As used in the phrase null and void, refers to something that binds no one or is incapable of giving rise to any rights or duties under any circumstances.
The quadriceps is muscle group consisting of four muscles that flex the knee, which is a major movement of the farmerâs walk. These muscles are the rectus femoris, vastus intermedius, vastus lateralis, and vastus intermedius.
In general, walking, whether on a treadmill or a track, works your lower body. This includes the quadriceps and hamstrings in your thighs, the gastrocnemius and soleus in your calves, your hip flexors and your gluteal muscles. Bringing your abdominal muscles into the mix by contracting them helps support your lower back as you walk.