Effects of a Three-Set Tennis Match on Knee Kinematics and Leg Muscle Activation during the Tennis Serve.

The purpose of this study was to determine the effect of a three-set tennis match on knee kinematics and leg muscle activation during the tennis serve in a real-time environment. Motion capture data and wireless electromyography of hamstrings and quadriceps muscles were collected from the back leg during the serve. A reduction of maximum knee flexion angle and a decrease of electromyography amplitudes in leg muscles were observed during the match.

Effect of the Power Balance® band on static balance, hamstring flexibility, and arm strength in adults.

The purpose of this study was to determine the effect of Power Balance® bands on strength, flexibility, and balance. Strength and flexibility were measured using the MicroFit system. Strength was measured via a bicep curl and flexibility via the sit-and-reach method.

Information processing capacity while wearing personal protective eyewear.

It is difficult to overemphasize the function vision plays in information processing, specifically in maintaining postural control. Vision appears to be an immediate, effortless event; suggesting that eyes need only to be open to employ the visual information provided by the environment. This study is focused on investigating the effect of Occupational Safety and Health Administration regulated personal protective eyewear (29 CFR 1910.

Effects of information processing load in abstinent and nonabstinent smokers' psychomotor task performance.

Recent evidence has indicated that nicotine, the active agent in tobacco, may affect mental abilities of smokers. To better understand the effects of nicotine on central processing, we used a basic chronometric approach to studying information processing. This chronometric approach allowed for the independent examination of nicotine's effects on two theoretically nonoverlapping information-processing stages, stimulus identification and response programming.

Effect of five weeks of strength and flexibility training on associations between self-reported and performance-based measures of physical fitness in older African-American adults.

Previous research suggests that older adults' perceptions of personal physical fitness are limited, especially for muscular strength and flexibility, and that these perceptual limitations may be the result of an insufficient referent for discerning appropriate muscular strength and flexibility. This study evaluated whether 5 wk. of strength and flexibility training would provide the additional experiences necessary for older adults to strengthen the correlations between their self-reported and performance-based measures of physical fitness, specifically for the subcomponents of strength and flexibility.

Use of self-reports of physical fitness as substitutes for performance-based measures of physical fitness in older adults.

The purpose of the present study was to evaluate the association between self-reported physical fitness and performance-based measures of physical fitness in older adults. The specific components of physical fitness evaluated included aerobic endurance, muscular strength, and flexibility. Adults (25 men and 47 women) ranging in age from 56 to 92 years (M age=75 yr.

Nicotine deprivation effects on the dissociated components of simple reaction time.

The effect of smoking abstinence on the dissociated components of a simple reaction-time response was investigated. 7 subjects completed two experimental sessions conducted one week apart. Each experimental session was comprised of two tests.