I've never tried to RoboMass blend, but I respectfully challenge you to find a Robo product with more PIP than the 100/100/100 RoboRip blend....  I had huge knots everywhere for weeks that felt exactly like knives inside them.  Being a newbie to blends, I finished all 4 bottles. Transformation was incredible. 
Back on topic, I've always believed Deca induced collagen synthesis (like anavar) alongside repairing tears of the ligaments and tendons...