You can do this little workout (after warming-up) e.g. before your strength training.
Plyometric exercises require both, strength and velocity. They improve your elasticity and power.
We recomment 3 sets of these 3 exercises:
1st Exercise: 6-8 repetitions of each side
2nd Exercise: 10-12 jumps
3rd Exercise: 6-8 repetitions of each side