Sentences with phrase «flexion when»

But where your back begins to go into flexion when you're doing the all - fours test, that's where you'd want your descent to stop if you were performing weighted back squat.

The natural motion of plantar and dorsi flexion when walking can give some pain if you are on your feet for a prolonged period of time in footwear that does not provide adequate support.

You perform plantar flexion when standing on your tippy - toes, pressing (or flooring) the gas pedal of a car, walking, and of course, when performing calf exercises.

Not exact matches

Because they still have poor head control and often experience flexion of the head while in a sitting position, infants younger than 1 month in sitting devices might be at increased risk of upper airway obstruction and oxygen desaturation.128, — , 132 In addition, there is increasing concern about injuries from falls resulting from car seats being placed on elevated surfaces.133, — , 137 An analysis of CPSC data revealed 15 suffocation deaths between 1990 and 1997 resulting from car seats overturning after being placed on a bed, mattress, or couch.136 The CPSC also warns about the suffocation hazard to infants, particularly those who are younger than 4 months, who are carried in infant sling carriers.138 When infant slings are used for carrying, it is important to ensure that the infant's head is up and above the fabric, the face is visible, and that the nose and mouth are clear of obstructions.

A woman whose birth team can't match an appropriate technique to the needs of the baby for flexion, rotation, and / or descent FROM THE LEVEL OF THE PELVIS WHERE THE BABY IS CURRENTLY AT WHEN STUCK.

An abnormal plantar reflex (aka Babinski Sign) occurs when upper motor neuron control over the flexion reflex circuit is interrupted.

TSNs also ensured accurate target localization during movement; when TSNs were injected in rat's thigh and calf muscles, they did not move even during the flexion and extension of the leg.

When combined with the flexion, extension and rotation exercises in the DB Complex and HIIT workout, you have a very comprehensive workout plan.

These muscles control extension and flexion of the vertebral column and can increase optimal posture of the spine when performing sprints.

When your toes are pointing downward and your heels are up, the action is called plantar flexion.

The hamstrings are responsible for knee flexion, hip extension and rotation on the knee joint when flexed.

We have a limited amount of forward flexion and we don't feel the damage when we're doing it.

The doctor may also move the patient's legs to test for pain on flexion of the hip (called the psoas sign), pain on internal rotation of the hip (called obturator sign), or pain on the right side when pressing on the left (calling Rovsing's sign).

Comparing the effect of squats with different stance widths, Escamilla et al. (2001a) reported no differences in hip moment arm lengths between the narrow, medium, and wide stance width squats at any point in the lowering and lifting phases, except at 45 degrees of knee flexion in the lifting phase, when the medium and wide stance width squats displayed greater hip moment arm lengths than narrow stance width squats.

Peak knee flexion angles are less acute when using cues to prevent forward knee movement over the toes or as a result of fatigue.

Sprinters are very powerful in the posterior chain, and have extremely powerful quads when the knee is extended, but far less so in flexion, etc etc..

Wretenberg et al. (1996) found that peak knee extensor moments were greater during both powerlifting squats and during Olympic weightlifting - style squats when performed with greater depth (deep = maximal knee flexion vs. parallel = posterior of the hamstrings parallel to the ground).

When assessing maximal knee angle (flexion), mean power output in the concentric phase a squat exercise, and vastus lateralis EMG amplitude, the test - re-test reliability measured by the coefficient of variation (COV) ranged between 5.3 — 7.8 %, which suggests that these measurements are comparatively consistent but not perfectly replicable.

The first being what you have described about compressing our abdominal and pelvic cavities in flexion vs. opening them up and lifting all connective tissue and organs when extending.

They report that medial and lateral gastrocnemius muscle activity was superior when performing the heel raise with a straight leg, while the soleus displayed a small (4 %) but significant increase in muscle activity when performing the heel raise with 45 degrees of knee flexion.

Correspondingly, the five phases that can be described between these positions are as follows: (1) the first pull happens between the ground and when the bar reaches knee level and is initiated by knee and hip extension; (2) the transition happens when the barbell is between knee level and the power position and involves a shift in the position of the body relative to the barbell, which involves a brief period of knee flexion and is therefore referred to as the double knee bend (Enoka, 1979; 1988); (3) the second pull is the most powerful phase of the lift and occurs while the barbell is between the power position and the lifter is in triple extension; (4) turnover occurs as the lifter quickly drops down under the bar from the triple extension position to the catch position, in a deep front squat; (5) recovery into the standing position occurs as the lifter stands from the catch position to upright.

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).

Both these movements are used when opening a bottle with a corkscrew: first biceps unscrews the cork (supination), then it pulls the cork out (flexion).

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.

If you don't have good control of how and when to create flexion and extension through the hip instead of the low back, it's really easy to end up with a super pumped up blown out low back on a workout like this.

When the upper portion works by itself it can assist with bringing the shoulder straight forwards (shoulder flexion).

Beyond that, when you brace, you engage your rectus abdominus, which has a flexion force, again putting your intervertebral discs at risk as patients relying on this muscle can't and don't hold the natural / protective lordotic curve of the lumbar spine.

When one side of the external obliques contracts, it can create lateral 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).

When sprinting, one the initial early acceleration phase has been completed, the joint angles of the hip and knee during the ground contact phase range from 30 degrees of flexion through to full extension.

When you practice any trunk - flexing movement such as Malasana, be careful not to overdo it, because forced flexion can injure the disks and other soft tissue that hold your spine together.

When you roll down the gravity pulls you OUT of spinal flexion, which you resist with your abdominal contraction, strengthening those muscles.

When we roll up, we reverse the lumbar curve and create lumbar flexion, even if we bend the knees.

so then, whenever you bend forward and create flexion in the spine, you're risking disc injury or only when the hamstrings are tight?

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.

You wrote - «If your hamstrings are tight you are risking disk compression any time you bend forward...» so if the hamstrings are not tight, there still will be flexion in the spine when you bend forward..

When I observe people coming to class with tightness in shoulder flexion, they will often bring their head forward.

Insertion: calcaneus (posterior tuberosity) Main functions: flexion of the sole of the foot (more isolated when the knee is flexed), flexion of the knee and supination of the foot.

When you roll up, gravity pulls you INTO the spinal flexion, which, along with the weight of the head and upper body puts too much stress on the discs.

Thus, we might expect the anterior fibers to be most active in hip flexion, particularly when engaged in a movement involving hip internal rotation.

It appears that the involvement of hip flexion increases external oblique muscle activity during the sit up, when performed with either straight or bent legs.

This moment arm increases with increasing knee flexion, making the hamstrings better knee flexors when the knee is bent than when it is extended.

They found increased rectus abdominis muscle activity when performing trunk flexion exercises with added elastic resistance from a portable device (Perfect Abs).

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.

This study explored how both upper and lower gluteus maximus activation are affected by hip flexion angle when performing hip abduction.

When exploring knee flexion during dynamic back extensions, Park and Yoo (2014) also found that increased knee flexion led to increased gluteus maximus EMG amplitude.

This study tested muscle activation during maximum voluntary contractions of hip extension, in different hip flexion joint angles while the knee was flexed, and found that gluteus maximus EMG amplitude was reduced by a third when the hip was flexed, compared to when it was fully extended.

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).

When you do a sit up the natural curve of your back is flattened and the motion tugs on your lower spine muscles, which leads to spinal flexion and puts you at the risk of injury.

However, when Park and Yoo (2014) investigated these factors, only increasing knee flexion increased gluteus maximus EMG amplitude.