Which term refers to the idea that fitness can decline when training stops?

• A. Detraining
• B. Diminishing Returns
• C. Reversibility
• D. Cryotherapy

Answer: (C)

When you stop training, your body tends to revert toward its previous baseline because the adaptations from training aren’t permanent without ongoing stimulus. This is known as reversibility. It captures the idea that gains in cardiovascular fitness, muscle strength, and other adaptations can fade when training stops, or with a break in training, unless you maintain some level of activity. Detraining is closely related, describing the actual loss, but reversibility is the established term for the concept that those adaptations are reversible when the stimulus is removed. Diminishing returns describes how gains slow over time with continued training, not what happens after you stop, and cryotherapy has no relevance to the fading of training effects.