Sentences with phrase «joint angles»

Sex hormones are what signal growth plates to close, so If your puppy was neutered before around 18 months old, he will have some delay in growth plate closure, and he will also have uneven growth in his bones resulting in joint angles that could be more liable to injury.

The quickLIFT units provide enough front lift to level out most IFS trucks while keeping ball joint angles and front suspension geometry within acceptable tolerances.

Comparing the effects of different training variables, Swinton et al. (2011a) found that there was no difference in peak knee joint angles when using relative loads ranging between 10 — 80 % of 1RM with the straight bar and hexagonal bar deadlifts.

The three regions of the latissimus dorsi appear to function similarly as primary shoulder extensors in the scapular plane (although the superior and inferior fibers seem to have greater peak moment arm lengths than the middle fibers) while displaying peak moment arm lengths at very different joint angles.

So if different joint angles are strengthened to a greater extent by common vertical (axial) exercises and by common horizontal (anteroposterior exercises), then this could lead to force - vector specificity.

They noted that differences recorded in joint angles were generally between 2 — 3 degrees, which may have been measurement error.

Comparing the deadlift with the squat in a group of powerlifters, Hales et al. (2009) found that there was a difference in peak hip joint angles between the squat and deadlift.

Comparing the effects of barbell type, Swinton et al. (2011a) found that there was no difference in peak joint angles when comparing straight bar and hexagonal bar deadlifts.

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.

Comparing the deadlift with the squat in a group of powerlifters, Hales et al. (2009) found that there was a difference in peak knee joint angles between the squat and deadlift.

Moreover, Jakobsen et al. (2013) reported that during lunges with both free weights and elastic resistance, EMG amplitude of most of the leg muscles is greatest at the point of peak hip and knee flexion, where ground reaction forces are exerted in order to start the lifting phase but that in the elastic resistance condition, there was a trend towards a more even level of EMG amplitude across joint angles.

Test of transfer (long - term): Strength training that targets the hip extensors close to full extension (such as with the hip thrust), and the knee extensors at around 40 degrees from full extension (such as with the quarter squat), may well transfer better to sprinting than strength training that targets the hip and knee extensors at other joint angles.

Comparing skilled and unskilled adolescent powerlifters, Brown and Abani (1985) found that there was a difference in peak knee joint angles between groups.

Since strength is specific, then: strength training of the hamstrings at long muscle lengths, and the quadriceps and gluteus maximus at short muscle lengths, should lead to superior gains in sprinting performance than strength training at other joint angles.

Sports specificity relates to selecting the correct muscles, joint angles, and postural positions to utilize during strength training.

The number of possible exercises that target specific joint angles is almost as limitless as the body's functional movements that these exercises help improve.

Therefore, you should first determine what you want to get out of resistance training program and then select exercises that stress the muscle and joint angles you want to target.

In contrast to the moment arm findings, this suggests that exercises involving peak contractions at a range of joint angles may be optimal.

They tested joint angles from long (90 degrees of knee flexion) to short (30 degrees of knee flexion) muscle lengths, expecting to see greater gains for the isotonic group at both ends of the range of motion, where loading was higher than in the middle.

Such differences in the hip extension moment between lift variations may be the result of differing trunk inclination or differences in other joint angles, as noted above in respect of the back squat (Hay et al. 1983; Frost et al. 2013).

Therefore, the sticking region during the bench press occurs at different joint angles depending on grip width.

To answer that question, we need to understand how our strength at different joint angles changes after strength training.

Even so, McMahon et al. (2013) did find that full range of motion training produced similar increases in EMG amplitude at all joint angles, while partial range of motion training left EMG amplitude unchanged short muscle lengths, and reduced EMG amplitude at longer other muscle lengths.

The moment arm length for the three heads of the triceps at equal elbow joint angles was not consistent across the 3 subjects.

After all, even if we get stronger overall, if the angle of peak torque changes, then we will find that some joint angles increase hugely in strength, while others do not improve strength very much at all.

Comparing different knee joint angles, Escamilla et al. (2002) explored the conventional and sumo deadlift at knee angles of: 90 — 61 degrees (lift - off position); 60 — 31 degrees (mid-range); and 30 — 0 degrees (lock - out).

Furthermore, both upper and lower erector spinae muscle activity were higher in the descending phase compared to the ascending phase at knee joint angles of 90 — 61 degrees (lift - off and lower third).

The purpose of this section is to detail the muscle moment arms of the pectoralis major muscle in each of the sagittal, frontal, and transverse planes, and to explain how they change with changing joint angles.

And when athletes perform COD maneuvers in an unplanned situation, the knee joint angles are more flexed (Besier et al. 2001a).

As explained above, COD maneuvers most commonly involve force production when the hip extensors and knee extensors are at moderate muscle lengths (although the exact joint angles can vary widely between individuals and tasks).

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.

In contrast, in COD maneuvers, hip and knee joint angles are more flexed.

For example, Peak knee joint angles become more flexed when going faster (Vanrenterghem et al. 2012; Spiteri et al. 2013), probably because the lower position allows athletes to display a more horizontal direction of braking and propulsive forces.

On the other hand, people who use an internal focus [change their joint angles disproportionally](https://www.ncbi.nlm.nih.gov/pubmed/19846388)-- some joints end up moving more than they should, while others are neglected.

Brandon et al. (2013) assessed the reliability of a novel analysis system for Olympic weightlifting, comprising surface electromyography (EMG) equipment (to measure EMG amplitude within a muscle), synchronised with electrogoniometry (to measure joint angles), and a barbell position transducer (to measure the height of the barbell and thereby its displacement and linear velocity).

Exploring the effects of training variables, Kellis et al. (2005) found that joint angles differed between relative loads but did not identify how the individual hip, knee and ankle joints differed; however, McKean et al. (2010) reported that peak hip angle was more acute with load compared to no load, while both List et al. (2013) and Gomes et al. (2015) reported that peak hip angle became less acute with heavier relative loads.

Exploring the effects of training variables, Kellis et al. (2005) found that joint angles differed between relative loads but did not identify how the individual hip, knee and ankle joints differed; however, List et al. (2013) found that increasing load caused peak ankle angle to become more acute, from no load to 25 % of bodyweight, to 50 % of bodyweight.

Comparing different knee joint angles in the deadlift, Escamilla et al. (2002) explored muscle activity of the medial and lateral gastrocnemius at knee joint angles of: 90 — 61 degrees (lift - off position), 60 — 31 degrees (mid-range), and 30 — 0 degrees (lockout).

In contrast, Maganaris et al. (1998) assessed the moment arm length at varying ankle joint angles at both rest and during maximal contractions.

While low bar back squats do target the lower body, the mechanics and joint angles trained during the low bar back squat are significantly different than those needed when doing front squats, cleans, and high bar back squats.

Moreover, the glute muscles usually aid the knee in maintaining correct joint angles.

On completion of the 6 - week program, the movement of the hips and knees in relation to each other improved for both groups of runners, showing increases in joint angles between the shin, foot and thigh.

«Automatically tracking the joint angles enables the system to produce a high - quality map even if the camera is moving very fast or if some of the sensor data is missing or misleading,» Klingensmith said.

These make it relatively simple to measure joint angles and the speed and acceleration of each limb during the throwing motion and thus to calculate the forces at each joint.

«In testing, we found that the computer — using the algorithm — performed better than prosthetists at achieving the proper joint angle,» Huang says.

The team is now trying to nail down the specific role of stum proteins in Drosophila and to determine whether the human version of stum — which has never been characterized — also works in joint angle sensing.

Isometric exercise is a type of strength training in which the muscle length and joint angle do not change during the contraction.

Also, if you're experiencing a sticking point at a particular joint angle during a certain lift, targeted isometrics are a great way to solve that problem in a quick and efficient way.

You can't see it, but when you hold a plank or other isometric pose, muscle fibres are pulled from both ends of the contracting muscle — not just one section — meaning your body recruits more muscle fibres than if you were changing the joint angle.

Strength gains occur mainly around the joint angle of the exercise performed.