AI Summary & Key Takeaways
AI InsightThe study's findings revealed no statistically significant differences in performance outputs, including jump (respectively; X2 = 0.348; X2 = 1.462; X2 = 1.724) and relative power (respectively; X2 =1.077; X2 = 0.00; X2 = 1.077), across the three phases of the menstrual cycle (p>0.05).
📌 3 Key Takeaways
Abstract
This study aimed to examine the effect of hormonal changes on jump and relative power during the menstrual cycle in volleyball players. Ten female volleyball players (21.10 ± 2.02 years) participated in the study voluntarily. The menstrual cycle of each player was recorded during the study. The participants performed jump performance three times (1) first test day was in the second day after the first menstrual bleeding, when the oestrogen levels begin to rise in the follicular phase, (2) the 14th day that was peak oestrogen in the ovulation phase, and (3) the 21st day that was peak progesterone in the luteal phase. All tests were conducted between 09:00 and 11:00 in the morning: squat jump, countermovement jump, and vertical jump. The flight heights were recorded for each jump, and the relative power for all tests was calculated using body weights. Differences in repeated measurements were tested using Friedman's analysis for independence. The study's findings revealed no statistically significant differences in performance outputs, including jump (respectively; X2 = 0.348; X2 = 1.462; X2 = 1.724) and relative power (respectively; X2 =1.077; X2 = 0.00; X2 = 1.077), across the three phases of the menstrual cycle (p>0.05). Consequently, it was determined that hormonal fluctuations in MD did not affect jumping and relative power performance. However, it was concluded that conducting a long-term or prospective study, rather than evaluating over a single cycle, might be important in understanding the effect.