Combine Strength and Power

To build lean and strong legs, you need a mix of strength and power, which will also help you to burn more calories faster, says Marta Montenegro, an exercise physiologist in Miami, Florida. Perform a lunge around the clock (starting at 6 and ending at 10, which is a side lunge), and do 3 sets of 12 15 reps and right after that, do split jumps (no weight, switching the leg position every time you land for 15 counts) to fully engage all the muscle fibers.