Treadfit Palos Heights Share: Fitness Treadfit Palos Heights Visit Website 12228 S. Harlem Ave Palos Heights , IL 60463 (708) 699-6395 About Map About Treadfit is a fitness studio that uses treadmills and other equipment to perform interval style workouts. Classes are open to all fitness abilities and are led by certified group fitness instructors. What's Nearby? Distance: 5 10 15 20 25 50 mi.