Gür H
Department of Sports Medicine, Medical School of Uludağ University, Bursa, Turkey.
Arch Phys Med Rehabil. 1997 May;78(5):501-5. doi: 10.1016/s0003-9993(97)90164-7.
To investigate the effects of menstrual cycle on the reliability of concentric (CON) and eccentric (ECC) isokinetic measurements and reciprocal moment ratios in knee muscles.
Repeated measurements.
A university exercise physiology laboratory.
Sixteen healthy sedentary women volunteers, aged 24 to 35 years, who had regular menstrual cycle (ranging from 24 to 32 days).
Subjects were tested at 60 degrees/sec (4 repetitions) and 180 degrees/sec (20 repetitions) of angular velocities for CON and ECC tests at the menstrual (MP, days 1 to 3), follicular (FP, days 7 to 10), and luteal phases (LP, 19 to 21). Blood samples were analyzed for sex hormones at the FP and LP.
ECC and CON peak torques and total works, and their reciprocal ratios in dominant knee muscles, were not significantly different among the phases by ANOVA. Intraclass correlation coefficients (ICCs) among the phases for peak torque and total work of knee extensors in both angular velocities were in the range of .68 to .91 and .45 to .84 for CON and ECC tests, respectively. However, it was in the range of .03 to .72 and .65 to .94 for CON and ECC tests of knee flexors, respectively. In addition, there were no significant correlations between sex hormones and tested variables.
The results suggest that the phase of the menstrual cycle should not be taken into account in isokinetic measurements.
研究月经周期对膝关节肌肉等速向心（CON）和离心（ECC）测量的可靠性以及交互力矩比的影响。
重复测量。
大学运动生理学实验室。
16名健康的久坐女性志愿者，年龄在24至35岁之间，月经周期规律（24至32天）。
在月经周期的月经期（MP，第1至3天）、卵泡期（FP，第7至10天）和黄体期（LP，第19至21天），以60度/秒（4次重复）和180度/秒（20次重复）的角速度对受试者进行CON和ECC测试。在FP和LP期采集血样分析性激素。
通过方差分析，各阶段间优势膝关节肌肉的ECC和CON峰值扭矩、总功及其交互比无显著差异。两种角速度下膝关节伸肌峰值扭矩和总功在各阶段间的组内相关系数（ICC），CON测试在0.68至0.91之间，ECC测试在0.45至0.84之间。然而，膝关节屈肌的CON和ECC测试的ICC分别在0.03至0.72和0.65至0.94之间。此外，性激素与测试变量之间无显著相关性。
结果表明，在等速测量中不应考虑月经周期阶段。
