Sentences with word «isokinetic»

Nautilus and Cybex are two types of isokinetic machines, where machine varies amount of resistance being lifted to match force curve developed by the muscle.

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.

The hamstrings and quadriceps strength was measured immediately after measurements of range of motion (ROM) and massage with Cybex - II isokinetic dynamometer equipped with an x-y pen recorder.

The effect of 4 weeks beta - alanine supplementation and isokinetic training on carnosine concentrations in type I and II human skeletal muscle fibres.

When isokinetic external resistance is applied during a joint action, the angular velocity is controlled throughout the whole of the joint ROM.

Kea et al. (2001) measured distance covered in the one - leg sideways hop (with a tape) as well as concentric and eccentric isokinetic hip abduction moments (with a dynamometer).

Costa et al. (2010) found that male and female patients with knee osteoarthritis displayed a lower isokinetic hip extension moment than control subjects of a similar age.

It also explains the insignificant level of popularity of isokinetic devices on the European continent — they were rightly perceived as limiting an athlete's true strength potential.

In particular, injured athletes tend to display reduced biceps femoris EMG amplitude both during eccentric isokinetic testing (Sole et al. 2011; Opar et al. 2013b) and during the Nordic hamstring curl exercise (Bourne et al. 2015) and may also display lower biceps femoris EMG amplitude during running in comparison with other muscles in the trunk and thigh than uninjured athletes (Daly et al. 2015), although there are conflicting findings in this respect (Silder et al. 2011).

Beta - alanine supplementation augments muscle carnosine content and attenuates fatigue during repeated isokinetic contraction bouts in trained sprinters.

For example, Choi et al. (1998) and Masuda et al. (1999) assessed the reduction in isokinetic torque over 50 repetitions in a dynamometer.

The force - velocity relationship is most commonly - measured using isokinetic resistance, which involves a dynamometer.

In isokinetic movements, the dynamometer constantly adjusts the force resisting the joint movement so that the velocity remains constant.

Testing strength when muscles are changing length (such as during isokinetic dynamometry or during a conventional barbell lift) must necessarily involve a reduction in maximal force - generating capacity as a result of both of these relationships.

He has nursed four Premier League players back to fitness using techniques of isokinetic dyna - mometry.

Isokinetic Exercise — Isotonic exercise in which there is ACCOMMODATING RESISTANCE.

Marchant, D.C., Greig, M., & Scott, C. (2009) Attentional focusing instructions influence force production and muscular activity during isokinetic elbow flexions.

Even so, some researchers regard isokinetic dynamometry as being a comparable gold standard (Baltzopoulos et al. 2012).

Similarly, peak moment ratios between muscle groups can be performed by setting the dynamometer to perform concentric isokinetic muscle actions in both directions, rather than concentric in one direction and eccentric in the other.

Wiktorsson - Moller et al. (38) found that massage induced a decrease in quadriceps isometric force and hamstrings isokinetic force, which was contradictory to the results found in the present study.

Conduct fitness assessments including: Wingate test, Biodex Isokinetic strength test, 3 minute step test, Rockport test, and vertical jump

Recent research has found that screening tools such as a «hop test» or isokinetic dynamometer which measure muscle strength to identify neuromuscular deficits, as well as neuromuscular training programs, may reduce ACL injuries.

In contrast, isokinetic training failed to improve torque at short muscle lengths (35 and 45 degrees), and also failed to increase EMG amplitude at long muscle lengths (85 degrees).

Some researchers speculated that the velocity - specificity might be limited to isokinetic external load types, and that the same effect would not be observed with constant loads, such as free weights.

Indeed, some early studies (Thorstensson & Karlsson, 1976; Colliander et al. 1988), suggested that the extent to which force production reduces over a series of isokinetic contractions might be negatively associated with type I fiber proportion.

Symptomatic and functional responses to concentric - eccentric isokinetic versus eccentric - only isotonic exercise.

In addition to cardiovascular training, which builds endurance, strength training is essential in preseason to regaining eccentric force, power, and isokinetic strength.

Comparative study of isokinetic eccentric and concentric quadriceps training.

That is why training with a isokinetic Hydra - Gym machine, which offers no eccentric stimuli, will create no hypertrophy.

It also implies that an isokinetic exercise would have less specificity to an elite bench presser's technique because there is no eccentric component.

The isometric training was performed with maximal speed - intent but without moving, while the isokinetic training was performed with maximal speed - intent, and at a relatively high angular velocity (300 degrees / s).

However, the study used a within - subject design, where one leg was trained using the isometric training program, and the other used the isokinetic training program.

In contrast, variable resistance tries to match the strength curve of the lifter with the applied resistance, which could vary depending on the exercise, but approximately reflects the external load type of the isokinetic dynamometer.

There is good evidence that high velocity isokinetic training leads to greater gains in strength when tested at high isokinetic velocities, and there is weaker evidence that the same effect occurs after constant load training.

There is good evidence that high velocity isokinetic training leads to greater gains in strength when tested at high isokinetic velocities (Moffroid & Whipple, 1970; Caiozzo et al. 1981; Coyle et al. 1981; Jenkins et al. 1984; Garnica, 1986; Thomeé et al. 1987; Petersen et al. 1989; Bell et al. 1989; Ewing Jr et al. 1990), but it does not always happen (Farthing & Chilibeck, 2003).

In one study, Remaud et al. (2010) assessed joint angle - specific changes in maximum voluntary isometric contraction (MVIC) torque and in neural drive after isotonic and isokinetic types of external load, using knee extension training.

Noe et al. (1992) assessed erector spinae muscle activity during an isokinetic machine deadlift, and found that erector spinae muscle activity peaked at 83 % of lift height, which was after the point where peak force output was produced (67 % of lift).

Using eccentric - only knee extension training, Guilhem et al. (2013) assessed the effect of constant load and isokinetic external load types on joint - angle specific changes in torque and EMG amplitude.

In one study comparing the effects of training with a machine knee extension with an isokinetic dynamometer, Matta et al. (2015a) reported that hypertrophy in individual quadriceps muscles differed between the two types of training.

The set angular velocity can be zero, in which case the external resistance is isometric, or non-zero, in which case the external resistance is isokinetic.

Although both types of external load were variable, the machine knee extension would still have involved a larger contraction at longer muscle lengths than the isokinetic device.