Tone Your Shoulders in Just 15 Minutes
Step 2. Walking Lunges
Start with your feet together and step forward with your right leg (shown, near right).
Go into a lunge, keeping your knee over your ankle (far right). Then, in one motion, straighten up and lunge forward with your left leg. Continue for 10 steps forward. Then turn around and lunge 10 more times back to where you started.