Hip extension moments are the products of the gluteus maximus, hamstrings and adductor
magnus muscle forces and their associated moment arm lengths.
Németh and Ohlsén (1985) reported that the adductor
magnus muscle moment arm length for hip extension was just 1.5 — 2.4 cm in the anatomical position, compared to 6.1 — 6.8 cm for the hamstrings, and 7.5 — 8.1 cm for the gluteus maximus, while Dostal et al. (1986) reported muscle moment arm lengths of 3.9 cm and 5.8 cm for the middle and posterior portions, respectively.
The gluteus maximus contributes to hip extension, along with the hamstrings and adductor
magnus muscles.
Not exact matches
The adductor
muscles include the adductor
magnus, minimus, brevis and longus, which are located around your inner thigh region and are responsible for bringing your legs together, so they contract whenever you need to draw your leg toward your body's midline.
This movement will actually strengthen your whole posterior chain by making the gluteus
muscles, hamstrings and adductor
magnus work together synergistically to extend the hips, while the lower back extensors take the role of stabilisers.
The Inner Thigh also referred to as the adductor group consists of 5
muscles — pectineus, adductor brevis, adductor longus, adductor
magnus, and gracilis.
Intervention — any acute study assessing the
muscle activity of the adductors (adductor group, adductor
magnus, or adductor longus) during the squat exercise
However, increases in
muscle fascicle length are also likely dependent on the mechanical load incurred by the prime mover, as knee flexion (hamstring only) exercise seems to lead to greater adaptations in the hamstrings than hip extension (hamstring, gluteus maximus, and adductor
magnus) exercise, even when
muscle length at peak contraction is shorter (Bourne et al. 2016).
Given the equal roles of the hip and knee extensors in this exercise, it is difficult to identify whether the effects of squat training achieves improvements in COD ability through increases in quadriceps or hip extensor (adductor
magnus, gluteus maximus, and hamstrings)
muscle size.
Although traditionally only deadlift and lunges are used for training the hip extensors (medial and lateral hamstrings, gluteus maximus, and adductor
magnus), there is evidence that some exercises emphasize each of these
muscle groups to a different extent, and also that some exercises target different regions within each of the
muscles more than others.
Dostal et al. (1986) reported that the adductor
magnus displayed
muscle moment arm lengths of -0.3 cm (i.e. external rotation) and 0.4 cm (i.e. internal rotation) for the middle and posterior portions, respectively.
However, the adductor
magnus displayed a much greater moment arm length in 90 degrees of hip flexion than in full hip extension, which may indicate that this
muscle has an important contributory role to hip extension moment in this position.
Garrett et al. (1984) explored the
muscle fiber type of the adductor
magnus.
Although there is some variation between these smaller adductors, the major difference is between the adductor
magnus and the other
muscles, with the adductor
magnus being much larger than the others.
This important study provides some insight into how the different regions of three of the hip extensor
muscle groups (medial and lateral hamstrings, and adductor
magnus) are worked by the leg curl and the lunge.
The adductor
magnus also helps you keep your thigh rolled in, with the help of other inner thigh
muscles and one outer hip
muscle (the gluteus medius).
The adductor
magnus is a very large
muscle, with cadaver studies indicating that its cross-sectional area in elderly people spans from 11.65 — 26.9 cm ² (Pohtilla et al. 1969; Ito et al. 2003).
The
muscle moment arms in adduction for the adductor
magnus exceed those of hip extension, showing that this
muscle is still definitively a hip adductor as well as a hip extensor.
The adductor
magnus has a large hip extensor
muscle moment arm, making it an unappreciated hip extensor, while the other adductors are hip flexors.
Although there is some variation between these smaller adductors, the major difference is between the adductor
magnus and the other
muscles, with the adductor
magnus being much heavier.
The hamstrings and, to some extent, the adductor
magnus (a large
muscle of the inner thigh) are hip extensors that can help the gluteus maximus.
Several of the inner thigh
muscles people want to tone for appearance's sake, the gracillus, and the adductor
magnus, for example, are called adductors.
The adductor
magnus, adductor longus, adductor brevis, gracilis all have substantial hip adduction
muscle moment arms.
Very few studies have reported on the
muscle fiber type of the adductors, although the adductor
magnus has been explored more often than most of the more minor
muscles.
Hip extension moments are created by the
muscle forces of the gluteus maximus, hamstrings and adductor
magnus, multiplied by their moment arm lengths.
The adductor
magnus is very much larger than most of the other
muscles, at around 20 — 27 cm ² (Friederich & Brand, 1990; Horsmann et al. 2007; Ward et al. 2009).
Although very few studies have explored
muscles using functional MRI, one study has investigated the differences between the leg curl and lunge within the adductor
magnus, and between regions within the adductor
magnus (Mendiguchia et al. 2013).
The short head of the
muscle starts between the adductor
magnus and the vastus lateralis and extends up as high as the insertion of the glute
muscles.
Dumbbell Reverse Lunges primarily work
muscles of the quadriceps (in the front of your thigh), gluteus maximus in your buttocks, adductor
magnus in your inner thigh and the soleus in your calf.
Sprint running ability seems to be mainly determined by the ability of the hamstrings to absorb energy at long
muscle lengths, and of the hip extensors (gluteus maximus, adductor
magnus, and hamstrings) and hip flexors to perform concentric work at high velocities while operating at short
muscle lengths, all in a horizontal direction.
However, some large
muscles in the lower limb have both long NFL and large PCSA (gluteus maximus, adductor
magnus) and may therefore have dual roles.
However, some large
muscles in the lower limb have both long NFL and large PCSA and PA (gluteus maximus, adductor
magnus) and may therefore have dual roles.
However, some large
muscles in the lower limb have both high PA, large PCSA and long PA (gluteus maximus, adductor
magnus) and may therefore have dual roles.
Ito et al. 2003 found that the gluteus maximus was more than twice as heavy as the gluteus medius and 27 % heavier than the second heaviest
muscle, the adductor
magnus.