Alternating pushups exercise is a perfect way to challenge your body a little further. It is a superb variation in classic pushups to make them more interesting and strengthening. Pushups work on your whole body specifically shoulders, triceps, chest and back. Keep your back and spine neutral is the key to perform the move properly. Alternating pushups are also a great challenging exercise for core abdominal muscles. It works on lower body, quadriceps, gluteus and calves.