You push yourself above and beyond what most people are willing to go to, pressing beyond the safe limits of what your body can handle whenever you train. One of the means to accomplish this is by wearing heavy weights, no matter what you're doing.

You may take a -5 penalty to all d20 rolls for any number of actions. If you do so, you may later spend an action and two willpower points to receive a +5 bonus to all d20 rolls and a +5d10 bonus to all damage rolls for a number of actions equal to the number of actions you maintained the penalty.