カイ・グリーンさんのインスタグラム写真 - (カイ・グリーンInstagram)「💪🏾BUILD A BULLETPROOF BACK!! Is it more effective to do pull ups or pull downs? Do I train all out…or 80% intensity? Is it 20 reps or 15? Do I rest for 30 or 45 seconds? I hear supersets are where it’s at!!! My friend trains back 2x a week and he’s got wings like a 757!!” Just some of the daily things we hear in the gym, and right now is the time we throw all the thoughts aside and get back to the fundamentals for building a #bulletproof back!! .. 📲Get My Training Directly To Your Phone & Make It Easier Than Ever To Build Real Muscle! All My Newest Workouts At —> Trainwithkai.com」6月24日 12時59分