Strength is a matter of the made-up mind.
Remember to keep your movements slow and controlled so your muscles are doing the work, not your momentum. Each of these three exercises works the calves, quads, hamstrings and butt. Hold a dumbbell in each hand, keep your shoulder blades back and down with your chest up, tighten your abs and start stepping alternately. The angle of your knee should be no less than 90 degrees. If you experience any knee pain stop the exercise.