Sentences with phrase «knee extensors»

Exploring the effects of training variables, Bryanton et al. (2012) and Cotter et al. (2013) found that peak knee extensor moments increased with increasing depth (albeit with the same absolute loads).

The results were a little unclear because the changes were very small after such a light training program — but the increases in MMSE score were indeed correlated (with p < 0.05) with increases in knee extensor strength.

Thus, the objective of the study was to determine the effect of self - myofascial release (SMR) via foam roller application on knee extensor force and activation and knee joint ROM.

This is because of differences in external moment arm lengths, which can be either knee flexor or knee extensor between different individuals and when using different barbell types.

This study showed that training improved the quality of the patellar cartilage and physical function such as knee extensors strength and cardiorespiratory fitness.

It is the only muscle of the group which crosses the hip joint and is a powerful knee extensor when the hip is extended, but is weak when the hip is flexed.

Sure enough, the more highly supervised athletes gained significantly more strength in bench press and knee extensor exercises.

Isometric knee extensor force was measured using a dynamometer.

This means that the hip extensor and knee extensor muscles are producing force when they are at more moderate (and not short) muscle lengths.

Since strength is specific, then: strength training for the hip extensors and knee extensors with eccentric - only muscle actions or accentuated eccentric loading should lead to superior gains in COD ability compared to conventional strength training.

For example, Masuda et al. (2005) found that ball velocity during maximal kicking efforts by university soccer players was associated with hip adductor but not knee extensor torque production during isokinetic testing.

To determine right knee extensor MVC force production, the subjects were seated on a knee extension table with the knee and hip flexed at 90 °.

However, knee external moment arm length is more positive (so a greater knee extensor moment is needed) in the hexagonal barbell compared to the straight barbell, and in the sumo style compared to the conventional deadlift style.

The rectus femoris remains more active than these single - joint knee extensors, with gradual rise and decline.

They found that knee extensor strength (i.e. quadriceps) was significantly correlated with MMSE scores, but elbow and ankle strength weren't.

The researchers evaluated the mechanisms by which the tissue obtains energy by burning sugars and fats by the intervention of oxygen during exercise, on the knee extensors of one leg in 11 active men.

«Transcranial direct current stimulation improves isometric time to exhaustion of the knee extensors» (A. R. Mauger, L. Agnius, J. Hopker, S. M.Marcora, all University of Kent and B.Pageaux, Universite de Bourgogne) is published in the journal Neuroscience.

In a nutshell, the anatomic traits that are associated with a more upright squatting posture include: greater heel elevation, greater ankle dorsiflexion mobility, shorter femur length, longer torso length, wider stance width, more abduction, a higher bar position on the back, greater quadriceps strength and increased intent to target the knee extensors.

Lead scientist, Dr Yohei Takai, concluded that «body mass based squat training for 8 weeks is a feasible and effective method for improving body composition, the strength capability of the knee extensors, and jump performance in adolescent boys.»

Among the lower body muscles, the plantar flexors display the highest proportion of type I muscle fibers, and the knee extensors display the lowest proportion of type I muscle fibers, as shown in the chart below, which presents the mean of the data from all currently available studies.

Recovery was measured using self - reported muscle soreness, creatine kinase levels, knee extensor strength and vertical jump height.

Across every performance measure, including maximal voluntary isometric contraction, countermovement jump height, 20 m sprint time, knee extensors, 5 -0-5 agility, the Montmorency group showed better performance than the placebo group.

COD ability seems to be determined by the ability to decelerate quickly, which requires eccentric - specific strength of the knee extensors (quadriceps) and hip extensors (adductor magnus, gluteus maximus, and hamstrings), directed horizontally, and contracting at moderate muscle lengths.

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.

Unlike sprinting, this eccentric strength is likely necessary for the hip extensors and knee extensors, as the COD maneuver usually involves combined hip flexion and knee flexion.

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).

(Figure 7: Engaging the hip extensors of the raised leg (gluteus maximus, hamstrings, adductor magnus) and knee extensor (quadriceps).)

This suggests that the ability of the hip flexors and extensors to produce force, and the ability of the knee extensors and flexors to absorb it, during the swing phase is the key to faster running.

The lighter loads will make sure that the knee extensors are primarily responsible for lifting the weight.

In other words, using heavier loads in these exercises makes them better at working the hip extensors (hamstrings, gluteus maximus, and adductor magnus) and less effective for training the knee extensors (quadriceps).

Since strength is specific, then: strength training with eccentric muscle actions or accentuated eccentric loading for the knee flexors (and possibly the knee extensors) should lead to superior gains in sprinting performance compared to strength training with similar absolute load in eccentric and concentric phases.