title: Normative data of vertical ground reaction forces during landing from a jump.
abstract: This technical report provides normative data of vertical ground reaction forces (GRFs) associated with landing from a jump. Subjects were 234 adolescents (mean age: 16 years) who were categorised by gender, activity level and type of sport played. Subjects jumped from a box 0.3 metres high to land on a force plate. Results showed that there were no significant differences (p>0.05) across gender, activity levels, and type of sport played. Across all subjects, the mean peak vertical GRF was 4.5 bodyweights (SD: 1.7). In regard to gender, mean peak vertical GRFs were 4.6 (SD: 1.7) and 4.2 (SD: 1.4) for males and females respectively. The mean peak vertical GRF for subjects involved in recreational sport 1-3 times per week was 4.4 bodyweights (SD: 1.7), while the mean for those playing competitive sport 4-7 times per week was 4.5 bodyweights (SD: 1.7). The mean peak vertical GRF for subjects participating in sports involving jumping and landing activities was 4.6 bodyweights (SD: 1.8) as compared to 4.4 bodyweights (SD: 1.5) for subjects in sports that did not involve jumping activities.
authors.affiliation: Neuromuscular Research Unit, School of Physiotherapy, Auckland Institute of Technology, New Zealand.
authors.forename: P J
authors.initials: PJ
authors.lastname: McNair
authors.forename: H
authors.initials: H
authors.lastname: Prapavessis
mesh_terms: D000293:Adolescent; D000328:Adult; D001696:Biomechanical Phenomena; D005260:Female; D006801:Humans; D008297:Male; D012016:Reference Values; D013177:Sports / Q000502:physiology*