athletic man streching with personal trainer

above action active adult aerial alternative assist athletic biceps bizarre body bodybuilder bold build cardiovascular caucasian coach competitor composition contestant cooperation down endurance exercise exercising fitness flexibility freak guy gym harmony healthy help helping human instructor leg lifestyle male man men metabolism motion moving muscular overhead personal perspective power practice practicing professional program real relaxation resistance running serious shoe side skill spine sport sporting sports strength stress stretch stretches stretching studio top trainer training triceps two view white workout young