Alternating Forward Lunge Stand tall with your feet hip's width distance apart. Bend the elbows at your sides or rest your hands on the hips. Step forward with the right foot, lowering your hips until both knees are bent at about a 90-degree angle. Keep the front knee directly above the ankle, and lower the left knee to just above the floor. Keep the weight in your heels as you push back to the starting position, completing one rep. Repeat stepping with the left foot this time, completing a second rep. Keep alternating for 40 seconds. Then rest for 20 seconds. Image Source: POPSUGAR Studios