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Stretch-shortening cycle exercises: an effective training paradigm to enhance power output of human single muscle fibers.
J Appl Physiol (1985). 2006 Mar; 100(3):771-9.JA

Abstract

Functional performance of lower limb muscles and contractile properties of chemically skinned single muscle fibers were evaluated before and after 8 wk of maximal effort stretch-shortening cycle (SSC) exercise training. Muscle biopsies were obtained from the vastus lateralis of eight men before and after the training period. Fibers were evaluated regarding their mechanical properties and subsequently classified according to their myosin heavy chain content (SDS-PAGE). After training, maximal leg extensor muscle force and vertical jump performance were improved 12% (P<0.01) and 13% (P<0.001), respectively. Single-fiber cross-sectional area increased 23% in type I (P<0.01), 22% in type IIa (P<0.001), and 30% in type IIa/IIx fibers (P<0.001). Peak force increased 19% in type I (P<0.01), 15% in type IIa (P<0.001), and 16% in type IIa/IIx fibers (P<0.001). When peak force was normalized with cross-sectional area, no changes were found for any fiber type. Maximal shortening velocity was increased 18, 29, and 22% in type I, IIa, and hybrid IIa/IIx fibers, respectively (P<0.001). Peak power was enhanced in all fiber types, and normalized peak power improved 9% in type IIa fibers (P<0.05). Fiber tension on passive stretch increased in IIa/IIx fibers only (P<0.05). In conclusion, short-term SSC exercise training enhanced single-fiber contraction performance via force and contraction velocity in type I, IIa, and IIa/IIx fibers. These results suggest that SSC exercises are an effective training approach to improve fiber force, contraction velocity, and therefore power.

Authors+Show Affiliations

Département d'Education Physique et de Réadaptation, Faculté de Médecine, Université Catholique de Louvain, Louvain-La-Neuve, Belgium.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Clinical Trial
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

16322375

Citation

Malisoux, Laurent, et al. "Stretch-shortening Cycle Exercises: an Effective Training Paradigm to Enhance Power Output of Human Single Muscle Fibers." Journal of Applied Physiology (Bethesda, Md. : 1985), vol. 100, no. 3, 2006, pp. 771-9.
Malisoux L, Francaux M, Nielens H, et al. Stretch-shortening cycle exercises: an effective training paradigm to enhance power output of human single muscle fibers. J Appl Physiol (1985). 2006;100(3):771-9.
Malisoux, L., Francaux, M., Nielens, H., & Theisen, D. (2006). Stretch-shortening cycle exercises: an effective training paradigm to enhance power output of human single muscle fibers. Journal of Applied Physiology (Bethesda, Md. : 1985), 100(3), 771-9.
Malisoux L, et al. Stretch-shortening Cycle Exercises: an Effective Training Paradigm to Enhance Power Output of Human Single Muscle Fibers. J Appl Physiol (1985). 2006;100(3):771-9. PubMed PMID: 16322375.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Stretch-shortening cycle exercises: an effective training paradigm to enhance power output of human single muscle fibers. AU - Malisoux,Laurent, AU - Francaux,Marc, AU - Nielens,Henri, AU - Theisen,Daniel, Y1 - 2005/12/01/ PY - 2005/12/3/pubmed PY - 2006/4/21/medline PY - 2005/12/3/entrez SP - 771 EP - 9 JF - Journal of applied physiology (Bethesda, Md. : 1985) JO - J Appl Physiol (1985) VL - 100 IS - 3 N2 - Functional performance of lower limb muscles and contractile properties of chemically skinned single muscle fibers were evaluated before and after 8 wk of maximal effort stretch-shortening cycle (SSC) exercise training. Muscle biopsies were obtained from the vastus lateralis of eight men before and after the training period. Fibers were evaluated regarding their mechanical properties and subsequently classified according to their myosin heavy chain content (SDS-PAGE). After training, maximal leg extensor muscle force and vertical jump performance were improved 12% (P<0.01) and 13% (P<0.001), respectively. Single-fiber cross-sectional area increased 23% in type I (P<0.01), 22% in type IIa (P<0.001), and 30% in type IIa/IIx fibers (P<0.001). Peak force increased 19% in type I (P<0.01), 15% in type IIa (P<0.001), and 16% in type IIa/IIx fibers (P<0.001). When peak force was normalized with cross-sectional area, no changes were found for any fiber type. Maximal shortening velocity was increased 18, 29, and 22% in type I, IIa, and hybrid IIa/IIx fibers, respectively (P<0.001). Peak power was enhanced in all fiber types, and normalized peak power improved 9% in type IIa fibers (P<0.05). Fiber tension on passive stretch increased in IIa/IIx fibers only (P<0.05). In conclusion, short-term SSC exercise training enhanced single-fiber contraction performance via force and contraction velocity in type I, IIa, and IIa/IIx fibers. These results suggest that SSC exercises are an effective training approach to improve fiber force, contraction velocity, and therefore power. SN - 8750-7587 UR - https://www.unboundmedicine.com/medline/citation/16322375/Stretch_shortening_cycle_exercises:_an_effective_training_paradigm_to_enhance_power_output_of_human_single_muscle_fibers_ L2 - https://journals.physiology.org/doi/10.1152/japplphysiol.01027.2005?url_ver=Z39.88-2003&amp;rfr_id=ori:rid:crossref.org&amp;rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -