Which of the following is not a benefit of weight training? a) more lean muscle mass b) increased metabolism c) weakening of the bone

Weakening is not a benefit no matter what unless you are working against that thing, and even then it is not a benefit for everyone, meaning the answer is C) Weakening of the bone

increasing transnational kinetic energy. because the transnational kinetic energy formula consists of only two variables, mass and velocity, increasing one of those properties is the only way to increase an object's transnational kinetic energy. increases to mass and velocity, however, do not have the same impact.