It's Friday... which means its time for a challenge... one week we flipped tires with Seth Petruzelli's Extreme Conditioning class, sometimes we repurpose a fit trail, get out the TRXs, the Battling Rope, or do ninja-inspired found-gym workouts all over the neighborhood. Today, it was time to test out the old school brutal drill... the US Department of Energy's Manmaker as … [Read more...] about The DOE Manmaker Kettlebell Workout Revisited…