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Effects of Miometric and Pliometric Muscle Actions on Delayed Muscle Soreness.

Carpinelli, Ralph N.; Gutin, Bernard
Journal of Strength & Conditioning Research: May 1991
Article: PDF Only

The acute effects of miometric muscle actions (MMA) and pliometric muscle actions (PMA) of the quadriceps were studied in 24 healthy untrained females. Group 80/80 (n=12) performed three sets of MMA-only (shortening muscle actions) knee extensions until fatigue, alternated with three sets of contralateral PMA-only (lengthening muscle actions) exercise with a similar resistance (80 percent 1 RM) for the same number of repetitions. The 80/120 group (n=12) followed the identical MMA protocol, but used 120 percent 1 RM to fatigue for the contralateral PMAs. Subjects returned approximately 48 hours after the initial exercise session to attempt to repeat or surpass their initial performance. Group 80/120 reported significantly higher (p < 0.01) delayed onset muscle soreness (DOMS) following PMAs 24, 48 and 72 hours post exercise. Group 80/80 reported similar DOMS for MMA and PMA limbs. There was no significant difference in the number of repetitions performed between the initial and 48-hour exercise sessions in either group. Contrary to the preponderance of professional opinion, these data suggest that when similar resistances are used, PMAs per se do not induce greater DOMS. However, greater resistive forces, which are often encountered during PMAs, can induce greater DOMS.

(C) 1991 National Strength and Conditioning Association