Body recomposition refers to increasing or maintaining lean mass while reducing fat mass, with results depending on training, diet, and time. This page provides a definition and practical context; it is not an individualized medical or nutrition prescription. Use the related tools and guides for calculations or programming decisions rather than treating a glossary definition as a result.
Who recomposition actually works for
This guide treats simultaneous muscle gain and fat loss as most realistic for three groups: complete beginners in their first several months of training, lifters returning after a long layoff, and people carrying a higher body-fat percentage. For lean, well-trained lifters that window narrows substantially, so this guide recommends they cycle deliberate deficits and surpluses instead of planning around simultaneous change.
Setting expectations for the timeline
Because recomposition moves both fat loss and muscle gain at a slower pace than a dedicated deficit or surplus alone, judging progress week to week is unreliable. Body-weight scales can stay flat for weeks while body composition genuinely shifts, so progress photos, measurements, and strength trends in the gym are more informative than the number on the scale over any single week.