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This CrossFit Workout Is One of the Most Intense 40-Minute Workouts You'll Ever Do
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Box Jumps

  • Stand with your feet slightly wider than hips-width distance apart in front of a sturdy box that's six to 24 (or more!) inches tall.
  • Bend your knees and swing your arms back.
  • Jump onto the top of the box with both feet, swinging your arms forward to give you a little momentum.
  • Step one foot at a time back to the floor, or jump down softly with both feet.
  • This counts as one rep.
  • Do as many box jumps as you can for 40 seconds, followed by a 20-second rest.
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