The Effect of Cardiovascular Responses after Aerobic Exercise in Menstrual Cycle

Purpose: We investigated the effect of menstrual cycle on the cardiovascular responses during recovery period from exercise. 10 healthy women were participated in the early follicular phase (EP: low estrogen and low progesterone: 1 - 4 days) and the late follicular phase (LP: high estrogen and low progesterone: 10 - 13 days) during menstrual cycle. Methods: All subjects completed a graded cycling exercise testing to determine the relative exercise intensity. All subjects were assessed systolic blood pressure (SBP), diastolic blood pressure (DBP), mean arterial pressure (MAP), heart rate (HR), stroke volume (SV), cardiac output (CO), and total vascular conductance (TVC) at resting and during recovery period from moderated cycling exercise during EP and LP. Results: During EP, compared with LP, resting SBP and MAP were higher and TVC was lower (p p Conclusions: This study could be increased the peripheral vasoconstriction in low estrogen levels. And during early follicular phase with low estrogen level, it may maintain an increased blood pressure during recovery period following cycling. We suggest that the timing of the menstrual cycle should be considered when measuring blood pressure during clinical exercise testing.

一颗10.04克拉蓝色钻石的鉴别

天然蓝色钻石在自然界极为罕见,是最珍贵的天然宝石。本文对Ⅱb型10.04克拉天然蓝色钻石进行宝石学和谱学特征测试。该钻石在高能短波(<230 mm)紫外光下呈蓝白色磷光。光致发光光谱呈现3H(503.4 mm)、540.7 nm、NV0(574.8mm)、648.2 nm、CR1(740.9 nm)和776.5 nm处发光峰。样品中检测到较强的3H发光峰(503.4 nm)。6482m和776.5 nm发光峰归于硼相关缺陷。