This experiment was designed to examine the effects of resistance exercise on a manipulated preexercise mood. Participants were 40 undergraduate males who were randomly assigned to either resistance exercise or no-exercise, placebo activity. Prior to each session, participants were exposed to 1 of 3 mood inductions: positive, negative, or neutral, each of which was induced through the use of guided imagery. Resistance exercisers in the control condition reported increased anxiety and anger within 5 nun postexercise. This quickly dissipated, with anxiety falling below baseline values within 30 min postexercise. Neither condition was able to maintain the manipulated positive mood. Likewise, both conditions reduced the manipulated negative mood. However, the mood-enhancing effect of the placebo activity plateaued within 15 min. while the anxiolytic effect of exercise continued throughout recovery.
Peter J. Lang
Emotions are organized around 2 basic motivational systems, appetitive and defensive, that evolved from primitive neural circuits in the mammalian brain. The appetitive system is keyed for approach behavior, founded on the preservative, sexual, and nurturant reflexes that underlie pleasant affects; the defense system is keyed for withdrawal, founded on protective and escape reflexes that underlie unpleasant affects. Both systems control attentional processing: Distal engagement by motive-relevant cues prompts immobility and orienting. With greater cue proximity (e.g., predator or prey imminence), neural motor centers supercede, determining overt defensive or consummatory action. In humans, these systems determine affective expression, evaluation behavior, and physiological responses that can be related to specific functional changes in the brain. This theoretical approach is illustrated with psychophysiological and brain imagery studies in which human subjects respond to emotional picture stimuli.
Daniel T. Bishop, Costas I. Karageorghis and Georgios Loizou
The main objectives of this study were (a) to elucidate young tennis players’ use of music to manipulate emotional states, and (b) to present a model grounded in present data to illustrate this phenomenon and to stimulate further research. Anecdotal evidence suggests that music listening is used regularly by elite athletes as a preperformance strategy, but only limited empirical evidence corroborates such use. Young tennis players (N = 14) were selected purposively for interview and diary data collection. Results indicated that participants consciously selected music to elicit various emotional states; frequently reported consequences of music listening included improved mood, increased arousal, and visual and auditory imagery. The choice of music tracks and the impact of music listening were mediated by a number of factors, including extramusical associations, inspirational lyrics, music properties, and desired emotional state. Implications for the future investigation of preperformance music are discussed.
Mark H. Anshel and Craig A. Wrisberg
In the present study an attempt was made to determine the relative effectiveness of various warm-up activities in eliminating postrest warm-up decrement (WUD) in the tennis serve. Seventy highly-skilled players hit 20 serves, rested for either 5 or 15 min, and then attempted 4 final serves. During the last 2 min of the rest period, players continued to rest, ran in place, engaged in mental imagery, performed practice swings, or repeatedly hit the ball against the ground and caught it. In addition to estimates of serving accuracy, measures of somatic and cognitive arousal were obtained at the beginning and end of the rest interval. Multiple regression procedures revealed that reductions in WUD were significantly related to the restoration of prerest arousal levels. Between-group comparisons indicated that practice swings were the most effective warm-up activity for restoring somatic and cognitive arousal to prerest levels and for eliminating WUD. Theoretical discussion centered on possible applications of Nacson and Schmidt's (1971) activity-set hypothesis to the tennis serve.
Ben J. Smith and Catriona M.F. Bonfiglioli
Advocacy informed by scientific evidence is necessary to influence policy and planning to address physical inactivity. The mass media is a key arena for this advocacy. This study investigated the perceptions and practices of news media professionals reporting physical activity and sedentariness to inform strategic communication about these issues.
We interviewed media professionals working for major television, radio, newspaper and online news outlets in Australia. The interviews explored understandings of physical activity and sedentariness, attributions of causality, assignment of responsibility, and factors affecting news reporting on these topics. Data were thematically analyzed using NVivo.
Physical inactivity was recognized as pervasive and important, but tended to be seen as mundane and not newsworthy. Sedentariness was regarded as more novel than physical activity, and more likely to require organizational and environment action. Respondents identified that presenting these issues in visual and engaging ways was an ongoing challenge.
Physical activity researchers and advocates need to take account of prevailing news values and media practices to improve engagement with the news media. These include understanding the importance of novelty, narratives, imagery, and practical messages, and how to use these to build support for environmental and policy action.
Greg Lindsey, Yuling Han, Jeffrey Wilson and Jihui Yang
To model urban trail traffic as a function of neighborhood characteristics and other factors including weather and day of week.
We used infrared monitors to measure traffic at 30 locations on five trails for periods ranging from 12 months to more than 4 y. We measured neighborhood characteristics using geographic information systems, satellite imagery, and US Census and other secondary data. We used multiple regression techniques to model daily traffic.
The statistical model explains approximately 80% of the variation in trail traffic. Trail traffic correlates positively and significantly with income, neighborhood population density, education, percent of neighborhood in commercial use, vegetative health, area of land in parking, and mean length of street segments in access networks. Trail traffic correlates negatively and significantly with the percentage of neighborhood residents in age groups greater than 64 and less than 5.
Trail traffic is significantly correlated with neighborhood characteristics. Health officials can use these findings to influence the design and location of trails and to maximize opportunities for increases in physical activity.
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