Lifestyle8 min read

Exercise Timing: When to Workout Based on Your Chronotype

Morning or evening? The best time to gym depends entirely on your biology. Optimize your fitness gains.

Should you be at the gym at 6 AM or 6 PM? The answer depends entirely on your core body temperature and your specific chronotype.

The Importance of Body Temperature

Physical performance, strength, and injury resistance all peak when your core body temperature is at its highest. This temperature fluctuation is a primary marker of your circadian rhythm.

• **Lions**: You will perform best in the late morning, between 10 AM and 12 PM.

• **Bears**: Your peak physical window is in the late afternoon, between 4 PM and 6 PM.

• **Wolves**: You will feel strongest in the early evening, between 6 PM and 8 PM.

Tailoring Your Activity

Morning workouts are excellent for fasted cardio and mental clarity, while afternoon or evening workouts are better for heavy lifting and explosive movements. ARC tracks your specific energy curve to suggest exactly when you will have the highest output for your fitness routine.

EditorARC Scientific Team

Date Published2026-02-22

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