Conclusion the outbreak of angina pectoris in the CHD patients has obvious day and night rhythm.

结论冠心病患者的心绞痛发作有明显的昼夜分布节律。

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AIM:To investigate the relationship between day-night rhythm of blood pressure and ambulatory arterial stiffness index(AASI)in hypertensive elderly subjects.

目的探讨老年高血压病患者血压昼夜节律与动态动脉硬化指数的关系。

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The stem sap flow of T. ramosissima presented a single-peaked curve, with an obvious day and night variation rhythm and fluctuated with environment factors.

多枝柽柳的茎干液流呈单峰曲线型，有明显的昼夜变化规律，茎干液流随环境因子变化而波动；

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"Exercise is known to help with sleep if you don't do it just before bedtime, " possibly because it promotes overall good health and helps enhance the body's circadian rhythm, which promotes activity during the day and resting at night, says Rapoport.

CNN: Exercise plus sleep may lower cancer risk in women