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Rosahl SC, Rauschendorfer P, Arndt L, Voigtmann T, Mittag U, Rittweger J. Ex-vivo validation of spatial gain sonography for the quantification of echo intensity in fascicle-aligned ultrasound images in ten anatomical muscles in Bos taurus. Sci Rep 2024; 14:3808. [PMID: 38360989 PMCID: PMC10869723 DOI: 10.1038/s41598-024-53852-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Accepted: 02/06/2024] [Indexed: 02/17/2024] Open
Abstract
This study aimed to validate the concept of spatial gain sonography for quantifying texture-related echo intensity in B-mode ultrasound of skeletal muscle. Fifty-one bovine muscles were scanned postmortem using B-mode ultrasonography at varying fascicle probe angles (FPA). The relationship between mean gray values (MGV) and FPA was fitted with a sinusoidal and a linear function, the slope of which was defined as tilt echo gain (TEG). Macroscopic muscle cross sections were optically analyzed for intramuscular connective tissue (IMCT) content which was plotted against MGV at 0° FPA (MGV_00). MGV peaked at FPA 0°. Sine fits were superior to linear fits (adjusted r2-values 0.647 vs. 0.613), especially for larger FPAs. In mixed models, the pennation angle was related to TEG (P < 0.001) and MGV_00 (P = 0.035). Age was relevant for MGV_00 (P < 0.001), but not TEG (P > 0.10). The correlation between the IMCT percentage and MGV_00 was significant but weak (P = 0.026; adjusted r2 = 0.103). The relationship between fascicle probe angle and echo intensity in B-mode ultrasound can be modeled more accurately with a sinusoidal but more practically for clinical use with a linear fit. The peak mean gray value MGV_00 can be used to compare echo intensity across muscles without the bias of pennation angle.
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Affiliation(s)
- Sophie C Rosahl
- Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany.
| | | | - Lukas Arndt
- Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany
| | - Thomas Voigtmann
- Institute of Material Physics in Space, German Aerospace Center (DLR), Cologne, Germany
- Institute of Theoretical Physics, Heinrich-Heine-Universität, Düsseldorf, Germany
| | - Uwe Mittag
- Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany
| | - Jörn Rittweger
- Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany
- Department of Pediatrics and Adolescent Medicine, University Hospital Cologne, Cologne, Germany
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Grassi M, Von Der Straten F, Pearce C, Lee J, Mider M, Mittag U, Sies W, Mulder E, Daumer M, Rittweger J. Changes in real-world walking speed following 60-day bed-rest. NPJ Microgravity 2024; 10:6. [PMID: 38216584 PMCID: PMC10786829 DOI: 10.1038/s41526-023-00342-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 12/11/2023] [Indexed: 01/14/2024] Open
Abstract
The aim of this work was to explore whether real-world walking speed (RWS) would change as a consequence of 60-day bed-rest. The main hypothesis was that daily RWS would decrease after the bed-rest, with a subsequent recovery during the first days of re-ambulation. Moreover, an exploratory analysis was done in order to understand whether there is an agreement between the loss in RWS after bed-rest and the loss in the maximum oxygen uptake capacity (VO2max), or the loss in maximal vertical jump power (JUMP) respectively. Twenty-four subjects were randomly assigned to one of three groups: a continuous artificial gravity group, an intermittent artificial gravity group, or a control group. The fitted linear mixed effects model showed a significant decrease (p < 0.001) of RWS after the 60-day bed-rest and a subsequent increase (p < 0.001) of RWS during the 14-day recovery period in the study facility. No or little agreement was found between the loss in RWS and the loss in VO2max capacity or the loss in maximal vertical jumping power (RWS vs. VO2max: p = 0.81, RWS vs. JUMP: p = 0.173). Decreased RWS after bed-rest, with a follow-up recovery was observed for all three groups, regardless of the training intervention. This suggests that RWS, also in these settings, was able to reflect a de-conditioning and follow-up recovery process.
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Affiliation(s)
- Marcello Grassi
- Sylvia Lawry Center for Multiple Sclerosis Research e.V., Munich, Germany
- Institute of Aerospace Medicine, Department of Muscle and Bone Metabolism, German Aerospace Center, Cologne, Germany
| | - Fiona Von Der Straten
- TUM School for Computation, Information and Technology, Technical University of Munich, Munich, Germany
| | - Charlotte Pearce
- TUM School for Computation, Information and Technology, Technical University of Munich, Munich, Germany
| | - Jessica Lee
- Institute of Aerospace Medicine, Department of Muscle and Bone Metabolism, German Aerospace Center, Cologne, Germany
| | | | - Uwe Mittag
- Institute of Aerospace Medicine, Department of Muscle and Bone Metabolism, German Aerospace Center, Cologne, Germany
| | - Wolfram Sies
- Institute of Aerospace Medicine, Department of Muscle and Bone Metabolism, German Aerospace Center, Cologne, Germany
| | - Edwin Mulder
- Institute of Aerospace Medicine, Department of Muscle and Bone Metabolism, German Aerospace Center, Cologne, Germany
| | - Martin Daumer
- Sylvia Lawry Center for Multiple Sclerosis Research e.V., Munich, Germany
- TUM School for Computation, Information and Technology, Technical University of Munich, Munich, Germany
- Trium Analysis Online GmbH, Munich, Germany
| | - Jörn Rittweger
- Institute of Aerospace Medicine, Department of Muscle and Bone Metabolism, German Aerospace Center, Cologne, Germany.
- Department of Pediatrics and Adolescent Medicine, University Hospital Cologne, Cologne, Germany.
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Muanjai P, Haas C, Sies W, Mittag U, Zange J, Schönau E, Duran I, Kamandulis S, Rittweger J. Effect of Whole-body Vibration frequency on muscle tensile state during graded plantar flexor isometric contractions. J Exerc Sci Fit 2023; 21:405-415. [PMID: 37965131 PMCID: PMC10641229 DOI: 10.1016/j.jesf.2023.10.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 10/12/2023] [Accepted: 10/24/2023] [Indexed: 11/16/2023] Open
Abstract
Background Acute physiological and biomechanical alterations have been reported following whole-body vibration (WBV). Stiffening of muscles has only been anecdotally reported in response to WBV. Accordingly, this study investigated active plantar flexor muscle stiffness in response to a single WBV bout at four mechanical vibration frequencies. Methods Thirteen healthy adults (37.1 ± 14.4 years old) randomly received WBV in 4 different frequencies (6, 12, 24, and 0 Hz control) for 5 min. Shear wave speed (SWS) in longitudinal and transverse projections, architecture, and electric muscle activity were recorded in the medial gastrocnemius (MG) and soleus (SOL) muscle during graded plantar flexor contraction. Subjective rating of perceived muscle stiffness was assessed via Likert-scale. Results SWS of the MG at rest was enhanced in response to 5 min of 24 Hz WBV (p = 0.025), while a small reduction in SOL SWS was found during contraction (p = 0.005) in the longitudinal view. Subjective stiffness rating was increased following 12 Hz intervention. After 24 Hz WBV, pennation angle for MG was decreased (p = 0.011) during contraction. As a secondary finding, plantar flexor strength was significantly increased with each visit, which, however, did not affect the study's main outcome because of balanced sequence allocation. Conclusion SWS effects were solely limited to 24 Hz mechanical vibration and in the longitudinal projection. The observed effects are compatible with an interpretation by post-activation potentiation, warm-up, and force-distribution within the triceps surae muscles following 5 min WBV. The outcome may suggest SWS as a useful tool for assessing acute changes in muscle stiffness.
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Affiliation(s)
- Pornpimol Muanjai
- Department of Physical Therapy, Allied Health Sciences Faculty, Burapha University, Chonburi, Thailand
- Exercise and Nutrition Innovation and Sciences Research Unit, Burapha University, Chonburi, Thailand
| | - Chris Haas
- University of Texas Medical Branch, Galveston, TX, USA
| | - Wolfram Sies
- Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany
| | - Uwe Mittag
- Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany
| | - Jochen Zange
- Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany
| | - Eckhard Schönau
- Center of Prevention and Rehabilitation, Cologne University Hospital and Medical Faculty, Germany
- Department of Pediatrics and Adolescent Medicine, University of Cologne, Cologne, Germany
| | - Ibrahim Duran
- Center of Prevention and Rehabilitation, Cologne University Hospital and Medical Faculty, Germany
| | - Sigitas Kamandulis
- Institute of Sport Science and Innovations, Lithuanian Sports University, Kaunas, Lithuania
| | - Jörn Rittweger
- Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany
- Department of Pediatrics and Adolescent Medicine, University of Cologne, Cologne, Germany
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Heieis J, Böcker J, D'Angelo O, Mittag U, Albracht K, Schönau E, Meyer A, Voigtmann T, Rittweger J. Curvature of gastrocnemius muscle fascicles as function of muscle-tendon complex length and contraction in humans. Physiol Rep 2023; 11:e15739. [PMID: 37269183 DOI: 10.14814/phy2.15739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 05/17/2023] [Accepted: 05/17/2023] [Indexed: 06/04/2023] Open
Abstract
It has been shown that muscle fascicle curvature increases with increasing contraction level and decreasing muscle-tendon complex length. The analyses were done with limited examination windows concerning contraction level, muscle-tendon complex length, and/or intramuscular position of ultrasound imaging. With this study we aimed to investigate the correlation between fascicle arching and contraction, muscle-tendon complex length and their associated architectural parameters in gastrocnemius muscles to develop hypotheses concerning the fundamental mechanism of fascicle curving. Twelve participants were tested in five different positions (90°/105°*, 90°/90°*, 135°/90°*, 170°/90°*, and 170°/75°*; *knee/ankle angle). They performed isometric contractions at four different contraction levels (5%, 25%, 50%, and 75% of maximum voluntary contraction) in each position. Panoramic ultrasound images of gastrocnemius muscles were collected at rest and during constant contraction. Aponeuroses and fascicles were tracked in all ultrasound images and the parameters fascicle curvature, muscle-tendon complex strain, contraction level, pennation angle, fascicle length, fascicle strain, intramuscular position, sex and age group were analyzed by linear mixed effect models. Mean fascicle curvature of the medial gastrocnemius increased with contraction level (+5 m-1 from 0% to 100%; p = 0.006). Muscle-tendon complex length had no significant impact on mean fascicle curvature. Mean pennation angle (2.2 m-1 per 10°; p < 0.001), inverse mean fascicle length (20 m-1 per cm-1 ; p = 0.003), and mean fascicle strain (-0.07 m-1 per +10%; p = 0.004) correlated with mean fascicle curvature. Evidence has also been found for intermuscular, intramuscular, and sex-specific intramuscular differences of fascicle curving. Pennation angle and the inverse fascicle length show the highest predictive capacities for fascicle curving. Due to the strong correlations between pennation angle and fascicle curvature and the intramuscular pattern of curving we suggest for future studies to examine correlations between fascicle curvature and intramuscular fluid pressure.
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Affiliation(s)
- Jule Heieis
- Institute of Aerospace Medicine, German Aerospace Center, Cologne, Germany
- Faculty of Medical Engineering and Technomathematics, FH Aachen University of Applied Science, Aachen, Germany
- Children's Hospital, University of Cologne, Cologne, Germany
| | - Jonas Böcker
- Institute of Aerospace Medicine, German Aerospace Center, Cologne, Germany
| | - Olfa D'Angelo
- Institute of Materials Physics in Space, German Aerospace Center, Cologne, Germany
| | - Uwe Mittag
- Institute of Aerospace Medicine, German Aerospace Center, Cologne, Germany
| | - Kirsten Albracht
- Faculty of Medical Engineering and Technomathematics, FH Aachen University of Applied Science, Aachen, Germany
| | - Eckhard Schönau
- Children's Hospital, University of Cologne, Cologne, Germany
| | - Andreas Meyer
- Institute of Materials Physics in Space, German Aerospace Center, Cologne, Germany
| | - Thomas Voigtmann
- Institute of Materials Physics in Space, German Aerospace Center, Cologne, Germany
| | - Jörn Rittweger
- Institute of Aerospace Medicine, German Aerospace Center, Cologne, Germany
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Scorcelletti M, Zange J, Böcker J, Sies W, Lau P, Mittag U, Reeves ND, Ireland A, Rittweger J. Associations between long-term exercise participation and lower limb joint and whole-bone geometry in young and older adults. Front Physiol 2023; 14:1150562. [PMID: 37250122 PMCID: PMC10211427 DOI: 10.3389/fphys.2023.1150562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Accepted: 04/24/2023] [Indexed: 05/31/2023] Open
Abstract
Introduction: Features of lower limb bone geometry are associated with movement kinematics and clinical outcomes including fractures and osteoarthritis. Therefore, it is important to identify their determinants. Lower limb geometry changes dramatically during development, partly due to adaptation to the forces experienced during physical activity. However, the effects of adulthood physical activity on lower limb geometry, and subsequent associations with muscle function are relatively unexplored. Methods: 43 adult males were recruited; 10 young (20-35 years) trained i.e., regional to world-class athletes, 12 young sedentary, 10 older (60-75 years) trained and 11 older sedentary. Skeletal hip and lower limb geometry including acetabular coverage and version angle, total and regional femoral torsion, femoral and tibial lateral and frontal bowing, and frontal plane lower limb alignment were assessed using magnetic resonance imaging. Muscle function was assessed recording peak power and force of jumping and hopping using mechanography. Associations between age, training status and geometry were assessed using multiple linear regression, whilst associations between geometry and muscle function were assessed by linear mixed effects models with adjustment for age and training. Results: Trained individuals had 2° (95% CI:0.6°-3.8°; p = 0.009) higher femoral frontal bowing and older individuals had 2.2° (95% CI:0.8°-3.7°; p = 0.005) greater lateral bowing. An age-by-training interaction indicated 4° (95% CI:1.4°-7.1°; p = 0.005) greater acetabular version angle in younger trained individuals only. Lower limb geometry was not associated with muscle function (p > 0.05). Discussion: The ability to alter skeletal geometry via exercise in adulthood appears limited, especially in epiphyseal regions. Furthermore, lower limb geometry does not appear to be associated with muscle function.
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Affiliation(s)
- Matteo Scorcelletti
- Research Centre for Musculoskeletal Science and Sports Medicine, Department of Life Sciences, Faculty of Science and Engineering, Manchester Metropolitan University, Manchester, United Kingdom
- Manchester Metropolitan University Institute of Sport, Manchester, United Kingdom
- Werner Siemens-Endowed Chair for Innovative Implant Development (Fracture Healing), Division of Surgery, Saarland University, Homburg, Germany
| | - Jochen Zange
- Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany
| | - Jonas Böcker
- Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany
| | - Wolfram Sies
- Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany
| | - Patrick Lau
- Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany
| | - Uwe Mittag
- Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany
| | - Neil D. Reeves
- Research Centre for Musculoskeletal Science and Sports Medicine, Department of Life Sciences, Faculty of Science and Engineering, Manchester Metropolitan University, Manchester, United Kingdom
- Manchester Metropolitan University Institute of Sport, Manchester, United Kingdom
| | - Alex Ireland
- Research Centre for Musculoskeletal Science and Sports Medicine, Department of Life Sciences, Faculty of Science and Engineering, Manchester Metropolitan University, Manchester, United Kingdom
- Manchester Metropolitan University Institute of Sport, Manchester, United Kingdom
| | - Jörn Rittweger
- Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany
- Department of Paediatrics and Adolescent Medicine, University of Cologne, Cologne, Germany
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Rittweger J, Gilardi L, Baltruweit M, Dally S, Erbertseder T, Mittag U, Naeem M, Schmid M, Schmitz MT, Wüst S, Dech S, Jordan J, Antoni T, Bittner M. Temperature and particulate matter as environmental factors associated with seasonality of influenza incidence - an approach using Earth observation-based modeling in a health insurance cohort study from Baden-Württemberg (Germany). Environ Health 2022; 21:131. [PMID: 36527040 PMCID: PMC9755806 DOI: 10.1186/s12940-022-00927-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 10/21/2022] [Indexed: 05/04/2023]
Abstract
BACKGROUND Influenza seasonality has been frequently studied, but its mechanisms are not clear. Urban in-situ studies have linked influenza to meteorological or pollutant stressors. Few studies have investigated rural and less polluted areas in temperate climate zones. OBJECTIVES We examined influences of medium-term residential exposure to fine particulate matter (PM2.5), NO2, SO2, air temperature and precipitation on influenza incidence. METHODS To obtain complete spatial coverage of Baden-Württemberg, we modeled environmental exposure from data of the Copernicus Atmosphere Monitoring Service and of the Copernicus Climate Change Service. We computed spatiotemporal aggregates to reflect quarterly mean values at post-code level. Moreover, we prepared health insurance data to yield influenza incidence between January 2010 and December 2018. We used generalized additive models, with Gaussian Markov random field smoothers for spatial input, whilst using or not using quarter as temporal input. RESULTS In the 3.85 million cohort, 513,404 influenza cases occurred over the 9-year period, with 53.6% occurring in quarter 1 (January to March), and 10.2%, 9.4% and 26.8% in quarters 2, 3 and 4, respectively. Statistical modeling yielded highly significant effects of air temperature, precipitation, PM2.5 and NO2. Computation of stressor-specific gains revealed up to 3499 infections per 100,000 AOK clients per year that are attributable to lowering ambient mean air temperature from 18.71 °C to 2.01 °C. Stressor specific gains were also substantial for fine particulate matter, yielding up to 502 attributable infections per 100,000 clients per year for an increase from 7.49 μg/m3 to 15.98 μg/m3. CONCLUSIONS Whilst strong statistical association of temperature with other stressors makes it difficult to distinguish between direct and mediated temperature effects, results confirm genuine effects by fine particulate matter on influenza infections for both rural and urban areas in a temperate climate. Future studies should attempt to further establish the mediating mechanisms to inform public health policies.
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Affiliation(s)
- Jörn Rittweger
- Institute of Aerospace Medicine, German Aerospace Center (DLR), 51147, Cologne, Germany.
- Department of Pediatrics and Adolescent Medicine, University Hospital Cologne, Cologne, Germany.
| | - Lorenza Gilardi
- German Remote Sensing Data Center, German Aerospace Center (DLR), Oberpfaffenhofen, Germany
| | - Maxana Baltruweit
- Allgemeine Ortskrankenkasse Baden-Württemberg (AOK-BW), Stuttgart, Germany
| | - Simon Dally
- Allgemeine Ortskrankenkasse Baden-Württemberg (AOK-BW), Stuttgart, Germany
| | - Thilo Erbertseder
- German Remote Sensing Data Center, German Aerospace Center (DLR), Oberpfaffenhofen, Germany
| | - Uwe Mittag
- Institute of Aerospace Medicine, German Aerospace Center (DLR), 51147, Cologne, Germany
| | - Muhammad Naeem
- Kohat University of Science and Technology, Kohat, Pakistan
| | - Matthias Schmid
- Institute of Medical Biometry, Informatics and Epidemiology, University Hospital Bonn, Bonn, Germany
| | - Marie-Therese Schmitz
- Institute of Aerospace Medicine, German Aerospace Center (DLR), 51147, Cologne, Germany
- Institute of Medical Biometry, Informatics and Epidemiology, University Hospital Bonn, Bonn, Germany
| | - Sabine Wüst
- German Remote Sensing Data Center, German Aerospace Center (DLR), Oberpfaffenhofen, Germany
| | - Stefan Dech
- German Remote Sensing Data Center, German Aerospace Center (DLR), Oberpfaffenhofen, Germany
| | - Jens Jordan
- Institute of Aerospace Medicine, German Aerospace Center (DLR), 51147, Cologne, Germany
- Medical Faculty, University of Cologne, Cologne, Germany
| | - Tobias Antoni
- Allgemeine Ortskrankenkasse Baden-Württemberg (AOK-BW), Stuttgart, Germany
| | - Michael Bittner
- German Remote Sensing Data Center, German Aerospace Center (DLR), Oberpfaffenhofen, Germany
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Böcker J, Schmitz MT, Mittag U, Jordan J, Rittweger J. Corrigendum: Between-Subject and Within-Subject Variation of Muscle Atrophy and Bone Loss in Response to Experimental Bed Rest. Front Physiol 2022; 13:913252. [PMID: 35634150 PMCID: PMC9135043 DOI: 10.3389/fphys.2022.913252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 04/25/2022] [Indexed: 11/13/2022] Open
Affiliation(s)
- Jonas Böcker
- Department of Muscle and Bone Metabolism, German Aerospace Center, Institute of Aerospace Medicine, Cologne, Germany
- *Correspondence: Jonas Böcker,
| | - Marie-Therese Schmitz
- Department of Muscle and Bone Metabolism, German Aerospace Center, Institute of Aerospace Medicine, Cologne, Germany
- Institute of Medical Biometry, Informatics and Epidemiology (IMBIE), University Hospital Bonn, Bonn, Germany
| | - Uwe Mittag
- Department of Muscle and Bone Metabolism, German Aerospace Center, Institute of Aerospace Medicine, Cologne, Germany
| | - Jens Jordan
- Chair of Aerospace Medicine, University of Cologne, Cologne, Germany
- German Aerospace Center, Head of Institute of Aerospace Medicine, Cologne, Germany
| | - Jörn Rittweger
- Department of Muscle and Bone Metabolism, German Aerospace Center, Institute of Aerospace Medicine, Cologne, Germany
- Department of Pediatrics and Adolescent Medicine, University Hospital of Cologne, Cologne, Germany
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Böcker J, Schmitz MT, Mittag U, Jordan J, Rittweger J. Between-Subject and Within-Subject Variaton of Muscle Atrophy and Bone Loss in Response to Experimental Bed Rest. Front Physiol 2022; 12:743876. [PMID: 35273514 PMCID: PMC8902302 DOI: 10.3389/fphys.2021.743876] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 12/30/2021] [Indexed: 01/22/2023] Open
Abstract
To improve quantification of individual responses to bed rest interventions, we analyzed peripheral quantitative computer tomography (pQCT) datasets of the lower leg of 76 participants, who took part in eight different bed rest studies. A newly developed statistical approach differentiated measurement uncertainty UMeas from between-subject-variation (BSV) and within-subject variation (WSV). The results showed that UMeas decreased 59.3% to 80% over the two decades of bed rest studies (p < 0.01), and that it was higher for muscles than for bones. The reduction of UMeas could be explained by improved measurement procedures as well as a higher standardization. The vast majority (82.6%) of the individual responses pci exceeded the 95% confidence interval defined by UMeas, indicating significant and substantial BSV, which was greater for bones than for muscles, especially at the epiphyseal measurement sites. Non-significant to small positive inter-site correlations between bone sites, but very large positive inter-site correlation between muscle sites suggests that substantial WSV exists in the tibia bone, but much less so in the calf musculature. Furthermore, endocortical circumference, an indicator of the individual’s bone geometry could partly explain WSV and BSV. These results demonstrate the existence of substantial BSV bone, and that it is partly driven by WSV, and likely also by physical activity and dietary habits prior to bed rest. In addition, genetic and epigenetic variation could potentially explain BSV, but not WSV. As to the latter, differences of bone characteristics and the bone resorption process could offer an explanation for its existence. The study has also demonstrated the importance of duplicate baseline measurements. Finally, we provide here a rationale for worst case scenarios with partly effective countermeasures in long-term space missions.
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Affiliation(s)
- Jonas Böcker
- Department of Muscle and Bone Metabolism, German Aerospace Center, Institute of Aerospace Medicine, Cologne, Germany
- *Correspondence: Jonas Böcker,
| | - Marie-Therese Schmitz
- Department of Muscle and Bone Metabolism, German Aerospace Center, Institute of Aerospace Medicine, Cologne, Germany
- Institute of Medical Biometry, Informatics and Epidemiology (IMBIE), University Hospital Bonn, Bonn, Germany
| | - Uwe Mittag
- Department of Muscle and Bone Metabolism, German Aerospace Center, Institute of Aerospace Medicine, Cologne, Germany
| | - Jens Jordan
- Chair of Aerospace Medicine, University of Cologne, Cologne, Germany
- German Aerospace Center, Head of Institute of Aerospace Medicine, Cologne, Germany
| | - Jörn Rittweger
- Department of Muscle and Bone Metabolism, German Aerospace Center, Institute of Aerospace Medicine, Cologne, Germany
- Department of Pediatrics and Adolescent Medicine, University Hospital of Cologne, Cologne, Germany
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Ireland A, Mittag U, Degens H, Felsenberg D, Heinonen A, Koltai E, Korhonen MT, McPhee JS, Mekjavic I, Pisot R, Rawer R, Radak Z, Simunic B, Suominen H, Rittweger J. Age-Related Declines in Lower Limb Muscle Function are Similar in Power and Endurance Athletes of Both Sexes: A Longitudinal Study of Master Athletes. Calcif Tissue Int 2022; 110:196-203. [PMID: 34505170 PMCID: PMC8784358 DOI: 10.1007/s00223-021-00907-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 08/18/2021] [Indexed: 11/28/2022]
Abstract
The age-related decline in muscle function, particularly muscle power, is associated with increased risk of important clinical outcomes. Physical activity is an important determinant of muscle function, and different types of physical activity e.g. power-based versus endurance-based exercise appear to have differential effects on muscle power. Cross-sectional studies suggest that participation in power-based exercise is associated with greater muscle power across adulthood but this has not been investigated longitudinally. We recruited eighty-nine male and female power and endurance master athletes (sprint and distance runners respectively, baseline age 35-90y). Using jumping mechanography, we measured lower limb muscle function during a vertical jump including at least two testing sessions longitudinally over 4.5 ± 2.4y. We examined effects of time, discipline (power/endurance) and sex in addition to two- and three-way interactions using linear mixed-effects models. Peak relative power, relative force and jump height, but not Esslingen Fitness Index (indicating peak power relative to sex and age-matched reference data) declined with time. Peak power, force, height and EFI were greater in power than endurance athletes. There were no sex, discipline or sex*discipline interactions with time for any variable, suggesting that changes were similar over time for athletes of both sexes and disciplines. Advantages in lower limb muscle function in power athletes were maintained with time, in line with previous cross-sectional studies. These results suggest that improvements in lower limb function in less active older individuals following power-based training persist with continued adherence, although this requires further investigation in interventional studies.
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Affiliation(s)
- Alex Ireland
- Department of Life Sciences, Musculoskeletal Science and Sports Medicine Research Centre, Manchester Metropolitan University, John Dalton Building, Chester Street, Manchester, M1 5GD, UK.
| | - Uwe Mittag
- Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany
| | - Hans Degens
- Department of Life Sciences, Musculoskeletal Science and Sports Medicine Research Centre, Manchester Metropolitan University, John Dalton Building, Chester Street, Manchester, M1 5GD, UK
- Lithuanian Sports University, Kaunas, Lithuania
- University of Medicine and Pharmacy of Târgu Mureș, Târgu Mureș, Rumania
| | - Dieter Felsenberg
- Private Praxis ´Osteology and Orphane Bone Diseases´ and Charité - Campus Benjamin Franklin, Centre of Muscle and Bone Research, Humboldt-University Berlin and Free University, Berlin, Germany
| | - Ari Heinonen
- Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
| | - Erika Koltai
- Research Institute of Sport Science, University of Physical Education, Budapest, Hungary
| | - Marko T Korhonen
- Gerontology Research Center, Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
| | - Jamie S McPhee
- Department of Sport and Exercise Sciences, Musculoskeletal Science and Sports Medicine Research Centre, Manchester Metropolitan University, Manchester, UK
| | - Igor Mekjavic
- Department of Automation, Biocybernetics and Robotics, Jozef Stefan Institute, Ljubljana, Slovenia
- Department of Biomedical Physiology and Kinesiology, Simon Fraser University, Burnaby, BC, Canada
| | - Rado Pisot
- Science and Research Centre Koper, Institute for Kinesiology Research, Koper, Slovenia
| | | | - Zsolt Radak
- Research Institute of Sport Science, University of Physical Education, Budapest, Hungary
| | - Bostjan Simunic
- Science and Research Centre Koper, Institute for Kinesiology Research, Koper, Slovenia
| | - Harri Suominen
- Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
| | - Jörn Rittweger
- Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany
- Department of Pediatrics and Adolescent Medicine, University of Cologne, Cologne, Germany
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10
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Alvero-Cruz JR, Brikis M, Chilibeck P, Frings-Meuthen P, Vico Guzmán JF, Mittag U, Michely S, Mulder E, Tanaka H, Tank J, Rittweger J. Age-Related Decline in Vertical Jumping Performance in Masters Track and Field Athletes: Concomitant Influence of Body Composition. Front Physiol 2021; 12:643649. [PMID: 33868010 PMCID: PMC8047469 DOI: 10.3389/fphys.2021.643649] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 03/09/2021] [Indexed: 12/30/2022] Open
Abstract
Vertical jumping power declines with advancing age, which is theoretically explicable by loss of muscle mass and increases in body fat. However, the results of previous cross-sectional studies remain inconsistent on these relationships. The present study included 256 masters athletes who competed at the 2018 track and field world championships in Málaga, Spain. We assessed body composition with bioelectrical impedance (Inbody S10) and vertical jumping power with a Leonardo ground reaction force platform. Relationships between age, jumping power, and body composition were analyzed by correlation and regression analyses. Hierarchical multiple regression analysis was used to evaluate effects of each factor on vertical jumping power. Age-related rates of decreases in maximal power and jump height were similar between male and female athletes. Percent fat-free mass and percent body fat were negatively and positively, respectively, associated with age in masters athletes and were comparable to those previously observed in the general population. Moreover, these effects in body composition can, to a great extent, explain the age-related decline in jumping power, an effect that seems at least partly independent of age. Finally, the multiple regression model to determine independent predictors of vertical jump performance yielded an overall R2 value of 0.75 with the inclusion of (1) athletic specialization in power events, (2) percent fat-free mass, and (3) phase angle. However, partial regression yielded significant effects of age, but not gender, on peak power, even when adjusting for athletic specialization, percent fat-free mass, and phase angle. We concluded that loss of skeletal muscle mass and changes in bio-impedance phase angle are important contributors to the age-related reduction in anaerobic power, even in adults who maintain high levels of physical activity into old age. However, age per se remains a significant predictor of vertical jump performance, further demonstrating deteriorated muscle quality at old age (sarcosthenia).
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Affiliation(s)
- José R Alvero-Cruz
- Facultad de Medicina, Instituto de Investigación Biomédica de Málaga, Universidad de Málaga, Málaga, Spain
| | - Mieszko Brikis
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
| | - Phil Chilibeck
- College of Kinesiology, University of Saskatchewan, Saskatoon, SK, Canada
| | - Petra Frings-Meuthen
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
| | - Jose F Vico Guzmán
- Facultad de Medicina, Instituto de Investigación Biomédica de Málaga, Universidad de Málaga, Málaga, Spain
| | - Uwe Mittag
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
| | - Sarah Michely
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
| | - Edwin Mulder
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
| | - Hirofumi Tanaka
- Department of Kinesiology and Health Education, The University of Texas at Austin, Austin, TX, United States
| | - Jens Tank
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
| | - Jörn Rittweger
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany.,Department of Pediatrics and Adolescent Medicine, University of Cologne, Cologne, Germany
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11
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Frings-Meuthen P, Henkel S, Boschmann M, Chilibeck PD, Alvero Cruz JR, Hoffmann F, Möstl S, Mittag U, Mulder E, Rittweger N, Sies W, Tanaka H, Rittweger J. Resting Energy Expenditure of Master Athletes: Accuracy of Predictive Equations and Primary Determinants. Front Physiol 2021; 12:641455. [PMID: 33828487 PMCID: PMC8020034 DOI: 10.3389/fphys.2021.641455] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Accepted: 02/17/2021] [Indexed: 01/26/2023] Open
Abstract
Resting energy expenditure (REE) is determined mainly by fat-free mass (FFM). FFM depends also on daily physical activity. REE normally decreases with increased age due to decreases in FFM and physical activity. Measuring REE is essential for estimating total energy expenditure. As such, there are a number of different equations in use to predict REE. In recent years, an increasing number of older adults continue to participate in competitive sports creating the surge of master athletes. It is currently unclear if these equations developed primarily for the general population are also valid for highly active, older master athletes. Therefore, we tested the validity of six commonly-used equations for predicting REE in master athletes. In conjunction with the World Masters Athletic Championship in Malaga, Spain, we measured REE in 113 master athletes by indirect calorimetry. The most commonly used equations to predict REE [Harris & Benedict (H&B), World Health Organization (WHO), Müller (MÜL), Müller-FFM (MÜL-FFM), Cunningham (CUN), and De Lorenzo (LOR)] were tested for their accuracies. The influences of age, sex, height, body weight, FFM, training hours per week, phase angle, ambient temperature, and athletic specialization on REE were determined. All estimated REEs for the general population differed significantly from the measured ones (H&B, WHO, MÜL, MÜL-FFM, CUN, all p < 0.005). The equation put forward by De Lorenzo provided the most accurate prediction of REE for master athletes, closely followed by FFM-based Cunningham’s equation. The accuracy of the remaining commonly-used prediction equations to estimate REE in master athletes are less accurate. Body weight (p < 0.001), FFM (p < 0.001), FM (p = 0.007), sex (p = 0.045) and interestingly temperature (p = 0.004) are the significant predictors of REE. We conclude that REE in master athletes is primarily determined by body composition and ambient temperature. Our study provides a first estimate of energy requirements for master athletes in order to cover adequately athletes’ energy and nutrient requirements to maintain their health status and physical performance.
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Affiliation(s)
- Petra Frings-Meuthen
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
| | - Sara Henkel
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
| | - Michael Boschmann
- Experimental and Clinical Research Center - a joint co-operation between Charité Universitätsmedizin Berlin and Max Delbrück Center for Molecular Medicine, Berlin, Germany
| | - Philip D Chilibeck
- College of Kinesiology, University of Saskatchewan, Saskatoon, SK, Canada
| | - José Ramón Alvero Cruz
- Facultad de Medicina, Instituto de Investigación Biomédica de Málaga, Universidad de Málaga, Málaga, Spain
| | - Fabian Hoffmann
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany.,Department of Internal Medicine III, University Hospital Cologne, Cologne, Germany
| | - Stefan Möstl
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
| | - Uwe Mittag
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
| | - Edwin Mulder
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
| | - Natia Rittweger
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
| | - Wolfram Sies
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
| | - Hirofumi Tanaka
- Department of Kinesiology and Health Education, The University of Texas at Austin, Austin, TX, United States
| | - Jörn Rittweger
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany.,Department of Pediatrics and Adolsecent Medicine, Hospital Cologne, Cologne, Germany
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12
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Wooten SV, Mittag U, Alvero Cruz JR, Stray-Gundersen S, Hoffmann F, Michély S, Möstl S, Sies W, Mulder E, Rauschendorfer P, Chilibeck PD, Rittweger J, Tanaka H. Life Satisfaction, Positive Affect, and Sleep Impairment in Masters Athletes: Modulation by Age, Sex, and Exercise Type. Front Physiol 2021; 12:634433. [PMID: 33746775 PMCID: PMC7970109 DOI: 10.3389/fphys.2021.634433] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 01/22/2021] [Indexed: 11/13/2022] Open
Abstract
Introduction The masters athlete has been proposed as a model of successful aging. Research studies investigating psychological outlook in older athletes have primarily addressed negative affects including depression, anxiety, and stress. The impact of lifelong exercise on positive affect and life satisfaction as well as sleep impairment that could impact on these psychological states is largely unknown. Methods A series of questionnaires (general life satisfaction, positive affect, and sleep-related impairment) were administered to 240 masters athletes participating in the World Masters Athletics Championships. Total raw scores were converted into T scores for comparison with the general population. Meaningful difference was defined by the PROMIS® as one-half standard deviation from the centering sample. Results Meaningful differences were observed for improved general life satisfaction and reduced sleep impairment for all masters athletes. Positive affect did not reach the meaningful difference threshold. No significant sex differences were found for any of the questionnaires (all p > 0.05). Similarly, no significant differences were found between endurance, sprint, and strength/power sports for general life satisfaction (p = 0.18), positive affect (p = 0.46), and sleep impairment (p = 0.77). In general, life satisfaction increased with age (r = 0.15, p = 0.02), and sleep impairment trended towards reduction with age (r = −0.13, p = 0.05). Positive affect demonstrated no correlation with age (r = 0.09, p = 0.18). Conclusion This study demonstrates that the lifestyles of masters athletes contribute to improved general life satisfaction and reduced sleep impairment but not improved positive affect. The beneficial effects were observed irrespective of age, gender, and sporting types.
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Affiliation(s)
- Savannah V Wooten
- Department of Kinesiology and Health Education, The University of Texas at Austin, Austin, TX, United States
| | - Uwe Mittag
- German Aerospace Center, Institute of Aerospace Medicine, Cologne, Germany
| | - José Ramón Alvero Cruz
- Department of Human Physiology and Sports Physical Education, University of Málaga, Málaga, Spain
| | - Sten Stray-Gundersen
- Department of Kinesiology and Health Education, The University of Texas at Austin, Austin, TX, United States
| | - Fabian Hoffmann
- German Aerospace Center, Institute of Aerospace Medicine, Cologne, Germany.,Department of Cardiology, University Hospital Cologne, Cologne, Germany
| | - Sarah Michély
- German Aerospace Center, Institute of Aerospace Medicine, Cologne, Germany
| | - Stefan Möstl
- German Aerospace Center, Institute of Aerospace Medicine, Cologne, Germany
| | - Wolfram Sies
- German Aerospace Center, Institute of Aerospace Medicine, Cologne, Germany
| | - Edwin Mulder
- German Aerospace Center, Institute of Aerospace Medicine, Cologne, Germany
| | | | - Philip D Chilibeck
- College of Kinesiology, University of Saskatchewan, Saskatoon, SK, Canada
| | - Jörn Rittweger
- German Aerospace Center, Institute of Aerospace Medicine, Cologne, Germany.,Department of Pediatrics and Adolescent Medicine, University of Cologne, Cologne, Germany
| | - Hirofumi Tanaka
- Department of Kinesiology and Health Education, The University of Texas at Austin, Austin, TX, United States
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13
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Wooten SV, Moestl S, Chilibeck P, Alvero Cruz JR, Mittag U, Tank J, Tanaka H, Rittweger J, Hoffmann F. Age- and Sex-Differences in Cardiac Characteristics Determined by Echocardiography in Masters Athletes. Front Physiol 2021; 11:630148. [PMID: 33536945 PMCID: PMC7848176 DOI: 10.3389/fphys.2020.630148] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 12/29/2020] [Indexed: 01/20/2023] Open
Abstract
Background Cardiac function and morphology are known to differ between men and women. Sex differences seen with echocardiography have not been studied systematically in masters athletes. Purpose To evaluate sex differences in cardiac structure, function and left ventricular (LV) systolic global longitudinal strain among masters athletes. Methods This cross-sectional study comprises of 163 masters athletes (M = 109, 60 ± 12 years; F = 55, 57 ± 12 years, range 36–91 years) who participated at the 23rd World Masters Athletics Championship held in Málaga, Spain. All athletes underwent state-of-the-art echocardiography including cardiac function, morphology, strain and hemodynamic assessment. Results Left ventricular mass was higher in male than in female athletes (174 ± 44 vs. 141 ± 36 g, p < 0.01) due to greater end-diastolic intraventricular septal, LV posterior wall and LV basal diameter. However, LV mass index did not differ between the groups. End-diastolic LV volume and right ventricular area, both indexed to body-surface-area, were greater in men than in women (52.8 ± 11.0 vs. 46.1 ± 8.5 ml/m2, p < 0.01, 9.5 ± 2.4 vs. 8.1 ± 1.7 cm2/m2, p < 0.01). In contrast, women had higher LV systolic global longitudinal strain (-20.2 ± 2.6 vs. -18.8 ± 2.6%, p < 0.01) and LV outflow tract flow velocity (75.1 ± 11.1 vs. 71.2 ± 11.1 cm/s, p = 0.04). Systolic and diastolic blood pressure, LV ejection fraction, and stroke volume index were not different between sexes. Conclusion Cardiac sex differences are present even among masters athletes. Lifelong exercise training does not appear to exasperate morphological difference to a point of cardiac risk or dysfunction in both male and female athletes.
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Affiliation(s)
- Savannah V Wooten
- Department of Kinesiology and Health Education, The University of Texas at Austin, Austin, TX, United States
| | - Stefan Moestl
- Institute of Aerospace Medicine, German Aerospace Center, University of Cologne, Cologne, Germany
| | - Phil Chilibeck
- Physical Activity Complex, University of Saskatchewan College of Kinesiology, Saskatoon, SK, Canada
| | | | - Uwe Mittag
- Institute of Aerospace Medicine, German Aerospace Center, University of Cologne, Cologne, Germany
| | - Jens Tank
- Institute of Aerospace Medicine, German Aerospace Center, University of Cologne, Cologne, Germany
| | - Hirofumi Tanaka
- Department of Kinesiology and Health Education, The University of Texas at Austin, Austin, TX, United States
| | - Jörn Rittweger
- Institute of Aerospace Medicine, German Aerospace Center, University of Cologne, Cologne, Germany
| | - Fabian Hoffmann
- Institute of Aerospace Medicine, German Aerospace Center, University of Cologne, Cologne, Germany.,Department of Cardiology, University Hospital Cologne, Cologne, Germany
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14
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Ireland A, Mittag U, Degens H, Felsenberg D, Ferretti JL, Heinonen A, Koltai E, Korhonen MT, McPhee JS, Mekjavic I, Piasecki J, Pisot R, Radak Z, Simunic B, Suominen H, Wilks DC, Winwood K, Rittweger J. Greater maintenance of bone mineral content in male than female athletes and in sprinting and jumping than endurance athletes: a longitudinal study of bone strength in elite masters athletes. Arch Osteoporos 2020; 15:87. [PMID: 32524289 PMCID: PMC7286845 DOI: 10.1007/s11657-020-00757-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Accepted: 05/11/2020] [Indexed: 02/03/2023]
Abstract
UNLABELLED We investigated longitudinal changes in tibia bone strength in master power (jumping and sprinting) and endurance (distance) athletes of both sexes. Bone mass but not cross-sectional moment of inertia was better maintained in power than endurance athletes over time, particularly in men and independent of changes in performance. OBJECTIVE Assessment of effects of sex and athletic discipline (lower limb power events, e.g. sprint running and jumping versus endurance running events) on longitudinal changes in bone strength in masters athletes. METHODS We examined tibia and fibula bone properties at distal (4% distal-proximal tibia length) and proximal (66% length) sites using peripheral quantitative computed tomography (pQCT) in seventy-one track and field masters athletes (30 male, 41 female, age at baseline 57.0 ± 12.2 years) in a longitudinal cohort study that included at least two testing sessions over a mean period of 4.2 ± 3.1 years. Effects of time, as well as time × sex and time × discipline interactions on bone parameters and calf muscle cross-sectional area (CSA), were examined. RESULTS Effects of time were sex and discipline-dependent, even following adjustment for enrolment age, sex and changes in muscle CSA and athletic performance. Male sex and participation in power events was associated with better maintenance of tibia bone mineral content (BMC, an indicator of bone compressive strength) at 4% and 66% sites. In contrast, there was no strong evidence of sex or discipline effects on cross-sectional moment of inertia (CSMI, an indicator of bone bending and torsional strength-P > 0.3 for interactions). Similar sex and discipline-specific changes were also observed in the fibula. CONCLUSIONS Results suggest that male athletes and those participating in lower limb power-based rather than endurance-based disciplines have better maintenance of bone compressive but not bending and torsional strength.
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Affiliation(s)
- Alex Ireland
- grid.25627.340000 0001 0790 5329Department of Life Sciences, Musculoskeletal Science and Sports Medicine Research Centre, Manchester Metropolitan University, John Dalton Building, Chester Street, Manchester, M1 5GD UK
| | - Uwe Mittag
- grid.7551.60000 0000 8983 7915Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany
| | - Hans Degens
- grid.25627.340000 0001 0790 5329Department of Life Sciences, Musculoskeletal Science and Sports Medicine Research Centre, Manchester Metropolitan University, John Dalton Building, Chester Street, Manchester, M1 5GD UK ,grid.419313.d0000 0000 9487 602XLithuanian Sports University, Kaunas, Lithuania ,grid.10414.300000 0001 0738 9977University of Medicine and Pharmacy of Targu Mures, Targu Mures, Romania
| | - Dieter Felsenberg
- grid.7468.d0000 0001 2248 7639Osteology and Orphane Bone Diseases and Charité – Campus Benjamin Franklin, Centre of Muscle and Bone Research, Humboldt-University Berlin and Free University, Berlin, Germany
| | - José L. Ferretti
- grid.10814.3c0000 0001 2097 3211Center for P-Ca Metabolism Studies (CEMFoC), National University of Rosario, Rosario, Argentina
| | - Ari Heinonen
- grid.9681.60000 0001 1013 7965Faculty of Sport and Health Sciences, University of Jyväskylä, Jyvaskyla, Finland
| | - Erika Koltai
- grid.472475.70000 0000 9243 1481Research Institute of Sport Science, University of Physical Education, Budapest, Hungary
| | - Marko T. Korhonen
- grid.9681.60000 0001 1013 7965Gerontology Research Center, Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
| | - Jamie S. McPhee
- grid.25627.340000 0001 0790 5329Department of Sport and Exercise Sciences, Musculoskeletal Science and Sports Medicine Research Centre, Manchester Metropolitan University, Manchester, UK
| | - Igor Mekjavic
- grid.11375.310000 0001 0706 0012Department of Automation, Biocybernetics and Robotics, Jozef Stefan Institute, Ljubljana, Slovenia ,grid.61971.380000 0004 1936 7494Department of Biomedical Physiology and Kinesiology, Simon Fraser University, Burnaby, BC Canada
| | - Jessica Piasecki
- grid.25627.340000 0001 0790 5329Department of Life Sciences, Musculoskeletal Science and Sports Medicine Research Centre, Manchester Metropolitan University, John Dalton Building, Chester Street, Manchester, M1 5GD UK ,grid.12361.370000 0001 0727 0669Sport Health and Performance Enhancement Centre, Nottingham Trent University, Nottingham, UK
| | - Rado Pisot
- Science and Research Centre Koper, Institute for Kinesiology Research, Koper, Slovenia
| | - Zsolt Radak
- grid.472475.70000 0000 9243 1481Research Institute of Sport Science, University of Physical Education, Budapest, Hungary
| | - Bostjan Simunic
- Science and Research Centre Koper, Institute for Kinesiology Research, Koper, Slovenia
| | - Harri Suominen
- grid.9681.60000 0001 1013 7965Faculty of Sport and Health Sciences, University of Jyväskylä, Jyvaskyla, Finland
| | - Désirée C. Wilks
- grid.25627.340000 0001 0790 5329Department of Life Sciences, Musculoskeletal Science and Sports Medicine Research Centre, Manchester Metropolitan University, John Dalton Building, Chester Street, Manchester, M1 5GD UK
| | - Keith Winwood
- grid.25627.340000 0001 0790 5329Department of Life Sciences, Musculoskeletal Science and Sports Medicine Research Centre, Manchester Metropolitan University, John Dalton Building, Chester Street, Manchester, M1 5GD UK
| | - Jörn Rittweger
- grid.7551.60000 0000 8983 7915Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany ,grid.6190.e0000 0000 8580 3777Department of Pediatrics and Adolescent Medicine, University of Cologne, Cologne, Germany
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15
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Mittag U, Kriechbaumer A, Rittweger J. Torsion - an underestimated form shaping entity in bone adaptation? J Musculoskelet Neuronal Interact 2018; 18:407-418. [PMID: 30511945 PMCID: PMC6313035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVES There is ample agreement that the specific shape of a bone is related to the loads it has to carry. It is also believed that bones mechano-adapt in order to 'find' this shape. The open question is which signals constitute the determinants of this adapation. Recent in vivo experiments show that torsion is a significant load component in human tibia, and a computational study of the mechanostat has indicated that torsion could play a role in the shaping of tubular long bones. METHODS An earlier computational approach is further progressed to systematically study the relative importance of axial compression, lateral bending and axial torsion. RESULTS Results demonstrate that shape-driving potential towards tubular shapes is greatest for torsion, followed by bending and least for axial compression. Multiple linear regression analysis confirmed the dominant role of torsion, in particular for the 2nd moment of intertia. The obtained results were largely unaffected by starting conditions, e.g. either from a grid or through reshaping under disuse. CONCLUSIONS Strong support has been found for the hypothesis torsion could be more important than suggested in previous studies as a component of the mechanical environment of bones. This will apply to the shafts of long bones, and also to the femoral neck.
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Affiliation(s)
- Uwe Mittag
- German Aerospace Center, Institute for Aerospace Medicine, Germany,Corresponding author: Uwe Mittag, German Aerospace Center, Institute for Aerospace Medicine, Linder Höhe, 51147 Köln, Germany E-mail:
| | | | - Jörn Rittweger
- German Aerospace Center, Institute for Aerospace Medicine, Germany,Department of Pediatrics and Adolescent Medicine, University of Cologne, Cologne, Germany
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16
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Debevec T, Ganse B, Mittag U, Eiken O, Mekjavic IB, Rittweger J. Hypoxia Aggravates Inactivity-Related Muscle Wasting. Front Physiol 2018; 9:494. [PMID: 29867545 PMCID: PMC5962751 DOI: 10.3389/fphys.2018.00494] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Accepted: 04/18/2018] [Indexed: 11/13/2022] Open
Abstract
Poor musculoskeletal state is commonly observed in numerous clinical populations such as chronic obstructive pulmonary disease (COPD) and heart failure patients. It, however, remains unresolved whether systemic hypoxemia, typically associated with such clinical conditions, directly contributes to muscle deterioration. We aimed to experimentally elucidate the effects of systemic environmental hypoxia upon inactivity-related muscle wasting. For this purpose, fourteen healthy, male participants underwent three 21-day long interventions in a randomized, cross-over designed manner: (i) bed rest in normoxia (NBR; PiO2 = 133.1 ± 0.3 mmHg), (ii) bed rest in normobaric hypoxia (HBR; PiO2 = 90.0 ± 0.4 mmHg) and ambulatory confinement in normobaric hypoxia (HAmb; PiO2 = 90.0 ± 0.4 mmHg). Peripheral quantitative computed tomography and vastus lateralis muscle biopsies were performed before and after the interventions to obtain thigh and calf muscle cross-sectional areas and muscle fiber phenotype changes, respectively. A significant reduction of thigh muscle size following NBR (-6.9%, SE 0.8%; P < 0.001) was further aggravated following HBR (-9.7%, SE 1.2%; P = 0.027). Bed rest-induced muscle wasting in the calf was, by contrast, not exacerbated by hypoxic conditions (P = 0.47). Reductions in both thigh (-2.7%, SE 1.1%, P = 0.017) and calf (-3.3%, SE 0.7%, P < 0.001) muscle size were noted following HAmb. A significant and comparable increase in type 2× fiber percentage of the vastus lateralis muscle was noted following both bed rest interventions (NBR = +3.1%, SE 2.6%, HBR = +3.9%, SE 2.7%, P < 0.05). Collectively, these data indicate that hypoxia can exacerbate inactivity-related muscle wasting in healthy active participants and moreover suggest that the combination of both, hypoxemia and lack of activity, as seen in COPD patients, might be particularly harmful for muscle tissue.
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Affiliation(s)
- Tadej Debevec
- Faculty of Sport, University of Ljubljana, Ljubljana, Slovenia.,Department of Automation, Biocybernetics and Robotics, Jožef Stefan Institute, Ljubljana, Slovenia
| | - Bergita Ganse
- Department of Orthopaedic Trauma, RWTH Aachen University Hospital, Aachen, Germany.,Institute of Aerospace Medicine, German Aerospace Center, Cologne, Germany
| | - Uwe Mittag
- Institute of Aerospace Medicine, German Aerospace Center, Cologne, Germany
| | - Ola Eiken
- Department of Environmental Physiology, Swedish Aerospace Physiology Centre, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Igor B Mekjavic
- Department of Automation, Biocybernetics and Robotics, Jožef Stefan Institute, Ljubljana, Slovenia.,Department of Biomedical Physiology and Kinesiology, Simon Fraser University, Burnaby, BC, Canada
| | - Jörn Rittweger
- Institute of Aerospace Medicine, German Aerospace Center, Cologne, Germany.,Department of Pediatrics and Adolescent Medicine, University of Cologne, Cologne, Germany
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Mittag U, Kriechbaumer A, Rittweger J. A novel interpolation approach for the generation of 3D-geometric digital bone models from image stacks. J Musculoskelet Neuronal Interact 2017; 17:86-96. [PMID: 28574415 PMCID: PMC5492323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Accepted: 02/27/2017] [Indexed: 11/09/2022]
Abstract
The authors propose a new 3D interpolation algorithm for the generation of digital geometric 3D-models of bones from existing image stacks obtained by peripheral Quantitative Computed Tomography (pQCT) or Magnetic Resonance Imaging (MRI). The technique is based on the interpolation of radial gray value profiles of the pQCT cross sections. The method has been validated by using an ex-vivo human tibia and by comparing interpolated pQCT images with images from scans taken at the same position. A diversity index of ⟨0.4 (1 meaning maximal diversity) even for the structurally complex region of the epiphysis, along with the good agreement of mineral-density-weighted cross-sectional moment of inertia (CSMI), demonstrate the high quality of our interpolation approach. Thus the authors demonstrate that this interpolation scheme can substantially improve the generation of 3D models from sparse scan sets, not only with respect to the outer shape but also with respect to the internal gray-value derived material property distribution.
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Affiliation(s)
- U. Mittag
- German Aerospace Center, Institute for Aerospace Medicine, Linder Höhe, 51147 Cologne, Germany
| | - A. Kriechbaumer
- German Aerospace Center, Space Administration, Königswinterer Str. 522-524, 53227 Bonn, Germany
| | - J. Rittweger
- German Aerospace Center, Institute for Aerospace Medicine, Linder Höhe, 51147 Cologne, Germany
- Department of Pediatrics and Adolescent Medicine, University of Cologne, Kerpener Str. 62, 50937 Cologne, Germany
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Rittweger J, Debevec T, Frings-Meuthen P, Lau P, Mittag U, Ganse B, Ferstl PG, Simpson EJ, Macdonald IA, Eiken O, Mekjavic IB. On the combined effects of normobaric hypoxia and bed rest upon bone and mineral metabolism: Results from the PlanHab study. Bone 2016; 91:130-8. [PMID: 27443510 DOI: 10.1016/j.bone.2016.07.013] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 06/29/2016] [Accepted: 07/17/2016] [Indexed: 01/10/2023]
Abstract
Bone losses are common as a consequence of unloading and also in patients with chronic obstructive pulmonary disease (COPD). Although hypoxia has been implicated as an important factor to drive bone loss, its interaction with unloading remains unresolved. The objective therefore was to assess whether human bone loss caused by unloading could be aggravated by chronic hypoxia. In a cross-over designed study, 14 healthy young men underwent 21-day interventions of bed rest in normoxia (NBR), bed rest in hypoxia (HBR), and hypoxic ambulatory confinement (HAmb). Hypoxic conditions were equivalent to 4000m altitude. Bone metabolism (NTX, P1NP, sclerostin, DKK1) and phospho-calcic homeostasis (calcium and phosphate serum levels and urinary excretion, PTH) were assessed from regular blood samples and 24-hour urine collections, and tibia and femur bone mineral content was assessed by peripheral quantitative computed tomography (pQCT). Urinary NTX excretion increased (P<0.001) to a similar extent in NBR and HBR (P=0.69) and P1NP serum levels decreased (P=0.0035) with likewise no difference between NBR and HBR (P=0.88). Serum total calcium was increased during bed rest by 0.059 (day D05, SE 0.05mM) to 0.091mM (day D21, P<0.001), with no additional effect by hypoxia during bed rest (P=0.199). HAmb led, at least temporally, to increased total serum calcium, to reduced serum phosphate, and to reduced phosphate and calcium excretion. In conclusion, hypoxia did not aggravate bed rest-induced bone resorption, but led to changes in phospho-calcic homeostasis likely caused by hyperventilation. Whether hyperventilation could have mitigated the effects of hypoxia in this study remains to be established.
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Affiliation(s)
- Jörn Rittweger
- Institute of Aerospace Medicine, German Aerospace Center (DLR), 51147 Cologne, Germany; Department of Pediatrics and Adolescent Medicine, University of Cologne, Cologne, Germany.
| | - Tadej Debevec
- Department of Automation, Biocybernetics and Robotics, Jozef Stefan Institute, Ljubljana, Slovenia
| | - Petra Frings-Meuthen
- Institute of Aerospace Medicine, German Aerospace Center (DLR), 51147 Cologne, Germany
| | - Patrick Lau
- Institute of Aerospace Medicine, German Aerospace Center (DLR), 51147 Cologne, Germany
| | - Uwe Mittag
- Institute of Aerospace Medicine, German Aerospace Center (DLR), 51147 Cologne, Germany
| | - Bergita Ganse
- Institute of Aerospace Medicine, German Aerospace Center (DLR), 51147 Cologne, Germany
| | - Philip G Ferstl
- Medizinische Klinik I, University of Frankfurt, Frankfurt, Germany
| | - Elizabeth J Simpson
- MRC/Arthritis UK Centre for Musculoskeletal Aging Research, University of Nottingham Medical School, School of Life Sciences, Queen's Medical Centre, Nottingham, United Kingdom
| | - Ian A Macdonald
- MRC/Arthritis UK Centre for Musculoskeletal Aging Research, University of Nottingham Medical School, School of Life Sciences, Queen's Medical Centre, Nottingham, United Kingdom
| | - Ola Eiken
- Department of Environmental Physiology, Swedish Aerospace Physiology Centre, Royal Institute of Technology, Stockholm, Sweden
| | - Igor B Mekjavic
- Department of Automation, Biocybernetics and Robotics, Jozef Stefan Institute, Ljubljana, Slovenia; Department of Biomedical Physiology and Kinesiology, Simon Fraser University, Burnaby, British Columbia, Canada
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Mittag U, Kriechbaumer A, Bartsch M, Rittweger J. Form follows function: a computational simulation exercise on bone shape forming and conservation. J Musculoskelet Neuronal Interact 2015; 15:215-26. [PMID: 26032215 PMCID: PMC5133726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The present paper explores whether the shape of long bone shafts can be explained as a mere result of mechano-adapation. A computer simulation study was conducted in order to investigate adaptation processes of bone-like structures under load patterns comparable to those acting on the diaphysis of long bones. The aim of the study was to have a deeper look into the relationship between typical loading patterns and resulting bone shape and structure. The simulations are based on a mechanistic model approach for mechano-transduction and bone transformation. Results of the simulations are that axial torsion around the long axis is important for the evolvement and maintenance of tube-like structures. Of note such structures can form from a variety of starting geometries, provided that axial torsion is present. The selection of the set-point parameter for the regulation of load adapted bone transformation has an impact on the final structure as well. In conclusion, the present study confirms the mechanical environment's potential to generate shaft-like structures and demonstrates the respective boundary conditions.
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Affiliation(s)
- U. Mittag
- German Aerospace Center, Institute for Aerospace Medicine, Linder Höhe, 51147 Köln, Germany,Corresponding author: Dr. Uwe Mittag, German Aerospace Center, Institute for Aerospace Medicine, Linder Höhe, 51147 Köln, Germany E-mail:
| | - A. Kriechbaumer
- German Aerospace Center, Institute for Aerospace Medicine, Linder Höhe, 51147 Köln, Germany
| | - M. Bartsch
- German Aerospace Center, Institute of Materials Research, Linder Höhe, 51147 Köln, Germany
| | - J. Rittweger
- German Aerospace Center, Institute of Materials Research, Linder Höhe, 51147 Köln, Germany,Institute for Biomedical Research into Human Movement and Health, Manchester Metropolitan University, Manchester, United Kingdom
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Samios J, Mittag U. Estimation of the Cancellation Effects in Interaction Induced Far-IR Spectra of Liquid Mixtures via MD Simulation. Application to the CCl4/CS2 Mixture at Different Mole Fractions. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100059a009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Mittag U, Samios J, Dorfmueller T, Guenster S, Zeidler M, Chieux P. A comparative molecular dynamics and neutron scattering study of the liquid mixture carbon tetrachloride/carbon disulphide. Mol Phys 1989. [DOI: 10.1080/00268978900101691] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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