Oral Contraceptive Use Dampens Physiological Adaptations to Sprint Interval Training.
Med Sci Sports Exerc
; 49(4): 717-727, 2017 04.
Article
em En
| MEDLINE
| ID: mdl-27898641
ABSTRACT
PURPOSE:
Oral contraceptive (OC) use reduces peak aerobic capacity (VËO2peak); however, whether it also influences adaptations to training has yet to be determined. This study aimed to examine the influence of OC use on peak performance (peak power output [PPO]) and physiological adaptations (VËO2peak and peak cardiac output [QËpeak]) after sprint interval training (SIT) in recreationally active women.METHODS:
Women taking an OC (n = 25) or experiencing natural regular menstrual cycles (MC; n = 16) completed an incremental exercise test to assess VËO2peak, PPO, and QËpeak before, immediately after, and 4 wk after 12 sessions of SIT. The SIT consisted ten 1-min efforts at 100% to 120% PPO in a 12 work-rest ratio.RESULTS:
Though VËO2peak increased in both groups after SIT (both P < 0.001), the MC group showed greater improvement (OC, +8.5%; MC, +13.0%; P = 0.010). Similarly, QËpeak increased in both groups, with greater improvement in the MC group (OC, +4.0%; MC, +16.1%; P = 0.013). PPO increased in both groups (OC, +13.1%; MC, +13.8%; NS). All parameters decreased 4 wk after SIT cessation, but remained elevated from pretraining levels; the OC group showed more sustained training effects in VËO2peak (OC, -4.0%; MC, -7.7%; P = 0.010).CONCLUSION:
SIT improved peak exercise responses in recreationally active women. However, OC use dampened VËO2peak and QËpeak adaptation. A follow-up period indicated that OC users had spared VËO2peak adaptations, suggesting that OC use may influence the time course of physiological training adaptations. Therefore, OC use should be verified, controlled for, and considered when interpreting physiological adaptations to exercise training in women.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Adaptação Fisiológica
/
Anticoncepcionais Orais
/
Desempenho Atlético
/
Treinamento Intervalado de Alta Intensidade
Limite:
Adult
/
Female
/
Humans
Idioma:
En
Ano de publicação:
2017
Tipo de documento:
Article