Team handball players (N = 118) underwent a number of cognitive tests to examine how much of their decision making (DM) ability, as measured through responses to game slides projected to them for 2 seconds under low and high exertion levels (i.e., walking and running), was accounted for by cognitive components. A stepwise multiple linear regression… (More)
AIM Fencing requires rapid and accurate decision-making while competing and experiencing gradual perceived effort. This study examined the linkage between physical effort, simple reaction time and choice reaction time in fencers and non-fencer subjects. METHODS Two age-matched groups participated in this experiment: 12 professional fencers and 12… (More)
The purpose of the present study was to examine whether breathing pattern may be used as a reliable index for the effectiveness of techniques applied for the regulation of mental states. Heart rate (HR), breathing pattern, galvanic skin response (GSR), and electromyogram (EMG) of the frontalis muscle were measured in 39 male and female subjects aged 18-25… (More)
Many recent studies have reported that resistance training can be effective in producing strength gains among prepubescents. These studies appear to refute the early claims of ineffectiveness of resistance training in children. A meta-analysis procedure combines the results of individual empirical studies and estimates a standardised effect, termed effect… (More)
AIM Skillful performance in combat and racquet sports consists of proficient technique accompanied with efficient information-processing while engaged in moderate to high physical effort. This study examined information processing and decision-making using simple reaction time (SRT) and choice reaction time (CRT) paradigms in athletes of combat sports and… (More)
This study was concerned with the interactive role of experience of athletic skill with other relevant environmental variables (display complexity, attentional resources, exposure time of stimuli) on perception (recall) of structured handball game situations. Nineteen experienced (older) and 19 less experienced (younger) handball players were assigned… (More)
For F ∈ Z[X], let Ψ F (x, y) denote the number of positive integers n not exceeding x such that F (n) is free of prime factors > y. Our main purpose is to obtain lower bounds of the form Ψ F (x, y) x for arbitrary F and for y equal to a suitable power of x. Our proofs rest on some results and methods of two articles by the third author concerning… (More)
We estimate the density of integers which have more than one divisor in an interval (y, z] with z ≈ y + y/(log y) log 4−1. As a consequence, we determine the precise range of z such that most integers which have at least one divisor in (y, z] have exactly one such divisor.
55 rifle shooters were administered state-trait anxiety and self-control questionnaires. Shooting performance was recorded on 7 competitive occasions. Analysis indicated shooting performance is dependent more on anxiety state than on anxiety trait and self-control. Highly skilled shooters were less anxious and performed better across all competitions than… (More)
Let F k denote the k-bit mantissa oating-point (FP) numbers. We prove a conjecture of Muller according to which the proportion of numbers in F k with no FP-reciprocal (for rounding to the nearest element) approaches 1 2 − 3 2 log 4 3 ≈ 0:06847689 as k → ∞. We investigate a similar question for the inverse square root.