When I was going thru the fire academy, whole class had to plank for 4 minutes every morning. After them 6 months was the only time I had visible abs
If someone dropped or had poor form they’d add another 30 seconds
If someone dropped or had poor form they’d add another 30 seconds




he's 54
fukk a portable earthquake lifestyle
Didier Deschamps French football coach team can do it for 1 hour straight