
Bulking vs cutting: The science of body recomposition for men

Bulking and cutting work by deliberately shifting energy balance: a 250–500 calorie daily surplus supports muscle protein synthesis and hypertrophy, while a sustained calorie deficit drives fat oxidation but can increase muscle protein breakdown. The key to body recomposition is committing to one clear signal for 12–16 weeks—rather than chasing muscle gain and leanness at ...

