During exercise, you create micro-damage and deplete your reserves. It's during rest that your body repairs, strengthens, and adapts. Without that time, adaptation never happens and fatigue builds up.
Total rest or active recovery?
Both have their place. Full rest lets your body recover completely. Active recovery (walking, light cycling, mobility work) boosts circulation without adding load. Alternating between the two based on your fatigue level is ideal.

Scheduling your rest days right
Rather than a rigid schedule, listen to the signals: a HRV low, a resting heart rate high levels or poor sleep call for a lighter day.
Dosing with KEORA
The KEORA Ring calculates your recovery every morning and tells you whether the day calls for effort or rest. Enough to avoid the overtraining and make progress with more peace of mind.
Rest isn't the enemy of performance. It's the condition for it.