Effect of a fatiguing ultratrail on the graded energetically optimal stride frequency; International Journal of Sports Physiology and Performance; Vol. 15, iss. 9

Effect of a fatiguing ultratrail on the graded energetically optimal stride frequency; International Journal of Sports Physiology and Performance; Vol. 15, iss. 9

書目詳細資料
Parent link:International Journal of Sports Physiology and Performance
Vol. 15, iss. 9.— 2020.— [P. 1340-1343]
企業作者: Национальный исследовательский Томский политехнический университет Школа базовой инженерной подготовки Отделение физической культуры
其他作者: Vernillo G. Gianluca, Mater A., Doucende G. Gregory, Cassirame J. Johan, Mourot L. Laurent
總結:Title screen
Purpose: To study the consequences of a fatiguing ultratrail run of 6 hours on self-optimizing capability during uphill and downhill (DR) running. Methods: The authors collected temporal stride kinematics and metabolic data in 8 (experimental group) male runners before and after the ultratrail run and in 6 (control group) male ultramarathon runners who did not run but stayed awake and performed normal, daily physical activities avoiding strenuous exercises over the 6-hour period. For each subject, preferred and optimal stride frequencies were measured, where stride frequency was systematically varied above and below the preferred one (±4% and ±8%) while running 3 conditions on level, 5% uphill, or 5% DR in a randomized order. Results: Preferred and optimal stride frequencies across grade, group, and time showed no significant differences (P ? .184). Metabolic cost and the energetically optimum metabolic cost showed a grade ? group ? time interaction (P ? .011), with an ?11% increase in the 2 variables only during the DR bouts (P ? .037). Conclusions: Despite maintaining similar dynamics of stride frequency adjustments during the DR bout, the experimental group was not able to optimize its gait. This suggests that the DR section of ultratrail runs can introduce a perturbing factor in the runners’ optimization process, highlighting the need for incorporating DR bouts in the training programs of ultratrail runners to minimize the deleterious effects of DR on the energetically optimal gait.
語言:英语
出版: 2020
主題:
электронный ресурс
труды учёных ТПУ
metabolic cost
slope
ultramarathon
optimization
在線閱讀:https://doi.org/10.1123/ijspp.2019-0666
格式: 電子 Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=666598

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