Trainer certification rule, exam and renewal changes at NASM, ACE, ISSA, NSCA and ACSM, state trainer licensing bills, gym and studio lease, insurance and liability rule changes, franchise fee and royalty changes at the fitness chains, booking and billing platform fee changes at Mindbody, ClassPass, Trainerize and Glofox, ClassPass payout rule changes, music licensing rules for classes, online coaching platform and app store rules, state auto-renewal and gym contract laws that affect studio billing and chain closures and sales, with the body, platform or chain first and the effect on a studio or a solo trainer.