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Analysis of lower limb work-energy patterns in world-class race walkers.
- Source :
- Journal of Sports Sciences; May2017, Vol. 35 Issue 10, preceding p960-966, 7p, 2 Charts, 3 Graphs
- Publication Year :
- 2017
-
Abstract
- The aim of this study was to analyse lower limb work patterns in world-class race walkers. Seventeen male and female athletes race walked at competitive pace. Ground reaction forces (1000 Hz) and highspeed videos (100 Hz) were recorded and normalised joint moments, work and power, stride length, stride frequency and speed estimated. The hip flexors and extensors were the main generators of energy (24.5 J (±6.9) and 40.3 J (±8.3), respectively), with the ankle plantarflexors (16.3 J (±4.3)) contributing to the energy generated during late stance. The knee generated little energy but performed considerable negative work during swing (-49.1 J (±8.7)); the energy absorbed by the knee extensors was associated with smaller changes in velocity during stance (r = .783, P < .001), as was the energy generated by the hip flexors (r = -.689, P = .002). The knee flexors did most negative work (-38.6 J (±5.8)) and the frequent injuries to the hamstrings are probably due to this considerable negative work. Coaches should note the important contributions of the hip and ankle muscles to energy generation and the need to develop knee flexor strength in reducing the risk of injury. [ABSTRACT FROM AUTHOR]
- Subjects :
- KNEE physiology
LEG physiology
ANKLE physiology
HIP joint physiology
ANTHROPOMETRY
STATISTICAL correlation
DIGITAL diagnostic imaging
DYNAMICS
EXERCISE physiology
GROUND reaction forces (Biomechanics)
RANGE of motion of joints
KINEMATICS
MUSCLE contraction
PROBABILITY theory
VIDEO recording
WALKING (Sports)
EFFECT sizes (Statistics)
ELITE athletes
EXERCISE intensity
DATA analysis software
DESCRIPTIVE statistics
PLANTARFLEXION
Subjects
Details
- Language :
- English
- ISSN :
- 02640414
- Volume :
- 35
- Issue :
- 10
- Database :
- Complementary Index
- Journal :
- Journal of Sports Sciences
- Publication Type :
- Academic Journal
- Accession number :
- 121304050
- Full Text :
- https://doi.org/10.1080/02640414.2016.1206662