title: Leg and calf press training modes and their impact on jump performance adaptations.
abstract: To examine the effects of resistance exercise (REX) mode on jump performance, subjects were assigned to one of three groups over a 6-week period with no cross-over. Subjects were assigned to leg and calf press REX on either a standard (n = 10) or ergometer (n = 9) device while a third group (n = 9) served as controls (CTRL). REX subjects worked out twice per week, which consisted of a three-set, 10-repetition paradigm for leg and calf press exercises. Immediately before and after the 6-week period, subjects performed tests that assessed jump (standing vertical jump, four-jump test protocol, depth jump) ability, while a fourth estimated knee extensor fast-twitch percentage (FT%) from fatigue incurred through a 50-repetition isokinetic protocol. Data analyses utilized 3 x 2 (group x time) repeated-measures ANCOVAs. Several dependent variables showed effects by group (standard REX, ergometer REX > CTRL) and time (post > pre). An interaction occurred for explosive leg power factor, a four-jump test variable, with standard REX post-test values as the interaction source. A trend for an interaction occurred for depth jump hang time, as ergometer REX values improved over time. Results suggest that mode-specific adaptations occur with REX training. Thus, athletes are best served with the selection of a REX device that is most specific to the demands of their jump performance task.
authors.affiliation: Exercise and Sport Science Program, University of Tulsa, Tulsa, Oklahoma, USA. john-caruso@utulsa.edu
authors.forename: John F
authors.initials: JF
authors.lastname: Caruso
authors.forename: Michael A
authors.initials: MA
authors.lastname: Coday
authors.forename: Charles A
authors.initials: CA
authors.lastname: Ramsey
authors.forename: Shawn H
authors.initials: SH
authors.lastname: Griswold
authors.forename: David W
authors.initials: DW
authors.lastname: Polanski
authors.forename: Jan L
authors.initials: JL
authors.lastname: Drummond
authors.forename: Ron H
authors.initials: RH
authors.lastname: Walker
mesh_terms: D000222:Adaptation, Physiological; D000328:Adult; D000886:Anthropometry; D015331:Cohort Studies; D004576:Electromyography; D005260:Female; D006801:Humans; D007866:Leg; D008297:Male; D018482:Muscle, Skeletal / Q000502:physiology*; D010806:Physical Education and Training / Q000379:methods*; D010807:Physical Endurance / Q000502:physiology*; D011336:Probability; D012680:Sensitivity and Specificity; D013177:Sports / Q000502:physiology*; D013647:Task Performance and Analysis; D019415:Torque