title: Repeated bout effect was more expressed in young adult males than in elderly males and boys.
abstract: This study investigated possible differences using the same stretch-shortening exercise (SSE) protocol on generally accepted monitoring markers (dependent variables: changes in creatine kinase, muscle soreness, and voluntary and electrically evoked torque) in males across three lifespan stages (childhood versus adulthood versus old age). The protocol consisted of 100 intermittent (30 s interval between jumps) drop jumps to determine the repeated bout effect (RBE) (first and second bouts performed at a 2-week interval). The results showed that indirect symptoms of exercise-induced muscle damage after SSE were more expressed in adult males than in boys and elderly males, suggesting that the muscles of boys and elderly males are more resistant to exercise-induced damage than those of adult males. RBE was more pronounced in adult males than in boys and elderly males, suggesting that the muscles of boys and elderly males are less adaptive to exercise-induced muscle damage than those of adult males.
authors.affiliation: Department of Applied Biology and Physiotherapy, Research Centre for Fundamental and Clinical Movement Sciences, Lithuanian Sports University, Sporto 6, 4422 Kaunas, Lithuania.
authors.forename: Giedrius
authors.initials: G
authors.lastname: Gorianovas
authors.forename: Albertas
authors.initials: A
authors.lastname: Skurvydas
authors.forename: Vytautas
authors.initials: V
authors.lastname: Streckis
authors.forename: Marius
authors.initials: M
authors.lastname: Brazaitis
authors.forename: Sigitas
authors.initials: S
authors.lastname: Kamandulis
authors.forename: Malachy P
authors.initials: MP
authors.lastname: McHugh
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging / Q000502:physiology*; D002648:Child; D015444:Exercise / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D018763:Muscle Fatigue / Q000502:physiology*; D018482:Muscle, Skeletal / Q000502:physiology*