Influence of Circadian Rhythm Disruptions on Exercise Endurance, Blood Pressure and Heart Rate after Exercise in Rats
10.3969/j.issn.1006-9771.2018.01.006
- VernacularTitle:昼夜节律紊乱对大鼠运动耐力、运动后血压和心率的影响
- Author:
Yi LI
1
;
Wen-Zhu WANG
;
Yu-Ge ZHANG
;
Jia-Yi SHEN
;
Tong ZHANG
Author Information
1. 首都医科大学康复医学院
- Keywords:
hypertension;
circadian rhythm disruptions;
exercise endurance;
blood pressure;
heart rate;
rats
- From:
Chinese Journal of Rehabilitation Theory and Practice
2018;24(1):29-36
- CountryChina
- Language:Chinese
-
Abstract:
Objective To observe the influence of circadian rhythm disruptions on exercise capability in rats. Methods A total of 30 spontaneously hypertensive rats (SHR) and age and weight matched homologous normal blood pressure WKY rats were randomly divided into normal circadian rhythm group (control group), twelve hours cir-cadian rhythm disruption group (observation group 1), six hours circadian rhythm disruption group (observation group 2). Each group included ten SHR rats and WKY rats, changing the light/dark time to construct circadian rhythm disruption model. Exercise endurance, blood pressure and heart rate after exhaustion were measured be-fore and one, two and three months after modeling. Results The interaction of time and circadian rhythm was significant on the exhaustion time of SHR rats (F=2.409, P=0.047). After three months of modeling, the exhaustion time of the control group was more than that of the obser-vation groups 1 and 2 (F=4.290, P=0.032). The interaction of time and circadian rhythm was not significant on the exhaustion time of WKY rats (F=0.717, P=0.638), there was no significant difference in the exhaustion time among groups (P>0.05). For SHR rats, after three months of modeling, the systolic pressure, diastolic pressure and mean arterial pressure after exhaustion of the observation group 1 were higher than those of the control group and the observation group 2 (P<0.05), the heart rate of the observation groups 1 and 2 was higher than that of the control group (P<0.05). But there was no significant difference in the systolic pressure, diastolic pressure, average arterial pressure and heart rate of WKY rats among groups (P>0.05). Conclusion Circadian rhythm disruptions can reduce the exercise endurance of SHR rats, which may be related to the cardiovascular function impairment.
