You are recomping, losing fat and gaining muscle at the same time, so weight stays flat while your shape changes.
This is body recomposition, and it is a good sign. Muscle and fat weigh the same per kilogram but muscle is denser and takes up less space, so you can swap fat for muscle and look leaner while the scale barely moves. It is most common in newer lifters, those returning after a break, and people eating enough protein around maintenance calories. Track photos, measurements, and strength instead of only weight.
You are gaining muscle and losing fat simultaneously. A kilo of muscle occupies noticeably less volume than a kilo of fat, so your waist shrinks and your arms fill out even though net weight holds steady. The scale simply cannot see this trade.
Recomp is strongest for beginners, people returning from time off, and those hitting protein of 1.6 to 2.2 g per kg near maintenance calories. It slows as you get more advanced, when gaining and losing at once becomes harder and you may need to pick a bulk or cut.
The scale is one of the worst tools here. Progress photos in the same light, waist and limb measurements, and your working weights in the log tell the real story. Rising strength with a flat scale means you are building muscle while dropping fat.
You are recomping, losing fat and gaining muscle at the same time, so weight stays flat while your shape changes.
