Complex sentence: By varying the repetitions and speed of execution, the exercises can either be explosive (high intensity), allow the athlete to develop muscular endurance, or fall somewhere in between, all predicated on what the football player is trying to improve.
Split into simpler sentences: By varying the repetitions and speed of execution, the exercises can either be explosive (high intensity), allow the athlete to develop muscular endurance, or fall anywhere in between. This is all predicated on what the football player is trying to improve.