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Effects of combined strength and sprint training on regulation of muscle contraction at the whole-muscle and single-fibre levels in elite master sprinters.
Acta Physiol (Oxf). 2008 Jul; 193(3):275-89.AP

Abstract

AIM

This study aims at examining the effects of progressive strength and sprint training on regulation of muscle contraction at the whole-muscle and single-fibre levels in older sprint-trained athletes.

METHODS

Eleven men (52-78 years) were randomized to a training (EX, n = 7) or control (CTRL, n = 4) group. EX participated in a 20-week programme that combined sprint training with heavy and explosive strength exercises, while CTRL maintained their usual run-based training schedules.

RESULTS

EX improved maximal isometric and dynamic leg strength, explosive jump performance and force production in running. Specific tension and maximum shortening velocity of single fibres from the vastus lateralis were not altered in EX or CTRL. Fibre type and myosin heavy chain isoform distributions remained unchanged in the two groups. There was a general increase in fibre areas in EX, but this was significant only in IIa fibres. The 10% increase in squat jump in EX was accompanied by a 9% increase in the integrated EMG (iEMG) of the leg extensors but the 21-40% increases in isometric and dynamic strength were not paralleled by changes in iEMG.

CONCLUSION

Adding strength training stimulus to the training programme improved maximal, explosive and sport-specific force production in elite master sprinters. These improvements were primarily related to hypertrophic muscular adaptations.

Links

Publisher Full Text (DOI)

Authors+Show Affiliations

Cristea A
Department of Clinical Neurophysiology, University of Uppsala, Uppsala, Sweden.
Korhonen MT
No affiliation info available
Häkkinen K
No affiliation info available
Mero A
No affiliation info available
Alén M
No affiliation info available
Sipilä S
No affiliation info available
Viitasalo JT
No affiliation info available
Koljonen MJ
No affiliation info available
Suominen H
No affiliation info available
Larsson L
No affiliation info available

MeSH

Adenosine TriphosphatasesAgedBiopsyElectromyographyExerciseHumansIsometric ContractionLegMaleMiddle AgedMuscle ContractionMuscle Fibers, SkeletalMuscle StrengthMuscle, SkeletalMyofibrilsMyosin Heavy ChainsProtein IsoformsRunning

Pub Type(s)

Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

18284658

Citation

Cristea, A, et al. "Effects of Combined Strength and Sprint Training On Regulation of Muscle Contraction at the Whole-muscle and Single-fibre Levels in Elite Master Sprinters." Acta Physiologica (Oxford, England), vol. 193, no. 3, 2008, pp. 275-89.
Cristea A, Korhonen MT, Häkkinen K, et al. Effects of combined strength and sprint training on regulation of muscle contraction at the whole-muscle and single-fibre levels in elite master sprinters. Acta Physiol (Oxf). 2008;193(3):275-89.
Cristea, A., Korhonen, M. T., Häkkinen, K., Mero, A., Alén, M., Sipilä, S., Viitasalo, J. T., Koljonen, M. J., Suominen, H., & Larsson, L. (2008). Effects of combined strength and sprint training on regulation of muscle contraction at the whole-muscle and single-fibre levels in elite master sprinters. Acta Physiologica (Oxford, England), 193(3), 275-89. https://doi.org/10.1111/j.1748-1716.2008.01843.x
Cristea A, et al. Effects of Combined Strength and Sprint Training On Regulation of Muscle Contraction at the Whole-muscle and Single-fibre Levels in Elite Master Sprinters. Acta Physiol (Oxf). 2008;193(3):275-89. PubMed PMID: 18284658.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of combined strength and sprint training on regulation of muscle contraction at the whole-muscle and single-fibre levels in elite master sprinters. AU - Cristea,A, AU - Korhonen,M T, AU - Häkkinen,K, AU - Mero,A, AU - Alén,M, AU - Sipilä,S, AU - Viitasalo,J T, AU - Koljonen,M J, AU - Suominen,H, AU - Larsson,L, Y1 - 2008/02/12/ PY - 2008/2/21/pubmed PY - 2008/12/17/medline PY - 2008/2/21/entrez SP - 275 EP - 89 JF - Acta physiologica (Oxford, England) JO - Acta Physiol (Oxf) VL - 193 IS - 3 N2 - AIM: This study aims at examining the effects of progressive strength and sprint training on regulation of muscle contraction at the whole-muscle and single-fibre levels in older sprint-trained athletes. METHODS: Eleven men (52-78 years) were randomized to a training (EX, n = 7) or control (CTRL, n = 4) group. EX participated in a 20-week programme that combined sprint training with heavy and explosive strength exercises, while CTRL maintained their usual run-based training schedules. RESULTS: EX improved maximal isometric and dynamic leg strength, explosive jump performance and force production in running. Specific tension and maximum shortening velocity of single fibres from the vastus lateralis were not altered in EX or CTRL. Fibre type and myosin heavy chain isoform distributions remained unchanged in the two groups. There was a general increase in fibre areas in EX, but this was significant only in IIa fibres. The 10% increase in squat jump in EX was accompanied by a 9% increase in the integrated EMG (iEMG) of the leg extensors but the 21-40% increases in isometric and dynamic strength were not paralleled by changes in iEMG. CONCLUSION: Adding strength training stimulus to the training programme improved maximal, explosive and sport-specific force production in elite master sprinters. These improvements were primarily related to hypertrophic muscular adaptations. SN - 1748-1716 UR - https://www.unboundmedicine.com/medline/citation/18284658/Effects_of_combined_strength_and_sprint_training_on_regulation_of_muscle_contraction_at_the_whole_muscle_and_single_fibre_levels_in_elite_master_sprinters_ DB - PRIME DP - Unbound Medicine ER -