https://themeforest.net/item/gymbase-responsive-gym-fitness-wordpress-theme/2732248

Gym fitness, bodybuilding, personal trainer dedicated, GymBase is the most popular and #1 selling gym WordPress Theme. Suitable for sports related websites such as crossfit, fitness center, martial arts or yoga, GymBase combines not only a vibrant, and professional visual styling but also niche features, such as a built-in workout timetable or BMI calculator.