Body recomposition—the simultaneous process of losing fat and gaining muscle—can result in visible muscle growth within 8 to 12 weeks, according to Shannon Ritchey, a doctor of physical therapy and founder of Evlo Fitness.
In plain English, body recomp involves building muscle and shedding fat at the same time through consistency rather than extremes.
According to the guidance, the timeline for body recomposition unfolds gradually over several months. In the first month, individuals may see early fat loss if they maintain a calorie deficit, while beginner exercisers might notice small muscle developments more quickly than longer-trained individuals.
By the second month, individuals begin to feel stronger as the nervous system adapts and coordination improves, potentially revealing muscle definition toward the end of the month. Month three brings likely visible muscle definition and continued fat loss, while month four and beyond see continued progress alongside normal slower or plateau phases.
Muscle tends to return faster during subsequent periods of recomposition because muscle fibers retain extra myonuclei, which act as the brains of the muscle and remain even if muscle mass is lost.
Rushing the process can ultimately cause delays. Overtraining can lead to injuries that sideline workouts, while undereating can prevent muscle growth or result in losing muscle. Proper nutrition and fueling are essential, as an overly large calorie deficit can cause individuals to lose both muscle and fat. Ultimately, achieving body recomposition requires sustainable changes in training, nutrition, and recovery.
