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![Changes in concentrations of estrogen and progesterone during the menstrual cycle. Estrogen concentration rises and drops sharply by the end of the follicular phase. It rises again along with progesterone, and both drop by the end of the luteal phase. Estrogen and progesterone concentrations are both low during menses. Modified from [22]. Linear regression was performed to determine the ratio of change of each measurement during the fatiguing exercise. To allow comparisons between the slopes of different regressions, the angular coefficient was normalized using the linear coefficient (initial value) of the regression line. Statistical Analysis – The normalized value of CV of each group of data (F1, F2, L1 and L2) was tested with t-test against all the other groups.](profile/Sauro-Salomoni-2/publication/228364275/figure/fig1/AS:393646873563148@1470864136773/Changes-in-concentrations-of-estrogen-and-progesterone-during-the-menstrual-cycle.png)
Changes in concentrations of estrogen and progesterone during the menstrual cycle. Estrogen concentration rises and drops sharply by the end of the follicular phase. It rises again along with progesterone, and both drop by the end of the luteal phase. Estrogen and progesterone concentrations are both low during menses. Modified from [22]. Linear regression was performed to determine the ratio of change of each measurement during the fatiguing exercise. To allow comparisons between the slopes of different regressions, the angular coefficient was normalized using the linear coefficient (initial value) of the regression line. Statistical Analysis – The normalized value of CV of each group of data (F1, F2, L1 and L2) was tested with t-test against all the other groups.
Source publication
The scientific community has great interest on the study of lesions and muscle pain, due to its relevance on ergonomics, sports, and chronic pain treatment. Some studies report a higher capacity of muscular resistance on women. This higher endurance can lead to lesions due to the continuous state of activation of the muscles. Prior studies have rep...
Contexts in source publication
Context 1
... follicular and luteal phases were roughly determined and the data was then divided in four groups: F1 and F2 for follicular phase and L1 and L2 for luteal phase, as illustrated in Figure 1. ...
Context 2
... injuries are the ones most commonly seen in exercising populations. Figure 1 shows that the phases when higher fatigability is observed (F2 and L2) coincide with sharp estrogen reduction. Estrogen has direct effects on muscle, and fluctuation in estrogen and other female sex hormone levels may play a role in dynamic muscle control [17]. ...
