A forearm plank is a core body exercise that strengthens all of the muscles of the core, gives you a stronger low back, and teaches your body stabilization. Planks are an ideal exercise for the abdominal muscles exactly because they engage all major core muscle groups including the transverse abdominus, the rectus abdominus, the external oblique muscle, and the glutes. The importance of strengthening each muscle group cannot be underestimated either, for all of these groups serve their own purpose. If you strengthen these muscle groups you will notice:
Transverse abdominis: increased ability to lift heavier weights.
Rectus abdominal: improved sports performance, particularly with jumping. This muscle group is also responsible for giving you the renowned six-pack look.
Oblique muscles: improved capacity for stable side-bending and waist-twisting
Glutes: a supported back and a strong, shapely booty.
During a hamstring curl, your back thigh muscles work to lift your lower leg. This movement engages your hamstrings and glutes, which makes them stronger. When you have strong hamstrings, you’re less prone to injury and pain. Muscles Used: Biceps Femoris, Gastrocnemius, Peroneus Brevis, Peroneus Longus, Rectus Femoris, Semimembranosus, Semitendinosus, Soleus, Tibialis Posterior, Vastus Muscles. .