I guess we have a different definition of rail-thin, because I would not use it to describe anyone with bulging muscles. I also have trouble envisioning a 90-lb stay-puft woman of the same height.
Muscle is denser than fat. You can easily replace body fat with equivalent volume of muscle and suddenly come out denser (by quite a bit even). If the muscle you’re building is the non-bulky slow twitch variety, it won’t even be visible to casual inspection underneath that little layer of remaining fat you’re going to have left.
deleted by creator
I guess we have a different definition of rail-thin, because I would not use it to describe anyone with bulging muscles. I also have trouble envisioning a 90-lb stay-puft woman of the same height.
deleted by creator
Muscle is denser than fat. You can easily replace body fat with equivalent volume of muscle and suddenly come out denser (by quite a bit even). If the muscle you’re building is the non-bulky slow twitch variety, it won’t even be visible to casual inspection underneath that little layer of remaining fat you’re going to have left.