Collectively, San Diego gyms are a driving force behind the city’s status as one of the fittest places in America. Once they’ve brushed up on their gym etiquette, exercisers are faced with the nearly impossible task of choosing which fitness facility they like best. Many flock to popular spots like the La Jolla Sports Club, while others choose smaller, more-intimate gyms, such as Aire Urban Fitness, where small group classes breed camaraderie. For specific disciplines, such as martial arts and Muay Thai, San Diego has plenty to offer, too. The Art of Eight Training and Fitness Center, for instance, boasts a staff of world-champion instructors, making it one of the best gyms in San Diego.