fitness instructor helping male athlete develop good form with barbell curl exercise - 二頭肌 個影片檔及 b 捲影像00:29
male athlete trying to finish barbell curl exercise with help from fitness instructor - 二頭肌 個影片檔及 b 捲影像00:26
bearded male doing barbell curl exercise while getting help from fitness instructor - 二頭肌 個影片檔及 b 捲影像00:07
overweight man working out his whole body by pulling resistance bands with both arms on reformer in pilates studio. - 二頭肌 個影片檔及 b 捲影像00:30
