The Athletic career is the obvious choice as it is a pure fitness skill career in the bodybuilder path, with some charisma required for the alternative branch.
There is no way of earning money through the fitness skill alone, so you probably will want your sim to have a career. Traits:Īctive is obviously one of the best choices, as not only does it give you random energised buffs but it also means your sim will enjoy themselves as they work out, but there are plenty of other traits that can give you an energised buff or otherwise are helpful for this skill. Your sim can not die from being too energised, so the ideal is to stack as many energised and happy buffs as possible. Your sim will want to be very energised or energised as often as possible while working out as this will increase the rate in which they learn the skill.