Advantages of Isokinetic Muscle Contraction – Health Fitness, Diets, Weight Loss

Advantages of Isokinetic Muscle Contraction

An isokinetic muscle contraction is one by which a muscle shortens because it contracts however, not like an isotonic contraction, does so at a constant fee of pace. It’s the fee of pace, actually, that separates it from different varieties of muscle contraction and requires a specialised piece of kit, referred to as an isokinetic dynamometer, to supply.

Exterior of a gymnasium or bodily rehabilitation setting, isokinetic contractions are uncommon. The closest instance could also be swimming the breaststroke by which water supplies fixed resistance to the motion of your arms.


Regardless of being unusual, isokinetic contractions are believed to construct muscle mass, endurance, and energy quicker than some other sort of contraction. They’re additionally utilized by bodily therapists to deal with sure accidents, each bodily and neurological.

In keeping with a examine revealed within the Journal of Bodily Remedy Science, isokinetic coaching can be utilized to deal with knee arthritis, plantar flexor accidents, and motion problems related to stroke and hemiplegia, amongst different issues.

When used for train, isokinetic actions enable muscle groups to exert most pressure inside the vary of joint actions at a continuing pace. The advantages of isokinetic actions range by the pace (velocity) by which they’re carried out. Low-velocity workout routines usually enhance muscle energy, whereas high-velocity workout routines are primarily used for the restoration of muscle endurance following an damage.

Isokinetic Dynamometer

Whether or not for energy coaching or rehabilitation, isokinetic contractions require a specialised piece of kit, referred to as an isokinetic dynamometer, the controls the resistance positioned on a muscle in addition to the rate of the motion.

Most dynamometers are designed for the knees or elbows, however there are some that can be utilized for wrists, ankles, hip flexors, and different muscle teams. The machines look much like these discovered on the gymnasium however are mechanically managed and in a position to measure muscle efficiency on a digital monitor.

Isokinetic dynamometers use hydraulic or motor-controlled devices pre-set to a selected velocity. To make use of the dynamometer, your arm or leg could be strapped onto a levered arm with the joint (such because the elbow or knee) positioned squarely on the axis. You’d then be requested to push as arduous as you possibly can in opposition to the arm. The dynamometer, in flip, would resist the motion in order that the rate stays fixed.

Measuring Efficiency

The isokinetic dynamometer not solely trains a muscle successfully, however it can be used to trace your progress over time.

The rotational pressure positioned on the levered arm, referred to as torque, is a dependable measurement of muscle efficiency (i.e., the “energy” of your muscle). By progressively growing the resistance over time whereas maintaining the rate the identical, you wouldn’t solely enhance your muscle energy however have the ability to classify these features with a numeric worth. That is particularly necessary for skilled athletes.

For instance, if you’ll be able to transfer the levered arm one foot (0.3 meters) with 100 kilos (27.7 kilograms) of pressure, the torque could be 100 kilos per foot (or 8.31 kilograms per meter). With this baseline worth in hand, you possibly can measure adjustments in efficiency and decide how efficient or ineffective a coaching program is.

Nearly any piece of gymnasium gear, from stationary bikes to pull-down machines, may be personalized for isokinetic coaching. Most machines are discovered both in rehabilitation facilities and specialised sport coaching amenities. Skilled sports activities franchises additionally usually buy them for his or her gamers.

Different Forms of Contraction

Isokinetic contractions are solely certainly one of 4 varieties of contraction that transfer skeletal muscle groups, enabling mobility and bodily motion. The opposite varieties of contractions embrace:

  • Concentric contractions trigger muscle groups to shorten, thereby producing pressure. They happen throughout the lifting part of an train, together with the upward motion of a push-up, the lifting of a barbell, or the pulling movement of a seated cable row.
  • Eccentric contractions are the counterpart to concentric contractions. Fairly than compelling a pressure, they oppose a pressure as a muscle lengthens. Examples together with reducing your self throughout a sit-up, pull-up, or a triceps dip.
  • Isometric contractions are these that don’t trigger any motion of a joint. Examples embrace urgent your arms in opposition to a stationary wall, holding your self in a plank place, or doing a wall-sit to construct your quads.
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