I cant recommend Koh Fit enough.
Spent 2 weeks here just before Christmas 2021 and had an amazing time. The set up was amazing, with all the classes, nutrition and activities specifically designed to whatever your goals are, be it muy Thai training, weight loss, or whatever you decide. All the staff are super helpful and arrange everything from personalised diets to accommodation and transport, even sorting you a moped out! Koh Samui is also incredibly beautiful and the perfect setting for getting away and reaching your fitness goals. Can’t recommend koh fit enough!! Will definitely be back!