Cardiorespiratory and Neuromuscular Improvements Plateau after 2 wk of Sprint Interval Training in Sedentary Individuals.
Med Sci Sports Exerc
; 56(5): 876-884, 2024 May 01.
Article
em En
| MEDLINE
| ID: mdl-38109197
ABSTRACT
INTRODUCTION:
Previous studies ranging from 2 to 12 wk of sprint interval training (SIT) have reported improvements in maximal oxygen uptake (VÌO 2max ) and neuromuscular function in sedentary populations. However, whether the time course of the changes in these variables correlates with greater training volumes is unclear.METHODS:
Thirteen sedentary participants performed three all-out training weekly sessions involving 15-s sprints interspersed with 2 min of recovery on a cycle ergometer. The 6-wk training program was composed of three identical blocks of 2 wk in which training volume was increased from 10 to 14 repetitions over the first four sessions and reduced to 8 in the last session. The power output and the heart rate (HR) were monitored during the sessions. The VÌO 2max , the power-force-velocity profile, and the isometric force were assessed every 2 wk from baseline.RESULTS:
A significant increase in VÌO 2max was observed from the second week plateauing thereafter despite four additional weeks of training. The dynamic force production increased from the second week, and the speed production decreased by the end of the protocol. The isometric force and the maximal power output from the power-force-velocity profile did not change. Importantly, the time spent at high percentages of the maximal HR during the training sessions was lower in the second and third training block compared with the first.CONCLUSIONS:
SIT resulted in an effective approach for rapidly increasing VÌO 2max , and no change in the isometric force was found; cycling-specific neuromuscular adaptations were observed from the second week of training. SIT may be useful in the short term, but further improvement of overall physical fitness might need other training modalities like endurance and/or resistance training.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Treinamento Resistido
/
Treinamento Intervalado de Alta Intensidade
Limite:
Humans
Idioma:
En
Revista:
Med Sci Sports Exerc
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
França