Beschreibung:
<jats:sec><jats:label /><jats:p>High intensity interval training (HIIT) leads to VO<jats:sub>2max</jats:sub> improvements in 2‐weeks (Talanian, 2007). Long term (≥ 4 months) exogenous hormone (EH) use can decrease VO<jats:sub>2max</jats:sub> by 11% (Casazza, 2002). It is unknown whether EH impairs exercise training induced adaptations.</jats:p></jats:sec><jats:sec><jats:title>PURPOSE</jats:title><jats:p>The purpose of this study was to investigate the effects of seven HIIT sessions over 2 weeks on maximal and submaximal (sub<jats:sub>max</jats:sub>) physiological responses to exercise in women taking EH.</jats:p></jats:sec><jats:sec><jats:title>METHODS</jats:title><jats:p>Sixteen healthy women of average fitness, VO<jats:sub>2max</jats:sub> = 40.29±7.51, volunteered for this study (n=8 EH, n=8CON). Prior to participating in the study, the EH women were taking a monophasic or triphasic oral contraceptive pill for ≥ 6 months and CON were regularly menstruating. VO<jats:sub>2max</jats:sub> and sub<jats:sub>max</jats:sub> testing (10% below VT<jats:sub>1</jats:sub>) were performed on a cycle ergometer pre and post HIIT. Statistical comparisons were made between EH and CON to determine the physiological adaptations that occurred with HIIT.</jats:p></jats:sec><jats:sec><jats:title>RESULTS</jats:title><jats:p>CON had a significant decrease in sub<jats:sub>max</jats:sub> HR (148±6.1vs136±4.7bpm, p=0.02), and an increase in O<jats:sub>2pulse</jats:sub> (10.36±.81vs10.98±.81 ml/bpm, p=0.02). The EH had a significant increase in dBP (59.7±3.0vs65.2±3.12mmHg). There were no other significant differences between groups.</jats:p></jats:sec><jats:sec><jats:title>CONCLUSION</jats:title><jats:p>EH use alters submax cardiovascular training responses without affecting VO2max. EH use blunts HR, dBP, and O2pulse adaptations to HIIT.</jats:p></jats:sec>