We've seen a huge shift in how people like to exercise through the decades, from independent gyms to "all under one roof" health clubs (which brought with them the lurid-Lycra-wearing aerobics class — let's not go back there — and the "feel the burn" mentality). Following this, variations of aerobics classes, strength and conditioning groups, dance, yoga and Pilates were born and that leads us to now, when you can do a combination of just about anything. But people's mind-sets are changing and the fitness industry will need to change to reflect that.