The DOI matches its Crossref record; 7 of the 7 references it cites were found in a registry or an index.
Time course of muscular, neural and tendinous adaptations to 23 day unilateral lower‐limb suspension in young men
Open accessAbstract
Muscles and tendons are highly adaptive to changes in chronic loading, though little is known about the adaptative time course. We tested the hypothesis that, in response to unilateral lower limb suspension (ULLS), the magnitude of tendon mechanical adaptations would match or exceed those of skeletal muscle. Seventeen men (1.79 ± 0.05 m, 76.6 ± 10.3 kg, 22.3 ± 3.8 years) underwent ULLS for 23 days (n= 9) or acted as controls (n= 8). Knee extensor (KE) torque, voluntary activation (VA), cross‐sectional area (CSA) (by magnetic resonance imaging), vastus lateralis fascicle length (Lf) and pennation angle (θ), patellar tendon stiffness and Young's modulus (by ultrasonography) were measured before, during and at the end of ULLS. After 14 and 23 days (i) KE torque decreased by 14.8 ± 5.5% (P < 0.001) and 21.0 ± 7.1% (P < 0.001), respectively; (ii) VA did not change; (iii) KE CSA decreased by 5.2 ± 0.7% (P < 0.001) and 10.0 ± 2.0% (P < 0.001), respectively; Lf decreased by 5.9% (n.s.) and 7.7% (P < 0.05), respectively, and θ by 3.2% (P < 0.05) and 7.6% (P < 0.01); (iv) tendon stiffness decreased by 9.8 ± 8.2% (P < 0.05) and 29.3 ± 11.5% (P < 0.005), respectively, and Young's modulus by 9.2 ± 8.2% (P < 0.05) and 30.1 ± 11.9% (P < 0.01), respectively, with no changes in the controls. Hence, ULLS induces rapid losses of KE muscle size, architecture and function, but not in neural drive. Significant deterioration in tendon mechanical properties also occurs within 2 weeks, exacerbating in the third week of ULLS. Rehabilitation to limit muscle and tendon deterioration should probably start within 2 weeks of unloading.
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Cites
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Muscle volume, MRI relaxation times (T2), and body composition after spaceflight
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Regional changes in muscle mass following 17 weeks of bed rest
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“However, the losses of contractile strength and power with unloading seem to be consistently greater than the decreases in muscle size and volume (Berg et al. 1991; LeBlanc et al. 1992; Antonutto et al. 1999; Alkner & Tesch, 2004).”
Alkner, B. A., & Tesch, P. A. (2004) · European Journal of Applied Physiology · doi:10.1007/s00421-004-1172-8 · Cited by 306
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Sarcopenia: characteristics, mechanisms and functional significance
Narici, M. V., & Maffulli, N. (2010) · British Medical Bulletin · doi:10.1093/bmb/ldq008 · Cited by 827
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Self-citationEffects of aging on human skeletal muscle after immobilization and retraining
Suetta, C., Hvid, L. G., Justesen, L., Christensen, U., Neergaard, K., Simonsen, L., Ortenblad, N., Magnusson, S. P., Kjaer, M., & Aagaard, P. (2009) · Journal of Applied Physiology · doi:10.1152/japplphysiol.00290.2009 · Cited by 400
Skeletal muscle atrophy during short-term disuse: Implications for age-related sarcopenia
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Metadata
- Authors
- De Boer, M. D., Maganaris, C. N., Seynnes, O. R., Rennie, M. J., & Narici, M. V.
- Venue
- The Journal of Physiology
- Publisher
- Wiley
- Published
- 2007-09
- Volume
- 583
- Issue
- 3
- Pages
- 1079-1091
- ISSN
- 0022-3751 (ISSN-L)
- 1469-7793
- OpenAlex
- W2156010205
- Cited by
- 283
- References
- 7
- FWCI
- 8.11
- Type
- journal article
- Language
- en
- Open access
- green
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- De Boer, M. D., Maganaris, C. N., Seynnes, O. R., Rennie, M. J., & Narici, M. V. (2007). Time course of muscular, neural and tendinous adaptations to 23 day unilateral lower‐limb suspension in young men. The Journal of Physiology. https://doi.org/10.1113/jphysiol.2007.135392
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