Curl Fitness & Nutrition | Personal Training and Nutrition in Rhondda. Choose One to One, Couples/Buddies Training, or Online Coaching. At Curl Fitness, we believe in not just changing bodies, but transforming lives. Our dedicated personal trainers and health experts are your partners on a journey to optimal health and wellbeing. From custom fitness plans to nutrition guidance and online coaching, we are committed to your growth and want to arm you with all the tools you need to become the best version of yourself.