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The gluteus maximus is the main extensor muscle of the hip in humans. It is the largest and outermost of the three gluteal muscles and makes up a large part of the shape and appearance of each side of the hips. It is the single largest muscle in the human body. [1] Its thick fleshy mass, in a quadrilateral shape, forms the prominence of the ...
These muscles are aided by the gluteus maximus and the inferior portion of the adductor magnus. Hip muscles also play a role in maintaining the standing posture. These muscles work in an integrated system with muscles of the shoulder, neck, core, lower leg, and supporting muscles of the spine, to provide the ability to stand with good posture. [1]
The gluteus maximus arises from the posterior gluteal line of the inner upper ilium, and the rough portion of bone including the crest, immediately above and behind it; from the posterior surface of the lower part of the sacrum and the side of the coccyx; from the aponeurosis of the erector spinae (lumbodorsal fascia), the sacrotuberous ligament, and the fascia covering the gluteus medius.
The inferior gluteal nerve is the main motor neuron that innervates the gluteus maximus muscle. It is responsible for the movement of the gluteus maximus in activities requiring the hip to extend the thigh, such as climbing stairs. Injury to this nerve is rare but often occurs as a complication of posterior approach to the hip during hip ...
The chest fly is performed while lying face up on a bench or standing up, with arms outspread holding weights, by bringing the arms together above the chest. This is a compound exercise for the pectorals. Other muscles worked include deltoids, triceps, and forearms. Equipment: dumbbells, cable machine or "pec deck" machine.
The ability to do a pull-up is not entirely dependent on your level of fitness, so even very fit women may have trouble doing pull-ups. ... men have larger shoulder girdles and larger muscles ...
Kipping pull-ups have lower muscle activation in the upper body but greater activation in the lower body and core; it is possible to perform them faster and complete more repetitions before encountering upper-body fatigue. [14] Kipping pull-ups are considered high risk for injury and are a major cause of shoulder injury in CrossFit athletes. [15]
Chin-ups and pull-ups; Chin-ups and pull-ups are similar exercises but use opposite facing grips. For a chin-up, the palms of the hands are facing the person as they pull up their body using the chin-up bar. The chin-up involves the biceps muscles more than the pull-up but the lats are still the primary mover. [8] For a pull-up, the bar is ...