Describe how the antagonistic muscle pairs are working at the knee during the process of kicking a ball

As a person prepares to kick a ball, their hamstrings contract which causes their knee to bend/flex. Simultaneously, their quadriceps relax and lengthen. Here, the hamstring is the the agonist and the quadriceps are the antagonist. During the actual kicking phase, the knee needs to extend in order to make contact with the ball. For this to happen, the quadriceps now need to contract while the hamstrings relax and lengthen. Now, the quadriceps are the agonist and the hamstrings are the antagonist.