isokinetic - definition. What is isokinetic
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%ما هو (من)٪ 1 - تعريف

PROCESS IN WHICH FORCE IS GENERATED WITHIN MUSCLE TISSUE, RESULTING IN A CHANGE IN MUSCLE GEOMETRY. FORCE GENERATION INVOLVES A CHEMO-MECHANICAL ENERGY CONVERSION STEP THAT IS CARRIED OUT BY THE ACTIN/MYOSIN COMPLEX ACTIVITY, WHICH GENERATES FORCE
Eccentric (sport); Muscular contraction; Concentric exercise; Eccentric (Sport); Concentric contraction; Contractile proteins; Eccentric contraction; Excitation–contraction coupling; Excitation contraction coupling; Contraction of the muscles; E-C coupling; EC coupling; Isokinetic; M-response; Muscle relaxation; Muscle stimuli; Muscle contractions; Excitation-contraction coupling; Eccentric exercises; Muscle physiology; Cross-bridge cycle; Cross-bridge cycling; Crossbridge cycling; Crossbridge cycle
  • Cross-bridge cycle
  • Structure of neuromuscular junction.
  •  Types of muscle contractions
  • Organization of skeletal muscle
  • Swellings called varicosities belonging to an autonomic neuron innervate the smooth muscle cells.
  • Cardiac muscle
  • Key proteins involved in cardiac calcium cycling and excitation-contraction coupling
  • Muscle length versus isometric force
  • Asynchronous muscles power flight in most insect species. a: Wings b: Wing joint c: Dorsoventral muscles power the upstroke d: Dorsolongitudinal muscles (DLM) power the downstroke. The DLMs are oriented out of the page.
  • In vertebrate animals, there are three types of muscle tissues: 1) skeletal, 2) smooth, and 3) cardiac
  • Sliding filament theory: A sarcomere in relaxed (above) and contracted (below) positions

isokinetic         
[???s?(?)k?'n?t?k]
¦ adjective characterized by or producing a constant speed or rate.
Muscle contraction         
Muscle contraction is the activation of tension-generating sites within muscle cells. In physiology, muscle contraction does not necessarily mean muscle shortening because muscle tension can be produced without changes in muscle length, such as when holding something heavy in the same position.
weight training         
  • A woman doing weight training at a [[health club]] with her coach standing behind her.
  • Weight training can be incorporated into numerous fitness regimes.
  • chapter=Knees}}</ref>
  • [[Arthur Saxon]] performing an early plate-loading barbell and [[kettlebell]] (late 19-century)
  • The ''leg extension'' is an isolation exercise.
  • Lifting belt
  • The ''dumbbell squat'' is a compound exercise. An [[exercise ball]] can be used for support and allow for a wider range of exercises to be performed. They are also known as Swiss balls or stability balls.
  • Bicep curl with a dumbbell.
  • The weight stack from a [[cable machine]].
  • Lifting straps
COMMON TYPE OF STRENGTH TRAINING AND BODY BUILDING
Weight Trainers; Weight Training; Isokinetic exercise; Isokinetic exercises; Weight-training; Weight room; Push–pull workout; Weights training; Resistance weight training; Recreational weight training; Musculation; Compound exercise; Isolation exercise; Gymming; Push-Pull Workout; Weightroom; Weightlifting belt; Weight lifting belt; Push-pull workout; Basic lifts; Lifting belt; Head harness (weight training); Compound movements; Free weight (equipment); Health benefits of weight training
Weight training is a kind of physical exercise in which people lift or push heavy weights with their arms and legs in order to strengthen their muscles.
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ويكيبيديا

Muscle contraction

Muscle contraction is the activation of tension-generating sites within muscle cells. In physiology, muscle contraction does not necessarily mean muscle shortening because muscle tension can be produced without changes in muscle length, such as when holding something heavy in the same position. The termination of muscle contraction is followed by muscle relaxation, which is a return of the muscle fibers to their low tension-generating state.

For the contractions to happen, the muscle cells must rely on the interaction of two types of filaments which are the thin and thick filaments. Thin filaments are two strands of actin coiled around each, and thick filaments consist of mostly elongated proteins called myosin. Together, these two filaments form myofibrils which are important organelles in the skeletal muscle system. Muscle contraction can also be described based on two variables: length and tension. A muscle contraction is described as isometric if the muscle tension changes but the muscle length remains the same. In contrast, a muscle contraction is isotonic if muscle tension remains the same throughout the contraction. If the muscle length shortens, the contraction is concentric; if the muscle length lengthens, the contraction is eccentric. In natural movements that underlie locomotor activity, muscle contractions are multifaceted as they are able to produce changes in length and tension in a time-varying manner. Therefore, neither length nor tension is likely to remain the same in skeletal muscles that contract during locomotor activity.

In vertebrates, skeletal muscle contractions are neurogenic as they require synaptic input from motor neurons. A single motor neuron is able to innervate multiple muscle fibers, thereby causing the fibers to contract at the same time. Once innervated, the protein filaments within each skeletal muscle fiber slide past each other to produce a contraction, which is explained by the sliding filament theory. The contraction produced can be described as a twitch, summation, or tetanus, depending on the frequency of action potentials. In skeletal muscles, muscle tension is at its greatest when the muscle is stretched to an intermediate length as described by the length-tension relationship.

Unlike skeletal muscle, the contractions of smooth and cardiac muscles are myogenic (meaning that they are initiated by the smooth or heart muscle cells themselves instead of being stimulated by an outside event such as nerve stimulation), although they can be modulated by stimuli from the autonomic nervous system. The mechanisms of contraction in these muscle tissues are similar to those in skeletal muscle tissues.