Bill DeSimone is an ACE-Certified Health Coach, personal trainer since 1983, and author of several books on safe weight training. In 2006 he opened the Optimal Exercise studio to provide joint-friendly personal training, assisted stretching, and host an exercise science internship. Find him on YouTube (https://www.youtube.com/@joint-FriendlyFitness), Amazon (https://www.amazon.com/author/billdesimone) and LinkedIn.