QuartzPlanet Fitness's IPO shows the incredible rise of budget fitnessQuartzFor every extreme fitness trend that comes along, an equal and opposite trend is bound to follow. Such is the case with American gyms. Fitness junkies willing to pay for intense workouts and spa-like experiences have flocked to high-end chains like ...3 Reasons to Be Pumped Up About the Planet Fitness IPOTheStreet.comPlanet Fitness flexes IPO muscleYahoo FinancePlanet Fitness Files to Go PublicNew York TimesFox Business -The Union Leadertất cả 28 bài viết »