In vertical jumping, there are only selected keys that can help bring improvement. There are two vital things that you definitely have to bear in mind prior to working out and making attempts on leg strengthening. One of these is to perform stretches before and after workouts. Not giving any importance to this aspect will surely remove you of the potential advantages of doing workouts. The other one is to have at least two to three days of rest for every week of training. This will maximize the effect of your training having a consistent exercise program of four to five days a week for the whole duration. This can be advantageous for your calves (back of the lower legs), hamstrings (back of the thigh), and quads (front of the thing). Strengthening these muscle groups will absolutely increase vertical jump.