A recent study conducted by researchers at Oregon Health & Science University (OHSU) has found a potential link between misaligned circadian rhythms and raised metabolic risk factors in individuals with overweight and obesity. The study, published in The Journal of Clinical Endocrinology & Metabolism, suggests that these metabolic changes vary significantly between males and females.
Circadian rhythms are 24-hour cycles that regulate various bodily functions, including the sleep-wake cycle. The researchers recruited 15 females and 15 males with overweight and assessed their body composition and blood samples. They also measured their dim-light melatonin onset (DLMO), a marker of circadian rhythm phase.
The findings of the study indicated that misaligned males had higher levels of abdominal fat, blood fat (triglycerides), and a greater risk of metabolic syndrome. On the other hand, misaligned females had a higher percentage of overall body fat, higher blood sugar levels, and a higher resting heart rate.
The researchers hope that by optimizing circadian alignment, individuals with overweight or obesity may be able to reduce their risk of metabolic diseases. However, more research is needed to confirm these results. The study authors emphasized the importance of maintaining healthy sleep habits and a consistent sleep schedule to realign circadian rhythms.
Experts not involved in the study have suggested tips to help individuals get their internal body clock back on track, including maintaining a consistent sleep schedule, getting exposure to natural light, limiting screen time in the evening, and gradually adjusting bedtime and wake time. Additionally, avoiding caffeine before bedtime, creating a comfortable sleeping environment, and avoiding late napping or exercising may also help optimize sleep and circadian rhythms.
While the study provides valuable insights into the potential impact of circadian misalignment on metabolic health in individuals with overweight and obesity, further research is needed to fully understand the relationship between circadian rhythms, sleep, and metabolic health.