Towel Chinups & Calluses
The towel chinup is an effective exercise for strengthening the muscles of your back, biceps and forearms. It helps to build a strong grip, and is an excellent progression if you find regular chinups too easy. You can also use towel chinups as an alternative to normal chinups if you find that doing them on a bar gives you calluses. However, if you have particularly soft skin, you may still find you get calluses from towel chinups.