Which is the correct sequence of a walking cycle?
1. First leg pulled forward
2. Second leg becomes stiff and firm on ground
3. Swing of the leg and planting it forward
4. Second foot lifts off
1, 2, 3, 4
(1)As hip flexors pull the first leg forward like a pendulum, the second leg is made stiff and it's firmly planted foot becomes the new back foot (2). The first leg’s quadriceps femoris muscles contract and straighten that leg as it swings, while shin muscles at the front of the lower leg lift the foot and toes upward to prevent them from dragging along the ground (3).As one foot lands after swinging, the second, which is temporarily the back foot, is about the undergo liftoff (4). While the hamstrings pull the thigh backward and bend the knee, powerful calf muscles turn this foot downward,