A seated leg extension leg curl machine is a piece of gym equipment that allows users to perform both leg extension and leg curl exercises while seated. The machine typically has a padded seat and backrest, along with adjustable leg pads and weight stacks for resistance. To perform a leg extension exercise on the machine, the user sits with their back against the backrest and places their ankles under the leg pads. They then extend their legs to lift the weight against resistance, targeting the quadriceps muscles in the front of the thighs. To perform a leg curl exercise, the user adjusts the machine so that they can curl their legs against resistance by bending their knees and bringing their heels towards their buttocks. This exercise targets the hamstrings muscles in the back of the thighs. Using a seated leg extension leg curl machine can help strengthen and tone the muscles in the legs, improve stability and balance, and prevent injuries. It is important to adjust the machine to the appropriate settings for your height and fitness level, and to use proper form to avoid strain or injury.