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Loading Rate In Self-Initiated Vertical Jump Landings: Developmental And Gender Comparisons, Pamela Russell, Erik Swartz, Ron Croce, Laura Decoster
Loading Rate In Self-Initiated Vertical Jump Landings: Developmental And Gender Comparisons, Pamela Russell, Erik Swartz, Ron Croce, Laura Decoster
Pamela J. Russell
The study compared gender and developmental differences in vertical loading rate upon a two-footed landing from a self-initiated VJ. Fifty-seven subjects grouped by age (pre-pubescent (8-11 yrs); post-pubescent (19-29 yrs)) and gender consented to participate. Subjects jumped for a ball set at 50% of their maximum VJ height, and landed on two feet, facing forward, with only their dominant foot on the force plate. Motion analysis (3-D) and ground reaction force (GRF) data were collected. Statistical analyses indicated significant developmental differences in vertical loading rate normalized to kinetic energy, but no gender differences. Children may have higher loading rates because …
Predictors Of Adolescent Male Body Image Dissatisfaction: Implications For Negative Health Practices And Consequences For School Health From A Regionally Representative Sample, James Leone, Joyce Fetro, Mark Kittleson, Kathleen Welshimer, Julie Partridge, Stacia Robertson
Predictors Of Adolescent Male Body Image Dissatisfaction: Implications For Negative Health Practices And Consequences For School Health From A Regionally Representative Sample, James Leone, Joyce Fetro, Mark Kittleson, Kathleen Welshimer, Julie Partridge, Stacia Robertson
Mark J Kittleson
BACKGROUND: Adolescent males are more likely to sustain intentional and unintentional injuries, be involved in a physical confrontation, and be successful in suicide attempts. Body image dissatisfaction (BID) has been linked as a possible contributing factor to these negative health behaviors and risks; however, research is limited with males. The interaction of intrapersonal, interpersonal, and social variables in a holistic model has yet to be explored for males. Variables precipitating adolescent males to develop an unhealthy body image and act on negative health behaviors, such as body image drug use, were the impetus for this study. METHODS: A randomized cross-sectional …