NCT06311539

The Effect of Circadian Rhythm on Physical Performance in Healthy Male Individuals

The Effect of Chronotype and Circadian Rhythm on Physical Performance in Healthy Male Individuals

• Status: Unknown
• Phase: N/A
• Study type: Interventional
• Enrollment: 60 (estimated)
• Sponsor: Istanbul Bilgi University · Academic / Other
• Sex: Male
• Age: 18 Years – 30 Years
• Healthy volunteers: Accepted

Summary

Little is known about optimizing the timing of exercise periods to maximize the health benefits of exercise. Furthermore, exercise is a potent modulator of skeletal muscle metabolism and it is clear that skeletal muscle has a robust circadian profile. Circadian rhythms can be observed in behavior, physiology, and metabolism. Various studies show that exercise changes the rhythm of the clock machines in skeletal muscle. Studies examining the relationship between exercise, especially strength training, and circadian rhythm are quite limited in the literature. Although some studies have shown that force peaks in the afternoon/evening hours, regardless of muscle group and contraction speed, there are no studies on how much this time interval varies from person to person and chronotype. The aim of this study is to investigate to what extent strength training given at appropriate times for morning, evening and intermediate chronotypes creates changes in performance in healthy adult male individuals.

Detailed description

After participants are informed about the research, evaluation and exercise protocol, their signed consent will be obtained. The Morningness-Eveningness Questionnaire will be applied until 30 participants with morning type and 30 evening type chronotypes are reached. (Estimated for 100 students) After determining 30 morning type and 30 evening type participants, isokinetic evaluations will be made and vertical jump heights will be measured (T0). Then, 15 morning type participants will be included in the morning exercise program (08:00) and 15 morning type participants will be included in the evening exercise program (18:00). 15 evening type participants will be included in the morning exercise program (08:00) and 15 evening type participants will be included in the evening exercise program (18:00). Thus, some of the participants from both morning and evening groups will be included in strength training for 6 weeks, at a time appropriate to their chronotypes, and some at a time incompatible with their chronotypes. Isokinetic evaluations and vertical jump height measurements will be repeated at the end of the strengthening exercise program, which will last 3 days a week for 6 weeks, a total of 18 sessions.

Conditions

• Chronotype
• Exercise

Interventions

Type	Name	Description
OTHER	Theraband Strengthening Exercise Program	Resisted knee flexion in prone position and resisted knee extension in seated position (for dominant leg) and bilateral squats were practiced in 3 sets of 12 repetitions. Participants rested for 30 seconds between sets. The program, which lasted approximately 30 minutes in total, continued for a total of 6 weeks, the first 3 weeks with the red theraband and the last 3 weeks with the black theraband. 15 morning type participants will be included in the morning exercise program (08:00) and 15 morning type participants will be included in the evening exercise program (18:00). 15 evening type participants will be included in the morning exercise program (08:00) and 15 evening type participants will be included in the evening exercise program (18:00).

Timeline

• Start date: 2024-04-01
• Primary completion: 2024-08-01
• Completion: 2024-10-01
• First posted: 2024-03-15
• Last updated: 2024-03-15