Calisthenics Muscle

I put my own training and nutrition system for building lean muscle using calisthenics only in the form of this book. That's me on the book cover demonstrating results I obtained from this training. -Short daily workouts, the longest training session took 25 minutes.  - It's a bodyweight training = no need in wasting time for commuting to the gym, I mostly train in the yard near my appartment buil...