If you think planks are easy, you’ve probably never done them before.  Have fun with this one!

This workout will have a 1:1 work/rest ratio.

PERFORM PER ROUND:

• 20 sec – Plank
• 20 sec – Elbow Plank
• 10 sec – Plank
• 10 sec – Elbow Plank

Rest 1 minute between rounds.

NUMBER OF ROUNDS:

• Beginner – 5
• Intermediate – 10
• Advanced – 15

Remember this is high intensity interval training (HIIT), you need to go all out!