KINEMATICS THAT DIFFERENTIATE THE BEACH FLAGS START BETWEEN ELITE AND NON-ELITE SPRINTERS
Journal Title: Biology of Sport - Year 2013, Vol 30, Issue 4
Abstract
This study differentiated the kinematics of the beach flags sprint start between five elite (three males, two females; age = 21.2 ± 2.6 years; height = 1.71 ± 0.04 m; mass = 66.2 ± 5.9 kg) and five non-elite (three males, two females; age = 20.4 ± 1.7 years; height = 1.69 ± 0.08 meters [m]; mass = 61.6 ± 5.7 kilograms) sprinters. A high-speed camera filmed the start. Timing gates recorded the 0-2, 0-5, and 0-20 m intervals. Data included body position during the start and at take-off; start time; first step length; and sprint times. A Mann-Whitney U-test determined significant (p < 0.05) between-group differences; effect sizes (ES) were also calculated. Elite sprinters had a greater take-off trajectory angle (p = 0.01; ES = 2.57), and were faster over the 0-2 (p = 0.02; ES = 1.77), 0-5 (p = 0.05; ES = 1.20), and 0-20 m (p = 0.02; ES = 1.83) intervals. Large effects were found for: greater take-off swing leg hip flexion (ES = 1.13) and trunk lean (ES = 1.37); longer duration start time (ES = 1.33); and longer first step length (ES = 1.23) in elite sprinters. A longer start time assists with force generation, which in conjunction with increased hip flexion, could translate to a longer first step. Increased trunk lean shifts the take-off trajectory angle towards the horizontal. A greater trajectory angle at start take-off, which could be advantageous for force production during sprint performance, is likely necessary for beach flags.
Authors and Affiliations
Robert Lockie, William Vickery
Exercise characteristics of physical education trainee teachers in singapore and the validity of field aerobic and anaerobic performance tests
The study provides exercise data on the aerobic (shuttle-run test) and anaerobic (stair-run test) field performances of physical education trainee teachers in Singapore and validity data on the field performance tests. F...
SERUM LEVEL COMPARISONS OF C-REACTIVE PROTEIN(HS-CRP) AND URIC ACID IN SOCCER PLAYERS AND NONATHLETES
In the present study, we compare the plasma concentration of CRP, uric acid and some other markers between soccer players and nonathletes. Also we intended to evaluate blood markers relation with fitness and anthropometr...
<strong>THE EFFECT OF AEROBIC CONTINUOUS AND INTERVAL TRAINING</strong><strong> ON THE LEFT VENTRICULAR STRUCTURE AND FUNCTION</strong><strong> OF MALE NON-ATHLETES </strong>
Exercise plays an important role to improve cardiovascular performance. The aim of this study was to compare the effect of aerobic continuous and interval training on the left ventricular structure and function. Twenty u...
ACCEPTED LEVEL OF RISK OF DOPING USE IN THE VIEW OF YOUNG ATHLETES
The paper is a continuation of studies aimed at verifying the hypothesis from decision theory stating that the risk in action is the greatest when the probability of loss is high, and the higher the value attached to tha...
The effect of anaerobic and aerobic tests on autonomic nervous system activity in healthy young athletes
INTRODUCTION. In the evaluation of physical efficiency in professional athletes two tests are used: Wingate test (WT) and incremental test for maximal oxygen uptake (IT). In the former anaerobic power is evaluated and in...