Name: LETÍCIA VELTEN
Publication date: 29/08/2024
Examining board:
Name |
Role |
|---|---|
| DANILO SALES BOCALINI | Examinador Interno |
| JONATO PRESTES | Examinador Externo |
| RICHARD DIEGO LEITE | Presidente |
| ROGER LYRIO DOS SANTOS | Examinador Externo |
Summary: The menstrual cycle (MC) is a fundamental component of the female reproductive system. Its main hormones, estradiol and progesterone, can influence physiological parameters in the central nervous system and muscle function; however, their effects on performance during resistance exercise are still ambiguous. Thus, we investigated strength and muscle strength endurance during the six phases of the MC through isokinetic tests. Eleven eumenorrheic women trained in resistance training performed five knee extensions and flexions at angular speeds of 60o, 120o, 240o and 300o.s-1 to evaluate maximum peak torque, rating perceived exertion (RPE) and rating perceived pain (RPP) after each speed. For strength resistance, a protocol of sixty repetitions at an angular speed of 240o.s-1 was used, where peak torque for extension and flexion, total work, percentage of work fatigue, RPE, RPP after each speed and blood lactate concentration were evaluated before and after. Data are presented as mean and standard deviation. The Shapiro Wilk normality test was performed. One-way repeated measures ANOVA was used to analyze the six phases of the CM followed by Bonferroni post hoc and the effect size (2p). No statistical difference was observed for peak torque in knee extension and flexion at angular speeds of 60o, 120o, 240o and 300o.s-1 and there was no difference in RPE and RPP (p>0.05). For strength endurance, there was no difference in the parameters evaluated in the sixty repetition test, in the RPE and RPP (p>0.05). Blood lactate levels were higher in the post-period compared to the pre-period (p<0.05). The results indicate that strength and muscle strength endurance are not affected by the phases of the MC in women trained in resistance training.
Keywords: eumenorrheic woman; resistance training; isokinetic test; sixty repetition protocol.
