Lunge Jumps is an exercise that is effective for the legs. To perform this
1. Stand in a lunge position, right foot forward
2. Make sure to keep your hands behind your head
3. Jumping up and switch foot position in mid-air, landing in a lunge position, with the left foot forward, keeping the hands behind the head.
4. Repeat 10-15 repetitions, or timed
After you have practiced this workout a lot, you can add dumbbells for extra weight, as you can see on the video included below.