Do boys gain weight in stage 2?

Question:

Do boys get fat and gain weight in stage 2? I’ve heard that boys start to get plump and chubby right before a growth spurt that slims them down.

Answer:

While it is not universal, many boys get noticeably chubbier (but not necessarily fat) during stage 2. The body builds up reserves of energy in the form of fat to fuel the growth that takes place during stage 3.