Main Line Health and Fitness, located in Bryn Mawr, is one of the finest Strength Training and Cardio-Fitness Training facilities in the US. X-Force is the most meaningful advance in strength training in the last 30 years. A patented "tilting" weight stack allows for a 40% heavier resistance on the "negative" (lowering) part of the exercise. Great strength gains in less time! Results that previously required several workouts a week can now be stimulated in ONE workout a week or even less! For EVERYONE!