It is suggested that this works due to the ability of the exercise to increase the peak eccentric force of the hamstrings at shallower angles of knee flexion (the knee is more extended) vs. a leg curl which puts a premium on concentric force when the knee is
in full flexion.
Not exact matches
Positioning that promotes physiological
flexion can go a long way
in helping premature babies to develop the strength and tone they need to do what
full term babies do.
In agreement, Reid et al. (2011) compared eccentric plantar flexion with the knee fully extended and during a flexed position and reported superior gastrocnemius muscle activity during plantar flexion with full knee extension and no difference in soleus muscle activit
In agreement, Reid et al. (2011) compared eccentric plantar
flexion with the knee fully extended and during a flexed position and reported superior gastrocnemius muscle activity during plantar
flexion with
full knee extension and no difference
in soleus muscle activit
in soleus muscle activity.
In most cases, people aren't coming down to a full 90 degrees of knee flexion, which is needed for getting in / out of a chai
In most cases, people aren't coming down to a
full 90 degrees of knee
flexion, which is needed for getting
in / out of a chai
in / out of a chair.
While you should still break parallel, it's not beneficial to reach the ATG depth like
in the high bar squat (where the knees reach
full flexion).
These ligaments are most effective at
full extension (when you are standing straight) and
full flexion (when the calves touch your thighs as
in the ATG position of a high bar squat).
in most yoga we do less
flexion / rounding of the lower back, we do a lot of hip hinging, lot of neutral spine
in most of the poses, some extension when we do belly down back bends or bridge + as a result the lower back is not getting its
full potential rom, as we are suppose to be able to flex the lower lumbar to about 40degrees, thoracic about 45 degrees.
It is a common problem
in yoga poses — people lacking
full flexion.
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.
They reported no difference
in flexion action duration between partial ROM bench press compared with
full ROM bench press despite a much shorter barbell displacement, while extension action duration was much shorter (76 %), though non-significant, during the partial ROM bench press.
Similarly, Fujisawa et al. (2014) found that hip
flexion angle did not affect gluteus medius muscle activity when the knee was
in full extension during isometric hip abduction.
The hamstrings displayed similar moment arm lengths
in 90 degrees of hip
flexion and
full hip extension.
The moment arm length of the adductor magnus increases as hip
flexion increases from
full hip extension to 90 degrees of hip
flexion, being largest
in at least 90 degrees of hip
flexion (partial squat).
Anteroposterior exercises involve greater forces closer to
full hip extension, while axial exercises tend to produce greater forces
in high degrees of hip
flexion (Zweifel, 2017).
Fischer and Houtz (1968) also reported greater gluteus maximus EMG amplitude
in full hip extension compared to greater degrees of hip
flexion, during hip extension.
Gluteus maximus EMG amplitude is higher when muscle fibers are shorter (
in full hip extension compared to
flexion,
in hip abduction compared to neutral,
in hip external rotation compared to neutral, and
in posterior pelvic tilt compared to anterior pelvic tilt).
Németh & Ohlsén (1984) performed a study of 10 cadavers and 20 live subjects, and reported that the hip extension moment arm length of the gluteus maximus moment arm of gluteus maximus decreased substantially from around 8 cm to 3 cm with increasing hip
flexion angle, making the gluteus maximus far more effective as a hip extensor
in full hip extension, than
in full hip
flexion.
The initial goals of physical therapy should be to increase the passive
flexion of the foot and improve flexibility
in the foot and ankle, eventually leading to a
full return to normal function.