SOMETHING I’ve found many people still don’t quite understand about training (which shouldn’t be confused with exercising) is that training doesn’t get you stronger or fitter. What does get you stronger or fitter or faster or whatever your goal is, is your recovery from training.
Rest doesn’t mean doing nothing. Recovery comes in many guises: sleep; rest; good nutrition; stretching; lighter exercise; mobility work; massage; yoga. Understand why you train and do what you do.
Continual training without any recovery can only lead to either burnout or injury. But I encounter so many individuals who are convinced or fear any benefit from training will be lost if they skip a session.
It is always worth remembering that sometimes less is more.