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Creatine Kinase Response to Various Protocols of Resistance Exercise.

Kleiner, Douglas M.; Worley, Michael E.; Blessing, Daniel L.
Journal of Strength & Conditioning Research: February 1996
Article: PDF Only

Little is known about the muscle enzyme response to resistance exercises with various protocols. This study evaluated serum creatine kinase (CK) activity in response to resistance exercise with different protocols. Twelve subjects performed exercises with accommodating resistance at different speeds, or accommodating, variable, and fixed resistances to failure. Venous blood samples were evaluated for serum CK preexercise, postexercise, and 24 hrs postexercise. Subjects also reported ratings of perceived soreness (RPS) 24 hrs postexercise. Results showed no significant difference in CK response, and conflicting results for RPS depending on the protocol. It is concluded that the exercises used in the current study were not sufficiently stressful or different enough from each other to elicit a significant CK response.

(C) 1996 National Strength and Conditioning Association