Chrono-Exercise Medicine: Why Biological Timing Matters for Human Health

Area of Science:

• Exercise physiology
• Chronobiology
• Personalized medicine

Background:

• Traditionally, exercise medicine focuses on exercise parameters like intensity and duration.
• Emerging evidence highlights biological timing (circadian rhythms) as a key factor in exercise response.
• Circadian rhythms influence metabolism, muscle function, and adaptation to exercise.

Purpose of the Study:

• To propose "chrono-exercise medicine" as a framework integrating biological timing into exercise prescription.
• To explore how circadian phenotyping and molecular clocks can explain individual differences in exercise response.
• To identify challenges in implementing biologically informed exercise prescription.

Main Methods:

• Literature review and conceptual framework development.
• Discussion of circadian phenotyping and skeletal muscle molecular clocks.
• Exploration of temporal multi-omic approaches.

Main Results:

• Biological timing is a critical, yet often overlooked, factor in exercise adaptation.
• Exercise influences circadian organization, acting as a non-photic cue.
• Interindividual variability in exercise response can be understood through temporal biological markers.

Conclusions:

• Chrono-exercise medicine offers a personalized approach by considering the "when" of exercise.
• Future precision medicine requires integrating biological timing into exercise prescription.
• Addressing methodological and clinical challenges is crucial for advancing biologically informed exercise.