Gorilla starts lifting weights in front of a pro lifter and shocks the whole crowd!

Sebastian Oreb | Online Coach & Mentor for Personal Trainers on Instagram: "Lifting weights will improve your bone mineral density. But lifting HEAVY weights is what makes the biggest difference. Heavy means above 80 percent of your max. That is the one to six rep range. It places a high mechanical load on the bone and signals your body to build stronger, denser bones. This is especially important for menopausal women and anyone wanting to age with strength and independence. But here is what mos