Shorter sprints elicit greater cardiorespiratory and mechanical responses with less fatigue during time-matched sprint interval training (sit) sessions

BENITEZ-FLORES, STEFANO; DE SOUSA, ARILSON F.M.; DA CUNHA TOTÓ, ERICK CARLOS; ROSA, THIAGO SANTOS; DEL ROSSO, SEBASTIAN; FOSTER, CARL; BOULLOSA, DANIEL

KINESIOLOGY

UNIV ZAGREB

Lugar: Zagreb; Año: 2018 vol. 50 p. 137 - 148

1331-1441

The aim of this study was to compare the physiological, mechanical and perceptual responses to two sprint interval training (SIT) sessions with very short vs. long sprints, and to verify if those differences could be reflected in measures of acute fatigue. Eleven physically active men performed, after the maximum oxygen consumption (VO2max) determination, SIT5s (16×5s with 24s of recovery) and SIT20s (4×20s with 120s of recovery) in random order on a cycle ergometer. Physiological, mechanical, and perceptual responses were evaluated during and after the sessions. The countermovement jump (CMJ) height and autonomic control of heart rate (HR) were evaluated before and after the sessions. Diet was also controlled through recall questionnaires. During the training, SIT5s exhibited greater HR, VO2, power output, and total work (TW) (p