I’ve been a fan of the Nordic hamstring curl for over 10 years, and both my original and current ATG gyms have hamstring curl machines (which cost $3,000), but the Nordic can be INTENSE, and hamstring curl machines are too bulky and costly for me to use with the 100 high school students I now volunteer coach… Fortunately, the ham roller has been a winner! I’m able to line up 10 of them and coach huge groups of students, with the Nordic as an optional bonus for advanced athletes. So the progression I now use is: Ham Roller: 2 legs Ham Roller: 2 legs up, 1 leg down Ham Roller: 1 leg Nordic eccentric! (“Eccentric” in exercise means just the way down) Product Details: V-Shaped Foot Catch for secure positioning Durable Black Textured Powder Coat Finish  3” ABEC-Bearing Wheel for smooth, stable movement Heavy-Duty Steel Construction Compact & Portable Design Weighs 8.6 lbs Dimensions: Length: 12.5 Inches Width: 25 Inches Height: 3 Inches Weight Capacity: 350 LBS