The bent arms hang test is a strength test for your upper body. The test only requires a horizontal bar to hang from.
Measure Your Upper-body Strength
Upper-body strength can be tested and measured in several ways. One way is the bent arms hang test, for instance. It is about trying to hang in one position for as long as possible. Over time, the muscles in your upper back, arms, and shoulders will tire, and it will become impossible to maintain the position. It is very important that you always do the test under the same conditions and situations. So make sure the bar is the same (diameter, material, etc.) as well as the positioning of your hands.