Instructions: Repeat each exercise for 20 seconds one after the other with no rest in between. What it works: Deltoids, pecs, biceps, neck muscles, lower back, core, exterior and interior obliques, trapezius, infraspinatus (higher back muscles), hamstrings. Make it better: Breathe out every time you perform toe touches, forward bends and mid-back turns, bringing your lower abs into play. Make it harder: When performing toe touches place your fingers under the balls of your feet and hold th
