title: Effects of Two Football Stud Types on Knee and Ankle Kinetics of Single-Leg Land-Cut and 180° Cut Movements on Infilled Synthetic Turf.
abstract: Higher ACL injury rates have been recorded in cleats with higher torsional resistance in American football, which warrants better understanding of shoe/stud-dependent joint kinetics. The purpose of this study was to determine differences in knee and ankle kinetics during single-leg land cuts and 180° cuts on synthetic infilled turf while wearing 3 types of shoes. Fourteen recreational football players performed single-leg land cuts and 180° cuts in nonstudded running shoes (RS) and in football shoes with natural (NTS) and synthetic turf studs (STS). Knee and ankle kinetic variables were analyzed with a 3 × 2 (shoe × movement) repeated-measures ANOVA (P < .05). A significant shoe-by-movement interaction was found in loading response peak knee adduction moments, with NTS producing smaller moments compared with both STS and RS only in 180° cuts. Reduced peak negative plantar flexor powers were also found in NTS compared with STS. The single-leg land cut produced greater loading response and push-off peak knee extensor moments, as well as peak negative and positive extensor and plantar flexor powers, but smaller loading peak knee adduction moments and push-off peak ankle eversion moments than 180° cuts. Overall, the STS and 180° cuts resulted in greater frontal plane knee loading and should be monitored for possible increased ACL injury risks.
authors.affiliation: Department of Kinesiology, Recreation, and Sport Studies, The University of Tennessee, Knoxville, TN.
authors.forename: Hunter J
authors.initials: HJ
authors.lastname: Bennett
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Brock
authors.forename: James T
authors.initials: JT
authors.lastname: Brosnan
authors.forename: John C
authors.initials: JC
authors.lastname: Sorochan
authors.forename: Songning
authors.initials: S
authors.lastname: Zhang
mesh_terms: D000843:Ankle Joint / Q000502:physiology*; D001696:Biomechanical Phenomena; D005430:Floors and Floorcoverings; D005538:Football / Q000502:physiology*; D064368:Healthy Volunteers; D006801:Humans; D007719:Knee Joint / Q000502:physiology*; D007866:Leg / Q000502:physiology; D008297:Male; D009068:Movement / Q000502:physiology*; D012775:Shoes; D019876:Sports Equipment; D013499:Surface Properties; D011795:Surveys and Questionnaires; D055815:Young Adult