How the 30-Day Abs Plank Challenge Works

Day 1: 20 seconds
Day 2: 20 seconds
Day 3: 30 seconds
Day 4: 30 seconds
Day 5: 40 seconds
Day 6: Rest
Day 7: 45 seconds
Day 8: 45 seconds
Day 9: 1 minute
Day 10: 1 minute
Day 11: 1 minute
Day 12: 1 minute 30 seconds
Day 13: Rest
Day 14: 1 minute and 30 seconds
Day 15: 1 minute 30 seconds
Day 16: 2 minutes
Day 17: 2 minutes
Day 18: 2 minutes and 30 seconds

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