(v) to exert your muscles to keep fit using gym weights and equipment; the main intention is to increase muscle mass and muscle endurance, but the activity may also increase physical attractiveness and one's ability to score
"Well Duncan, it seems as if the female specimens in this tavern have been glancing your way lately. Why, have you been exerting your bicep muscles by raising heavy objects?"
"Spot on, my dear chap! I have been railing this past week like a madman. But railing like a madman will do no good if you feed your body mutton lard and haggis. Why, you need to eat nutritious and healthy meals to maximize your effort in the weight room!"