Tags

Type your tag names separated by a space and hit enter

Factors that differentiate acceleration ability in field sport athletes.
J Strength Cond Res. 2011 Oct; 25(10):2704-14.JS

Abstract

Speed and acceleration are essential for field sport athletes. However, the mechanical factors important for field sport acceleration have not been established in the scientific literature. The purpose of this study was to determine the biomechanical and performance factors that differentiate sprint acceleration ability in field sport athletes. Twenty men completed sprint tests for biomechanical analysis and tests of power, strength, and leg stiffness. The sprint intervals analyzed were 0-5, 5-10, and 0-10 m. The subjects were split into a faster and slower group based on 0- to 10-m velocity. A 1-way analysis of variance determined variables that significantly (p ≤ 0.05) distinguished between faster and slower acceleration. All subject data were then pooled for a correlation analysis to determine factors contributing most to acceleration. The results showed that 0- to 5-m (∼16% difference) and 0- to 10-m (∼11% difference) contact times for the faster group were significantly lower. Times to peak vertical and horizontal force during ground contact were lower for the faster group. This was associated with the reduced support times achieved by faster accelerators and their ability to generate force quickly. Ground contact force profiles during initial acceleration are useful discriminators of sprint performance in field sport athletes. For the strength and power measures, the faster group demonstrated a 14% greater countermovement jump and 48% greater reactive strength index. Significant correlations were found between velocity (0-5, 5-10, and 0-10 m) and most strength and power measures. The novel finding of this study is that training programs directed toward improving field sport sprint acceleration should aim to reduce contact time and improve ground force efficiency. It is important that even during the short sprints required for field sports, practitioners focus on good technique with short contact times.

Links

Aggregator Full Text

Authors+Show Affiliations

Lockie RG
Exercise and Sport Science, School of Environmental and Life Sciences, University of Newcastle, Ourimbah, Australia. robert.lockie@newcastle.edu.au
Murphy AJ
No affiliation info available
Knight TJ
No affiliation info available
Janse de Jonge XA
No affiliation info available

MeSH

AccelerationAthletesAthletic PerformanceBiomechanical PhenomenaBody Mass IndexHumansLegMaleMuscle StrengthMuscle, SkeletalRunningSportsTask Performance and AnalysisYoung Adult

Pub Type(s)

Journal Article

Language

eng

PubMed ID

21878822

Citation

Lockie, Robert G., et al. "Factors That Differentiate Acceleration Ability in Field Sport Athletes." Journal of Strength and Conditioning Research, vol. 25, no. 10, 2011, pp. 2704-14.
Lockie RG, Murphy AJ, Knight TJ, et al. Factors that differentiate acceleration ability in field sport athletes. J Strength Cond Res. 2011;25(10):2704-14.
Lockie, R. G., Murphy, A. J., Knight, T. J., & Janse de Jonge, X. A. (2011). Factors that differentiate acceleration ability in field sport athletes. Journal of Strength and Conditioning Research, 25(10), 2704-14. https://doi.org/10.1519/JSC.0b013e31820d9f17
Lockie RG, et al. Factors That Differentiate Acceleration Ability in Field Sport Athletes. J Strength Cond Res. 2011;25(10):2704-14. PubMed PMID: 21878822.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Factors that differentiate acceleration ability in field sport athletes. AU - Lockie,Robert G, AU - Murphy,Aron J, AU - Knight,Timothy J, AU - Janse de Jonge,Xanne A K, PY - 2011/9/1/entrez PY - 2011/9/1/pubmed PY - 2012/2/9/medline SP - 2704 EP - 14 JF - Journal of strength and conditioning research JO - J Strength Cond Res VL - 25 IS - 10 N2 - Speed and acceleration are essential for field sport athletes. However, the mechanical factors important for field sport acceleration have not been established in the scientific literature. The purpose of this study was to determine the biomechanical and performance factors that differentiate sprint acceleration ability in field sport athletes. Twenty men completed sprint tests for biomechanical analysis and tests of power, strength, and leg stiffness. The sprint intervals analyzed were 0-5, 5-10, and 0-10 m. The subjects were split into a faster and slower group based on 0- to 10-m velocity. A 1-way analysis of variance determined variables that significantly (p ≤ 0.05) distinguished between faster and slower acceleration. All subject data were then pooled for a correlation analysis to determine factors contributing most to acceleration. The results showed that 0- to 5-m (∼16% difference) and 0- to 10-m (∼11% difference) contact times for the faster group were significantly lower. Times to peak vertical and horizontal force during ground contact were lower for the faster group. This was associated with the reduced support times achieved by faster accelerators and their ability to generate force quickly. Ground contact force profiles during initial acceleration are useful discriminators of sprint performance in field sport athletes. For the strength and power measures, the faster group demonstrated a 14% greater countermovement jump and 48% greater reactive strength index. Significant correlations were found between velocity (0-5, 5-10, and 0-10 m) and most strength and power measures. The novel finding of this study is that training programs directed toward improving field sport sprint acceleration should aim to reduce contact time and improve ground force efficiency. It is important that even during the short sprints required for field sports, practitioners focus on good technique with short contact times. SN - 1533-4287 UR - https://www.unboundmedicine.com/medline/citation/21878822/Factors_that_differentiate_acceleration_ability_in_field_sport_athletes_ L2 - https://doi.org/10.1519/JSC.0b013e31820d9f17 DB - PRIME DP - Unbound Medicine ER -