title: Effect of exhaustive incremental treadmill effort on force generation repeatability in biathletes.
abstract: The authors examined how force generation repeatability changes as the result of incremental maximal test to volitional exhaustion by well-trained (VO2/kg [mL · kg(-1) · min(-1)] 62.55 ± 5.27) individuals. 13 young biathletes (18.9 ± 1.7 years) performed isometric maximum voluntary contraction (IMVC) and submaximal targeted (98N) pushes against the force transducers by arms: elbow extension (EE), elbow flexion (EF) and legs: knee extensions (KE) in pre- and posttest conditions after incremental exhaustive test performed on treadmill. IMVC did not differ significantly between pre and posttest conditions for upper and statistically decrease in lower extremities measurements (p <.01). The mean force of 10 submaximal targeted force productions (F(mean); N) is similar for pre- and posttest measurements. Standard deviation of F(mean) (Fsd; N) and coefficient variation (CV;%) decrease statistically in elbows flexion p <.02 but not extension. The reduction of force repetition accuracy in left knee extension was noticed (p <.01). The fatigue induced by incremental running test decreases a magnitude of force production variability in specifically trained muscle groups in biathletes.
authors.affiliation: a University School of Physical Education , Department of Physiology and Biochemistry , Wrocław , Poland.
authors.forename: Agnieszka D
authors.initials: AD
authors.lastname: Jastrzębska
authors.forename: Ryszard
authors.initials: R
authors.lastname: Błacha
mesh_terms: D000293:Adolescent; D000328:Adult; D056352:Athletes; D054874:Athletic Performance / Q000502:physiology*; D004550:Elbow; D005080:Exercise Test; D006801:Humans; D007717:Knee; D008297:Male; D009142:Musculoskeletal Physiological Phenomena; D012420:Running / Q000502:physiology; D055815:Young Adult
keywords: biathletes; fatigue; force repeatability; incremental exercise; isometric force