5 Minute Plank

Increase your plank time to 5 minutes by adding seconds each day for 30 days. Feel free to amp this challenge up by doubling your daily time or altering a basic plank to side plank, one legged plank, etc... Sky is the limit :-) Have fun with the challenge. Let me know when you've completed it, you can do so through the app! Did you add on to the challenge or mix it up in anyway? Share your success!