Jornal Europeu de Biologia Experimental Acesso livre

Abstrato

Effects of the menstrual cycle phase on the blood lactate responses and exercise performance in active women

Azam. Abdollahpor, Nasim Khosravi and Nobakht Ramezani. Zahra1

The present study examined the effects of menstrual cycle phase on the blood lactate responses and exercise performance in university active women. Fourteen active eumenorrheic women (age 21 ± 1.8 yr) after to fill up questionnaire was selected randomly. After determination the phases of menstrual cycle, subjects were performed a graded maximal exercise test for two phases of follicular (days 7-11) and luteal (days 19-23).The body Fat (fat%),weight and height assessed before test .Blood lactate, VO₂max, time to exhaustion, estrogen and progesterone hormones were measured in the FT and LT phases. Rating of perceived exertion has assessed by Borg scale. The results showed no significant differences between the follicular and luteal phases in VO2max (31.26 ± 3.01& 30.41± 3.43 ml.kg¹Ãƒâ€“¿.min¹Ãƒâ€“¿ respectively), blood lactate ,maximal heart rate , time to exhaustion, and rating of perceived exertion ( p>0/05 ).In addition ,there was no significant orrelation between VO₂max and progesterone hormone in the luteal phase ( r =-./25, p>0/05 ). Data suggest that normal cyclic Variations in estrogen & progesterone are without significant effect on any measure of maximal exercise performance. We conclude that in this study, menstrual phase (follicular vs luteal) with menstrual status (eumenorrheic) no alters or limits exercise performance in female active.