One of the most evidence-supported practices in PE is the deconditioning break — intentionally stopping all PE for a period of weeks to months and then restarting.
THE THEORY:
The body adapts to consistent stress and stops responding. A break allows the tissue to 'forget' the stress stimulus, so when you restart the tissue responds again as if to a new stimulus. This is a recognized principle in physical training — periodization and deload weeks serve the same function.
TYPICAL PROTOCOL:
Some PE veterans take 4-8 week complete breaks every 6-12 months. When they restart they often report renewed responsiveness and resumed progress after a plateau.
THE HONEST CAVEAT:
This assumes there were gains to begin with and that the plateau was truly adaptation rather than reaching a genetic ceiling. Not every plateau is adaptation — some are just the limit of what PE can do for a given individual.
— SafeAndSlow_Terry