The Dynasty Fitness DSA031 Leg Extension Prone Leg Curl is a dual-function selectorized machine that trains the quadriceps through seated leg extension and the hamstrings through prone leg curl from the same pivot frame and weight stack. A pivot frame assembly running on two 6005-2Z bearings with two independent pop pins manages the transition between modes, while dual roller sets and two separate handle configurations orient the body correctly for each exercise without requiring any cable or pulley adjustment. Built from Q235A cold-rolled steel with a 200 lb selectorized weight stack and a gas spring back pad for comfortable prone positioning, the DSA031 covers both primary knee joint isolation movements in a single 45.4" × 62.1" footprint. It is built for commercial facilities, private training studios, and home gyms where complete quad and hamstring isolation training is a programme requirement without the floor space cost of two separate dedicated machines.

• Dual-function selectorized machine covering seated leg extension for quadriceps and prone leg curl for hamstrings from the same pivot frame and 200 lb weight stack
• Two independent pop pins and a precision pivot frame assembly on 6005-2Z bearings switch between exercise modes without cable adjustment, attachment changes, or pulley reconfiguration
• Dedicated front handles for leg extension and separate rear handles for prone leg curl orient the body correctly for each movement so grip position actively supports the exercise rather than being neutral
• Gas spring back pad holds the prone position comfortably during hamstring curl sets so the lumbar spine stays supported without the user having to brace against the pad throughout the set