This 3-Minute Squat and Plank Workout May Be Short, but It's Intense

Take your jumping jacks to the floor for this plank variation that not only works your arms, core, and lower body, it'll also get your heart pumping.

• Begin in plank position with your feet together. Keep your upper body stable and engage your abs.
• Begin doing jumping jacks with your legs. Hop them wide, then hop them together. Jump as quickly as you want.
• Do as many reps as you can for 30 seconds.