Hip Flexor Moment Lab Report

*John Guido and Sherry Werner make a point that “The stride leg functions to dynamically stabilize the hip and knee joints in a single leg stance to maintain standing posture for

Six standing trials include 1) single dominant leg stance on a firm surface (SDFS), 2) single non-dominant leg stance on a firm surface (SNDFS), 3) double leg stance on a firm surface (DFS), 4) single dominant leg stance on a wobble board (SDWB), 5) single non-dominant leg stance on a wobble board (SNDWB), and 6) double leg stance on a wobble board (DWB). The order of the standing trials will be randomized. A two minute testing period will be recorded for each standing condition. During testing, participants will be instructed to position barefoot with the hands akimbo for as still as possible for both a firm surface and a wobble board conditions. During all one leg stance trials, participants will be instructed to flex the knee of the contralateral

Snapping hip syndrome, also known as dancer's hip, is a medical condition where you feel a snapping sensation, or hear a snapping sound, in the hip when you are running, walking, or swinging your leg around. For many people, the problem is little more than a nuisance, and the only symptoms are the snapping sensation, and sound itself. However, for athletes or dancers, snapping hip exercises may help alleviate the weakness, or pain that sometimes interfere with their performance.

There were few significant differences in knee extensor and knee flexor muscle activity during walking with robotic assistance. Significant differences in muscle activity across condition only occurred in muscles targeted for intervention (knee extensor, VL), with an increase in muscle activity during the EXO condition, a positive result for an extensor muscle. Although some undesirable increases in MH flexor muscle activity were seen in the linear envelopes, they did not present significant changes the statistical analysis on the group level. Muscle activity did not change significantly across visits with the exoskeleton.

The purpose of this experiment was to identify which flexibility measurement tests correlate with the sit-and-reach and modified sit-and-reach tests. In more recent studies, statistics have shown that both hip flexion test results and shoulder extension test results were directly correlated to modified sit-and-reach test results (Mayorga-Vega, Merino-Marban, and Viciana, 2014). The data gathered for the sample

Hobara et al., saw similar results in the loading rate of TTA’s during running with an increased loading rate seen on the intact limb (hobara et al., 2014). Grabowski and D’andrea compared the loading rate of the intact limb at moderate walking speeds to that of a non-amputee control group and found a statistically significant higher rate amongst the amputee subjects (Grabowski and D’andrea, 2013). This discrepancy in load bearing and loading rate may potentially explain the increased risk of developing osteoarthritis seen in the sound limbs of amputees compared to the amputated side. Mundermann et al., found that those with OA consistently had greater average loading rates than the healthy subjects tested (mundermann et al., 2005). This hypothesis may also explain why transfemoral amputees have an increased risk of developing OA in both the hip and knee joints as the load discrepancy has been shown to be greater in above knee amputees than below knee (back up with

During walking and running, leg muscles produce forces that impact the tibiofemoral joint. These forces can have a negative impact on the development, health and maintenance of the cartilage and meniscus in that joint (and increased load on the knees and the tibiofemoral joint can result in osteoarthritis). The tibiofemoral load is varied depending on the muscle coordination patterns. The laboratory created a musculoskeletal model of subject to analyze the tibiofemoral load, and an optimization framework to calculate the load from muscle coordination. Using the model and optimization framework, the laboratory was able to understand the impact of different muscle coordination on the tibiofemoral load. The laboratory was able to precisely predict tibiofemoral forces when compared to in vivo measurements during the early stance phase, but overshot its prediction during the late stance phase. The over-prediction of the tibiofemoral load was due to the extended activity of the gastrocnemius and the rectus femoris. The laboratory was able to modify the activity of these two muscles to increase resemblance with in vivo measurements. The laboratory was also able to identify distinct changes in muscle activity that could decrease tibiofemoral load. A decrease in activation of the rectus femoris and gastrocnemius and an increase in activation of the soleus, gluteus medium and uniarticular hip flexors can decrease the tibiofemoral forces during late

The Modified Thomas is common test that used to assess hip extensibility and determine the existence of hip flexion contracture. Various athletic activities can be significantly affected by the lacking of hip extension and the tightness in the hip flexor muscles. A deficient in hip extension can lead to altering the gait pattern (overstriding gait ) and raised the impact forces during running and then elevates the risk of tibial stress fracture. In the original Thomas test, the participant lies on his back upon an examination table; the participant flexes and hold one knee at the chest. The other leg should remain relaxed upon the tabletop. The positive test will be documented if a gap between this leg

On average, my hip flexion is excellent, but there are signs of weakness on my right leg as it resulted in a low degree of flexion for both the goniometer and flexometer tests.

An experiment was conducted to investigate the effects of simulated crouch gait on foot kinematics and kinetics in healthy children. It shown to us that excessive knee flexion can increase the motion between the multiple foot segments. The normal stabilizing foot mechanics during stance phase can be interfered by the increased motion between the three foot segments especially when the hind foot is pronated. A simulate knee flexion contracture reduces the deceleration and stability of the second ankle rocker. Nevertheless, the ability of the third ankle rocker to accelerates also affected by the contracture. Besides, the increased in maximal dorsiflexion, eversion and external rotation of the hind foot are the compensations of a knee flexion

The younger students were brought in from local schools and competitive athletes came from different sports leagues and organizations from a variety of sports. If there were any signs of diagnosed musculoskeletal conditions or if they were on any types of medicines, they were excluded from the study. The participants only reported to the lab once during the study. pQCT was used to assess vBMC and Ar.muscle at various sites along the monodominant tibia. The only exception for usage of the dominate tibia was if there had been a fracture anytime during the 10 years leading up to the study. Each participant started in an upright position with feet hip wide apart. Once signaled, the participant began jumping repeatedly (15 jumps). Fm1LH was measured using the Leonardo Mechanograph and each m1LH was separated by 1 min of rest. Any jumps that included heel contact were excluded and that was visually controlled during the

Femoral torsion is considered the most common cause of the development of an in-toed gait in the early walker up to the age of 10 years, a host of conditions influence the overall function of the femoral component. These varieties of factors most likely responsible for an adducted gait were called the ‘anteversion syndrome’. The factors in this syndrome included an anteriorly located acetabulum, a tight hip capsule, a tight ilio -tibial band, or short or tightened anterior hip

It also enhances the knee’s ‘screw home mechanism’. (Liu-Ambrose et al.,2003). During extension, the quadriceps contract to extend the knee which creates passive tension in the ACL to prevent excessive anterior translation on the tibia from occurring (Nuemann., 2010). Therefore, if ruptured, the mechanism would be unable to occur due to too much anterior translation preventing the knee from ‘locking’ (Liu-Ambrose et al., 2003).

Miller et al (2007) showed greater knee flexion and internal hip rotation in runners with ITBS at heel strike. Using a simple biomechanical they showed that both factors increased stress on the ITB.

In conclusion, during forward steps of gait with ADIM, there was increased bilateral IO and TrA thickness and increased hip extension. Increased hip extension during forward step with ADIM may have been caused by the increased stability provided by IO and TrA, causing motion restriction at the spine and pelvis, or there was increased gluteus maximus activation. Also, the ADIM potentially caused bilateral activation of the IO and TrA and decreased contralateral pelvic rotation during forward steps with ADIM.