title: Kinematic responses to plyometric exercises conducted on compliant and noncompliant surfaces.
abstract: Jumping is an important performance component of many sporting activities. A number of training modalities have been used to enhance jumping performance including plyometrics. The positive effects of plyometric training on jumping performance are a function of the stretch-shortening cycle phenomenon. However, there has been little research on the effects of the surface on jumping performance. This study examined the effects of performing 2 different plyometric exercises, depth jump (DJ) and counter movement jump (CMJ), on noncompliant (ground) and compliant (mini-trampoline) surfaces. Male participants (N = 20; age = 21.8 +/- 3.8 years; height = 184.6 +/- 7.6 cm; mass = 83.6 +/- 8.2 kg) randomly performed 10 CMJ and 10 DJ on compliant and noncompliant surfaces. Kinematic data were determined via 2-dimensional high-speed video. There were significant (p < 0.05) differences in DJ and CMJ joint and segment range of movement for ankle, knee, hip and trunk, indicating less crouch when the participants performed plyometric exercises on the compliant surface.
authors.affiliation: Institute of Sport and Exercise Science, James Cook University, Townsville, Queensland, Australia. Crowther@jcu.edu.au
authors.forename: Robert G
authors.initials: RG
authors.lastname: Crowther
authors.forename: Warwick L
authors.initials: WL
authors.lastname: Spinks
authors.forename: Anthony S
authors.initials: AS
authors.lastname: Leicht
authors.forename: Christopher D
authors.initials: CD
authors.lastname: Spinks
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena; D015444:Exercise / Q000502:physiology*; D006801:Humans; D008297:Male; D010806:Physical Education and Training / Q000379:methods*; D010809:Physical Fitness; D016059:Range of Motion, Articular; D019876:Sports Equipment; D013499:Surface Properties