Many different types of muscle contractions exist. In which type of contraction is muscle tension is generated, but the length of the muscle does not change?: (A) Concentric, (B) Eccentric, (C) Isokinetic, (D) Isometric
Answer is D. In isometric contractions, muscle tension is generated but the length of the muscle does not change. Concentric contractions are a type of isotonic contraction in which the muscle shoens during the contraction. Eccentric contractions are also a type of isotonic contraction in which the muscle lengthens during the contraction. In isokinetic contractions, muscle tension is generated as the muscle contracts at a constant velocity over a full range of motion. Ref: Medical Physiology: Principles for Clinical Medicine Page 249.