Take the push up test for example. If you have very weak upper body muscles, you’re going to have a difficult time pushing yourself up. Therefore you may only be able to do a couple pushups before everything gives out. Because your strength is so low, we’re not able to get a great measure of endurance. The YMCA bench press test is another example of this. You lift a certain weight to the speed of a metronome. The test is stopped when you can’t lift the bar up or when you can’t keep up with the metronome. This type of test puts lighter clients at a disadvantage. If I am struggling to lift the bar to the start position because it’s too heavy, I’m not going to get a lot of repetitions in. My strength impacts my endurance.