What recomposition means
Body recomposition is the goal of changing what your weight is made of rather than simply how much you weigh. Instead of chasing a lower number, you’re lowering body fat while holding onto — or adding — lean muscle. Because a pound of muscle and a pound of fat weigh the same, a successful recomp can leave the scale nearly unchanged while your shape, measurements, and strength all move in the right direction.
Why it’s a big deal on GLP-1s
Rapid weight loss of any kind — GLP-1s included — tends to come partly from lean mass, not just fat. That’s the concern behind headlines about muscle loss on these medications. The countermeasure is well established: eat enough protein and do regular resistance training while you lose. Do that, and a larger share of the loss comes from fat, which protects your metabolism and makes the results more durable.
Two tools make this concrete: the lean body mass calculator estimates how much of your weight is muscle, and the protein calculator sets a daily target to help preserve it. Recomp is the reason “just lose weight” is the wrong goal — what you lose matters as much as how much.