title: Effect of 6-weeks WBVT on the behaviour of the lower limb muscle fibres during vertical jumping.
abstract: The purpose of the current study was to examine the effect of 6 weeks of whole body vibration training (WBVT) on body composition, muscle activity of the gastrocnemius and vastus lateralis, gastrocnemius muscle architecture (static and dynamic) and ground reaction forces (performance jump) during the take-off phase of a countermovement jump in young healthy adult males. A total of 33 men (23.31 ± 5.62 years) were randomly assigned to a whole body vibration group (experimental group, EGWBVT: n = 17; 22.11 ± 4.97 years) or a control group (CG: n = 16; 24.5 ± 6.27 years). The total duration of the intervention phase (WBVT) was 6 weeks with a frequency of 3 sessions per week. Statistically significant differences were observed (P ≤ 0.05) between pre- and post-test in the power peak (Δ 1.91 W · kg-1; P = 0.001), take-off velocity (0.1 cm · s-1; P = 0.002) and jump height (Δ 0.4 cm; P = 0.002) for EGWBVT. There were no statistically significant differences in any of the body composition and muscle architecture variables. Moreover, no significant differences were found between EGWBVTand CG nor changes in muscle activity during take-off phase of the gastrocnemius and vastus lateralis pre- versus post-training. This study suggests that a 6-week WBVT programme with increasing intensity improves jump performance but does not alter muscle activity nor muscle architecture in healthy young men.
authors.affiliation: a Department of Physical Activity and Sports Sciences, Faculty of Sports, UCAM , Catholic University San Antonio , Murcia , Spain.|b UCAM Research Center for High Performance Sport , Catholic University San Antonio , Murcia , Spain.
authors.forename: Jacobo Ángel
authors.initials: JÁ
authors.lastname: Rubio-Arias
authors.affiliation: a Department of Physical Activity and Sports Sciences, Faculty of Sports, UCAM , Catholic University San Antonio , Murcia , Spain.|b UCAM Research Center for High Performance Sport , Catholic University San Antonio , Murcia , Spain.
authors.forename: Domingo Jesús
authors.initials: DJ
authors.lastname: Ramos-Campo
authors.affiliation: c Performance and Sport Rehabilitation Laboratory, Department of Sports Sciences and Physical Activity, Faculty of Physical Activity and Sports Sciences , University of Castilla-La Mancha , Toledo , Spain.
authors.forename: Paula
authors.initials: P
authors.lastname: Esteban
authors.affiliation: c Performance and Sport Rehabilitation Laboratory, Department of Sports Sciences and Physical Activity, Faculty of Physical Activity and Sports Sciences , University of Castilla-La Mancha , Toledo , Spain.
authors.forename: Fernando
authors.initials: F
authors.lastname: Martínez
authors.affiliation: c Performance and Sport Rehabilitation Laboratory, Department of Sports Sciences and Physical Activity, Faculty of Physical Activity and Sports Sciences , University of Castilla-La Mancha , Toledo , Spain.
authors.forename: José Fernando
authors.initials: JF
authors.lastname: Jiménez
mesh_terms: D000328:Adult; D001823:Body Composition; D004576:Electromyography; D006801:Humans; D035002:Lower Extremity / Q000502:physiology*; D008297:Male; D018485:Muscle Fibers, Skeletal / Q000502:physiology*; D018482:Muscle, Skeletal / Q000033:anatomy & histology / Q000000981:diagnostic imaging / Q000502:physiology*; D064797:Physical Conditioning, Human / Q000379:methods*; D059385:Plyometric Exercise; D052097:Quadriceps Muscle / Q000033:anatomy & histology / Q000000981:diagnostic imaging / Q000502:physiology*; D014463:Ultrasonography; D014732:Vibration; D055815:Young Adult
keywords: Ultrasound; electromyography; ground reaction forces; muscle architecture