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For most gym-goers, Nelson says, the best bet is to focus on bringing control to the eccentric portion of a movement, then a forceful, fast concentric to finish a rep. Lowering the weight under ...
Eccentric movement provides a braking mechanism for muscle and tendon groups that are experiencing concentric movement to protect joints from damage as the contraction is released. [1] Eccentric training is particularly good for casual and high-performance athletes or the elderly and patients looking to rehabilitate certain muscles and tendons. [2]
The greater the shock (forces experienced on landing), the stronger the eccentric contraction will be, which in turn produces even greater tension. This tension, which is potential force, is then given back in the return movement when the muscular contractions switch to the concentric or shortening regime. [3]
There are two types of isotonic contractions: (1) concentric and (2) eccentric. In a concentric contraction, the muscle tension rises to meet the resistance, then remains the same as the muscle shortens. In eccentric, the muscle lengthens due to the resistance being greater than the force the muscle is producing. [citation needed]
In concentric contraction, muscle tension is sufficient to overcome the load, and the muscle shortens as it contracts. [8] This occurs when the force generated by the muscle exceeds the load opposing its contraction. During a concentric contraction, a muscle is stimulated to contract according to the sliding filament theory. This occurs ...
A negative repetition (negative rep) is the repetition of a technique in weight lifting in which the lifter performs the eccentric phase of a lift. [1] Instead of pressing the weight up slowly, in proper form, a spotter generally aids in the concentric, or lifting, portion of the repetition while the lifter slowly performs the eccentric phase for 3–6 seconds.
This energy would be released as the tendon shortened. Thus, the recoil of the tendon during the shortening phase of the movement would result in a more efficient movement than one in which no energy had been stored. [2] This research is further supported by Roberts et al. [3]
The great utility of the isoinertial method and at the same time what makes it different from the normal isotonic muscle movement lies in the fact that the action isotonic developed in conventional exercises (strength machines and free weights), the resistance is constant throughout the whole of movement in both the concentric phase in which ...