Answer :
Greater strength of contraction can be achieved through motor unit recruitment.
Motor unit activation, twitch summation-tetanus, placing the muscle at its ideal length, absence of exhaustion, and muscular growth can all lead to stronger contraction (strength training).
Strength training that uses both eccentric and concentric contractions appears to boost muscular strength more quickly than training that only uses concentric contraction. However, lengthening contractions are also when more muscle damage is caused by exercise.
Therefore, greater strength of contraction can be achieved through motor unit recruitment.
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