title: Muscle Damage Response in Female Collegiate Athletes After Repeated Sprint Activity.
abstract: Exercise-induced muscle damage (EIMD) is a well-investigated area, however there is a paucity of data surrounding the damage response in females. The aim of this study was to examine the damage responses from a sport-specific bout of repeated sprints in female athletes. Eleven well-trained females (mean ± SD; age: 22 ± 3 years; height: 166.6 ± 5.7 cm; mass: 62.7 ± 4.5 kg) in the luteal phase of the menstrual cycle completed a repeated sprint protocol designed to induce EIMD (15 × 30 m sprints). Creatine kinase, countermovement jump height, knee extensor maximal voluntary isometric contraction (MVIC) force, delayed onset muscle soreness (DOMS), 30-m sprint time, and limb girth were recorded before, after, 24, 48, and 72 hours after exercise. Creatine kinase was elevated at 24, 48, and 72 hours (p ≤ 0.05), peaking at 24 hours (+418%) and returning toward baseline at 72 hours. Countermovement jump height was reduced immediately after, 24, and 48 hours (p ≤ 0.05). Sprint performance was also negatively affected immediately after, 24, 48, and 72 hours after exercise. Muscle soreness peaked at 48 hours (p < 0.01) and remained significantly elevated at 72 hours after exercise (p < 0.01). Limb girth and MVIC did not alter over time. This study provides new information on the EIMD response in trained females after a sport-specific bout of repeated sprints. Importantly, this damage response has the potential to negatively affect performance for several days after exercise.
authors: 1Department of Sport, Exercise and Rehabilitation, Northumbria University, Newcastle, United Kingdom; and 2Water Research Group, School of Environmental Sciences and Development, Northwest University, Potchefstroom, South Africa.
authors: Karen M
authors: KM
authors: Keane
authors: Rebecca
authors: R
authors: Salicki
authors: Stuart
authors: S
authors: Goodall
authors: Kevin
authors: K
authors: Thomas
authors: Glyn
authors: G
authors: Howatson
mesh_terms: D000293:Adolescent; D000328:Adult; D054874:Athletic Performance / Q000502:physiology; D015415:Biomarkers / Q000097:blood; D005260:Female; D006801:Humans; D007537:Isometric Contraction / Q000502:physiology; D007719:Knee Joint / Q000502:physiology; D018482:Muscle, Skeletal / Q000502:physiology / Q000503:physiopathology*; D063806:Myalgia / Q000097:blood / Q000209:etiology* / Q000503:physiopathology; D016059:Range of Motion, Articular / Q000502:physiology; D012420:Running / Q000502:physiology*; D055815:Young Adult
chemical_list: D015415:Biomarkers