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Time-Dependent Endurance Exercise Improves Metabolic Health Through Circadian Rhythm Regulation in Mice
Yanqing Zhou1,2, Qianyun Cheng1, Zuoqing Yan2,3
1Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, NO. 130, Dongan Road, Xuhui District, Shanghai 200030, China.
Journal of Functional Morphology and Kinesiology
|June 25, 2026
Summary
Timing endurance exercise with your internal body clock enhances metabolic health. A functional circadian clock is crucial for maximizing exercise benefits on glucose and lipid metabolism.
Area of Science:
- Chronobiology
- Exercise Physiology
- Metabolic Health
Background:
- Circadian rhythms govern essential physiological processes like metabolism.
- The timing of physical activity may significantly impact metabolic outcomes.
- The precise role of the circadian clock in mediating exercise's metabolic benefits is not fully understood.
Purpose of the Study:
- To investigate if time-dependent endurance exercise improves metabolic health.
- To determine the role of the circadian clock in mediating these exercise-induced metabolic improvements.
- To compare the effects of exercise timing in wild-type and circadian-disrupted mice.
Main Methods:
- A 12-week endurance exercise protocol was conducted on wild-type and ClockΔ19 mice.
- Mice were exercised at specific times (ZT0 or ZT12) or remained sedentary.
- Metabolic parameters including body weight, glucose tolerance, and lipid profiles were assessed.
Main Results:
- Circadian-disrupted mice showed phase-dependent fatigue.
- Endurance exercise reduced weight gain in circadian-disrupted mice, irrespective of timing.
- Timed exercise in wild-type mice improved lipid regulation and glucose tolerance, benefits lost in circadian-disrupted mice.
Conclusions:
- Aligning exercise with the internal body clock maximizes metabolic benefits.
- A functional circadian clock is essential for time-dependent improvements in glucose and lipid metabolism.
- Some exercise benefits on metabolic health can occur independently of a functional circadian clock.
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