Abstract Introduction: In this work, we use simulated data to quantify the different failure mechanisms of a previously presented low-cost jump height measurement system, based on widely available consumer smartphone technology. Methods: order assess importance preconditions algorithm, generate synthetic dataset 2000 random parabolas for randomly generated persons without real-world artifacts. ...

BACKGROUND The aim of the study was to verify the association between body composition and physical fitness with bone status in children and adolescents. METHODS A cross-sectional study was conducted with 300 healthy students (148 boys, 152 girls). Weight, height, fat and fat-free mass, and percentage of body fat (%BF) were evaluated, as were physical fitness (abdominal exercise, flexibility,...

Abstract Objective To verify the effects of successive judo matches on interlimb asymmetry and bilateral deficit in athletes. Design Repeated measures; Setting University Judo center. Participants Fourteen male Outcome measures Four simulated consisting 4-min. Before first match after each athletes were submitted to single leg tests – Countermovement Jump (SLCMJ) Standing Long (SLSLJ), handgrip...

The reasons why using the arms can increase standing vertical jump height are investigated by computer simulations. The human models consist of four/five segments connected by frictionless joints. The head-trunk-arms act as a fourth segment in the first model while the arms become a fifth segment in the second model. Planar model movement is actuated by joint torque generators. Each joint torqu...

BACKGROUND Mechanical loading during childhood plays a critical role in normal growth and development of the skeleton. Ground reaction forces (GRFs) may provide a surrogate measure for the strain experienced by bone on landing and at take off. However, there appear to be no paediatric studies that assess GRFs across a variety of loading activities. OBJECTIVES To measure biomechanical variable...

In this study, we attempt to answer the following question: To what degree the higher muscular activity determined by increased load in the extension phase (eccentric muscle action) of vertical jump affects its efficiency? Ten high performance acrobats participated in this investigation. The acrobats performed tests that consisted of five single "maximal" standing vertical jumps (counter moveme...

The purpose of this study was to compare the acute effects of static stretching on vertical jump in trained male athletes. 25 healthy male athletes (age: 20.8 ± 2.3 years) who were National league 1 and 2, basketball, volleyball and handball players participated in the study. Subjects performed a 5 minute warm up followed by each of the following three stretching conditions on separate days wit...