Soccer has many intervals. Players may be sprinting 100% for 4 seconds, walking for 5 seconds, then jogging for 12 seconds. It changes so often that we should be prepared for those changes, and be able to recover quickly for the next time we are at a 100% sprint. In reality, that is the whole point of getting 'soccer fit'. As players, we need to be able to bounce back for another full sprint as quick as we can.