The aim of this study was to determine the precise effect of plyometric training (PT) on vertical jump height in healthy individuals. Meta-analyses of randomised and non-randomised controlled trials that evaluated the effect of PT on four typical vertical jump height tests were carried out: squat jump (SJ); countermovement jump (CMJ); countermovement jump with the arm swing (CMJA); and drop jum...

In the present study, the six legged concrete (SLC) elements are placed at the bed of a flume downstream of a chute in different layouts, densities and number of longitudinal rows of SLC elements. Each test was run for different flow conditions (Froude numbers ranged 5.3 to 8.1). During each test, the water surface profile, the roller length and the jump length measured.  Applying the experimen...

BACKGROUND In the field of vertical jump diagnostics, force plates (FP) are the reference standard. Recently, despite a lack of evidence, jump mats have been used increasingly. Important factors in favor of jumping mats are their low cost and portability. OBJECTIVES This validity study compared the Haynl-Elektronik jump mat (HE jump mat) with the reference standard force plate. MATERIALS AN...

Introduction: The depth jump (DJ) and squat (SJ) are accepted ways to assess train power producing ability but not without risk of injury. Methods: Sixteen male participants (age = 21.7 ± 1.54 yrs., height 177.7 11.4 cm, mass 77.7 13.6 kg) were evaluated for exertion capabilities while being assessed injury in the knee low back through a range resistances based on percentage participants’ heigh...

PURPOSE To determine whether the magnitude of performance improvements and the mechanisms driving adaptation to ballistic power training differ between strong and weak individuals. METHODS Twenty-four men were divided into three groups on the basis of their strength level: stronger (n = 8, one-repetition maximum-to-body mass ratio (1RM/BM) = 1.97 +/- 0.08), weaker (n = 8, 1RM/BM = 1.32 +/- 0....

The gaze behaviour of riders during their approach to a jump was investigated using a mobile eye tracking device (ASL Mobile Eye). The timing, frequency and duration of fixations on the jump and the percentage of time when their point of gaze (POG) was located elsewhere were assessed. Fixations were identified when the POG remained on the jump for 100 ms or longer. The jumping skill of experien...

This study’s purpose was to compare jump height, velocity and force production between video simulated blocking, [reactive timing (RT) jump], and maximal effort vertical jumping, [self-select timing (SST) jump]. 10 female collegiate volleyball players performed both jumps onto a force plate in a laboratory while being videotaped with one camera. Jump heights(cm), velocities(m/s), and forces(%BW...

* This research was supported by NIMH RO1 MH62480 and NSF BCS 00-91757, both awarded to JPS. Abstract – The Dynamic Field Theory (DFT) has been used to account for spatial recall biases in children and adults. This paper extends the DFT to a second spatial working memory task, position discrimination. The DFT captures details of adults’ discrimination performance, as well as predicting developm...

We develop and experimentally test a model of bidder behavior in a simultaneous ascending auction for heterogeneous common value goods. The model follows the ‘straightforward’ strategy developed by Milgrom (2000) while accounting for the adverse selection effect and the potential for the winner’s curse. When this model is evaluated against laboratory results we find that bidders deviate from th...