Sport Biomechanics Research on the Key Technique of Race-Walking Athletes in China

Author(s):  
Stein Gerrit Paul Menting ◽  
Brian Hanley ◽  
Marije Titia Elferink-Gemser ◽  
Florentina Johanna Hettinga

1989 ◽  
Vol 23 (4) ◽  
pp. 250-254 ◽  
Author(s):  
T Yoshida ◽  
M Udo ◽  
K Iwai ◽  
I Muraoka ◽  
K Tamaki ◽  
...  

Nutrients ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 2767
Author(s):  
Louise M. Burke ◽  
Rebecca Hall ◽  
Ida A. Heikura ◽  
Megan L. Ross ◽  
Nicolin Tee ◽  
...  

Given the importance of exercise economy to endurance performance, we implemented two strategies purported to reduce the oxygen cost of exercise within a 4 week training camp in 21 elite male race walkers. Fourteen athletes undertook a crossover investigation with beetroot juice (BRJ) or placebo (PLA) [2 d preload, 2 h pre-exercise + 35 min during exercise] during a 26 km race walking at speeds simulating competitive events. Separately, 19 athletes undertook a parallel group investigation of a multi-pronged strategy (MAX; n = 9) involving chronic (2 w high carbohydrate [CHO] diet + gut training) and acute (CHO loading + 90 g/h CHO during exercise) strategies to promote endogenous and exogenous CHO availability, compared with strategies reflecting lower ranges of current guidelines (CON; n = 10). There were no differences between BRJ and PLA trials for rates of CHO (p = 0.203) or fat (p = 0.818) oxidation or oxygen consumption (p = 0.090). Compared with CON, MAX was associated with higher rates of CHO oxidation during exercise, with increased exogenous CHO use (CON; peak = ~0.45 g/min; MAX: peak = ~1.45 g/min, p < 0.001). High rates of exogenous CHO use were achieved prior to gut training, without further improvement, suggesting that elite athletes already optimise intestinal CHO absorption via habitual practices. No differences in exercise economy were detected despite small differences in substrate use. Future studies should investigate the impact of these strategies on sub-elite athletes’ economy as well as the performance effects in elite groups.


2017 ◽  
Vol 5 ◽  
pp. 212-221
Author(s):  
Jakub Jelonek ◽  
Wiesław Pilis ◽  
Maciej Świat ◽  
Cezary Michalski ◽  
Krzysztof Stec

2018 ◽  
Vol 36 (19) ◽  
pp. 2235-2241 ◽  
Author(s):  
Josu Gomez-Ezeiza ◽  
Jon Torres-Unda ◽  
Nicholas Tam ◽  
Jon Irazusta ◽  
Cristina Granados ◽  
...  

Proceedings ◽  
2020 ◽  
Vol 49 (1) ◽  
pp. 79
Author(s):  
Teodorico Caporaso ◽  
Stanislao Grazioso ◽  
Dario Panariello ◽  
Giuseppe Di Gironimo ◽  
Antonio Lanzotti

Race walking is a discipline in which the best chronometric performance is constrained by infringements. Currently, the judgment and training of race walkers is entrusted to subjective observations made by judges. In this paper, with the objective of supporting coaching and judging, we present a wearable inertial sensor system (IART) for the evaluation of performances and infringements in race walking. The system is composed of an inertial sensor positioned close to the center of mass of the subject and a management unit designed for coaches and judges. IART allows: (i) a step sequence classification according to the competition rules; (ii) a customized assessment of elite race walkers based on key performance and infringement indices. The system is experimentally validated in field conditions by nine world-class Olympic race walkers. The results show that IART improves the current evaluation of step sequences and offers a meaningful support for the overall evaluation of the technical gesture.


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