1.   He shrugged off his packs and flexed tired shoulders.

2.   He tugged on the bill of his batting helmet, flexed his shoulders and began punishing baseballs, whacking seven shots over the fences.

3.   Next thing you knew, there was Harper looking to get back into the game, flexing his shoulders as if waking up from a nap.

4.   Saturday, still tentatively flexing her shoulder, she was cheered off.