withse this routine 'full body' of simple exercises for different muscle groups, focused on strengthening and gaining balance. ceps and triceps Miniature trx Miniature 1 . Biceps with supine grip. We take the grabs with a supine grip (with the palms facing towards us), and the body completely straight and in a slightly backward position, we perform a flexion of arms, from that position we return to the initial position. The elbow s should remain at shoulder height.