Day25 Published March 17, 2013 at 612 × 612 in 28 Day Fitness Challenge: Days 22-28 Day 25: Abs of Steel (10 min) + LB 12 min Kettlebell Full Body Blast x2 (26 min). Yeah, I looked at the time this day and the 12 min FBB is actually 13 min!! So, I realized, that’s 2 extra min I’ve been doing!! LOL ;)!