title: Benefits of short-term muscular training in reducing the effects of muscular over-exertion.
abstract: Muscle soreness, serum creatine kinase (CK), and serum and urinary hydroxyproline levels were examined following muscle over-exertion and resistance training. Seven untrained men performed high intensity leg-extension exercises at a resistance at which they could initially accomplish 90% of their 10 repetitions maximum (10 RM), for 30 minutes to induce muscle over-exertion. In Phase 1 a single bout of muscular over-exertion was followed by a week of rest. Phase 2, the training period, was a repeat of the over-exertion workload of Phase 1 for five consecutive days. Phase 3 was a single bout of over-exertion at a higher 10 RM workload. Normo-responsive and hyper-responsive changes in serum CK were exhibited by different subjects in Phase 1. Muscle soreness was perceived by both groups but to a greater extent in the hyper-responsive group. Serum CK and muscle soreness values were lower during Phase 2 and 3 than in Phase 1. Neither serum nor urinary hydroxyproline levels changed significantly post-exercise. These findings show that a single bout of intense exercise and a brief period of muscular training reduces serum CK and muscle soreness responses following a subsequent single bout of exercise at a higher intensity.
authors.affiliation: Department of Physical Education, York University, Toronto, Ontario, Canada.
authors.forename: R
authors.initials: R
authors.lastname: Seaman
authors.forename: C D
authors.initials: CD
authors.lastname: Ianuzzo
mesh_terms: D000328:Adult; D003402:Creatine Kinase / Q000097:blood; D006801:Humans; D006909:Hydroxyproline / Q000097:blood / Q000652:urine; D008297:Male; D009132:Muscles / Q000502:physiology*; D005082:Physical Exertion; D010809:Physical Fitness; D013997:Time Factors
chemical_list: D003402:Creatine Kinase; D006909:Hydroxyproline