10. Plank Jacks
Plank jacks are the best of both worlds, because they combine the strength building of a plank and the cardio of a jumping jack. Start by stepping your feet out and build to jumping both out at the same time.
Begin in plank position, with your shoulders over your wrists, your body in one straight line, feet together. Like the motion of jumping jacks, jump your legs wide apart, and then back together to complete a rep. Keep your hips down and glutes engaged, increasing your pace as you find a rhythm. Do three sets of 20-30 reps.Image Source: POPSUGAR Photography
