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1. Get into a mountain climber position with your arms extended, hands under the shoulders, and your feet together. Engage your abs to protect your lower back from injury. Jump off feet wide to each side as you are doing a horizontal jumping jacks. 2. Lie on your back with your hands behind your head an legs extended. Start lifting your legs as high as it is comfortable for you, switching them each time.
 
            Calves, Legs, Core
Level: Intermediate
 
            Gluteus, Arms, Legs, Core, Lower Back
Level: Intermediate
 
            Gluteus, Calves, Abs, Core, Quads, Hamstrings, Obliques
Level: Intermediate
 
            Arms, Legs, Abs
Level: Intermediate
 
            Arms, Legs, Abs, Core, Quads
Level: Intermediate
 
            Gluteus, Calves, Arms, Legs, Abs
Level: Intermediate
 
            Gluteus, Shoulders, Abs, Quads, Upper Back, Hamstrings, Inner Thighs, Biceps
Level: Intermediate
 
            Calves, Arms, Legs, Abs, Core
Level: Intermediate
 
            Gluteus, Back, Legs, Abs, Core, Quads, Triceps, Biceps
Level: Beginner