Sit on the plate-loaded leg extension machine with your back firmly against the pad and your legs positioned under the padded lever. Grip the side handles for stability and start with your knees bent. Extend your legs by straightening the knees against the resistance until they are nearly fully straight, then slowly lower the weight back to the starting position with controlled movement to isolate and strengthen the quadriceps.
Log your lever leg extension (plate loaded) sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.