Mediocre or Failing Form
There is a right and a wrong way to do things when you exercise. It may seem petty to some people that a trainer or coach would continually tell a weightlifter to keep their knees bent while doing arm exercises or for a runner to be jogging on a treadmill and watching their stride in the mirror, but exercise can actually hurt you if you are not careful. If you run and circle your feet out sideways instead of straight forward, you may cause knee injuries. If you lock your joints when lifting weights, you risk damaging those joints or ligaments.
Form is especially important for people who are lifting weights. Even if you are only moving five pound dumbbells, you need to make sure that you have correct form. If your form is wrong, at the very least, you are not getting the full benefit of the exercise. At worst, you are hurting yourself.
If you lift weights, paying attention to form is more important than ever at the end of a set. As your muscles get tired, your form may start to slip. If you cannot hold your form through the entire set, you need to use lighter weights. Even if you lift to failure, you should still be using good form.