adductor arm beef beefiness biceps brawn brawniness buccinator effort elasticity elbow grease endeavor energy exert strength exertion force gemellus gluteus maximus hard pull heftiness huskiness infraspinatus intercostal involuntary muscle latissimus dorsi levator long pull masseter mentalis might might and main muscularity musculature mylohyoid nasalis nerve and sinew oblique occipitalis omohyoid pains pectineus pectoralis peroneus physique potency power sinew sinewiness sinews sphincter strength strong arm strong-arm tensor thew thewiness thews tone trapezius triceps trouble use force voluntary muscle