximal and submaximal contraction, respectively). These results suggest central fatigue created by the fatiguing handgrip contraction translated to the performance of the non-exercised ankle muscles. Our results also show that the maximal fatigue protocol affected ankle plantar-flexor MVC and VA more severely than the submaximal protocol, highlighting the task-specificity of neuromuscular fatigue.
Collapse
|
14
|
Van Leeuwen DM, De Ruiter CJ, De Haan A. Effect of stimulation intensity on assessment of voluntary activation. Muscle Nerve 2012; 45:841-8. [DOI: 10.1002/mus.23343] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
15
|
Kennedy A, Hug F, Bilodeau M, Sveistrup H, Guével A. Neuromuscular fatigue induced by alternating isometric contractions of the ankle plantar and dorsiflexors. J Electromyogr Kinesiol 2011; 21:471-7. [PMID: 21376628 DOI: 10.1016/j.jelekin.2011.02.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2010] [Revised: 02/03/2011] [Accepted: 02/03/2011] [Indexed: 11/19/2022] Open
Abstract
Ankle muscle activity is important in regulating postural control as well as more complex movement tasks. Fatigue of these muscles clearly influences postural stability; however, the mechanisms responsible for this change have not been well characterized. In this study the fatigue produced in the plantar (PF) and dorsiflexors (DF) during intermittent, isometric contractions was examined and the recovery process was monitored for ten minutes post-fatigue. Fifteen healthy participants alternated between isometric PF and DF contractions until the torque was reduced to >50% of the pre-fatigue maximal voluntary contraction level in both directions. Peripheral fatigue was identified by measuring the change in the twitch torque and M-wave amplitude pre and post-fatigue. Central fatigue was determined by comparing the level of voluntary activation in the PF and DF between pre and post-fatigue. The fatigue protocol decreased the torque production in PF and DF to similar levels; however, the characteristics and recovery of the fatigue were different for the two muscle groups. This study demonstrates that although the torque produced by two antagonist muscles can be reduced to the same level, the mechanisms responsible for this change may not be similar and therefore may not impact motor tasks in the same way.
Collapse
Affiliation(s)
- Ashleigh Kennedy
- Schools of Rehabilitation Sciences and Human Kinetics, Faculty of Health Sciences, University of Ottawa, Ottawa, ON, Canada
| | | | | | | | | |
Collapse
|
16
|
Tillin NA, Pain MT, Folland JP. Short-term unilateral resistance training affects the agonist-antagonist but not the force-agonist activation relationship. Muscle Nerve 2011; 43:375-84. [DOI: 10.1002/mus.21885] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
17
|
Berger MJ, Watson BV, Doherty TJ. Effect of maximal voluntary contraction on the amplitude of the compound muscle action potential: Implications for the interpolated twitch technique. Muscle Nerve 2010; 42:498-503. [DOI: 10.1002/mus.21692] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|