strength task conditions. This suggests that the role of prenatal testosterone in influencing performance is particularly evident when under pressure. However, this interpretation should be treated with caution as studies have reported equivocal findings (i.e., some studies have found negative correlations
Jenny Meggs, Mark Chen and Danielle Mounfield
Gabrielle Ringenberg, Jill M. Maples and Rachel A. Tinius
by 1000 to obtain milliliters of oxygen consumed per kilogram lean body mass per minute which neutralizes the effect of body composition to better assess fitness. Statistical Analysis Based on the sample size ( N = 18), the correlations between actual and predicted VO 2max , and the α value set at 0
Jeffrey Martin, Betty Kelley and Candice Dias
In the current study we examined the relationships between stress predictors, stress, and burnout in female high school athletic directors (N = 52). Significant negative correlations between stress and hardiness and between stress and number of social support providers were found. Significant positive correlations between stress and time concerns, personnel concerns, and program success (e.g., winning) subscales of the athletic directing issues scale were also found. Subjects high in hardiness and with adequate social support networks, who also reported few athletic directing issues, were likely to report minimal stress. Significant positive correlations also indicated that stress was related to the burnout dimensions of emotional exhaustion, depersonalization, and personal accomplishment. Based on our results we supported and extended Kelley’s (1993; 1994) model of stress and burnout with a population of female athletic directors.
Jennifer L. Gay, Eva V. Monsma, Alan L. Smith, J.D. DeFreese and Toni Torres-McGehee
Growth and maturation may impact adolescent behavior and development of psychological disorders. Currently age at menarche is used as the primary marker of maturation, even though it occurs later than other indicators of growth such as peak height velocity (PHV). Maturity offset predicting age at PHV has not been validated in diverse samples. Anthropometric measures and self-reported age at menarche were obtained for 212 female athletes ages 11 to 16 years (M = 13.25). Shared variance between menarcheal age and estimated age at PHV (APHV) was small (R 2 = 5.3%). Discriminant validity was established by classifying participants as pre- or post-PHV or menarche (X2 = 32.62, P < .0001). The Pearson’s correlation between chronological age and age at PHV (r = .69) was stronger than with age at menarche (r = .26). Making informed decisions about accounting for growth and maturation using estimated age at PHV are offered.
Anne-Marie Elbe, Svein Barene, Katharina Strahler, Peter Krustrup and Andreas Holtermann
Flow is a rewarding psychological state that motivates individuals to repeat activities. This study explored healthcare workers’ flow experiences during a workplace exercise intervention. Seventy-nine females were assigned to either a 12-week football or Zumba exercise intervention and their flow experiences were assessed at the beginning, midway and at the end of the intervention. The results showed that both intervention groups experienced medium levels of flow and an increase in flow values over time. A significant positive correlation between experiencing flow midway through the intervention and adherence to regular physical activity 18 weeks after the end of the intervention was found. Furthermore, repeated measures throughout the intervention period showed a significantly different development of flow values over time for the adherers and nonadherers. Flow therefore may be of importance for adherence to regular workplace physical activity. Future research needs to investigate the importance of flow in other physical activity settings, especially also for male participants.
Vicki Ebbeck, Patti Lou Watkins and Susan S. Levy
This study examined possible determinants of some of the health behaviors of larger women. Specifically, it was of interest to discern if affect (depression, social physique anxiety) mediated the relationship between self-conceptions (global self-worth, perceived physical appearance) and behavior (disordered eating, physical activity). The investigation was grounded in the model of self-worth forwarded by Harter (1987). A total of 71 overweight or obese women agreed to participate in the study. Data collection involved a researcher meeting individually with each of the participants to record physical assessments as well as responses to a packet of self-report questionnaires. A series of canonical correlation analyses were then conducted to test each of the three conditions for mediation effects outlined by Baron and Kenny (1986). Results suggested that indeed the set of self-conceptions indirectly influenced the set of behaviors via the set of affect variables. Surprisingly, however, involvement in physical activity failed to contribute to the multivariate relationships. The findings further our understanding of how self-conceptions are related to behavior and highlight the value of examining multiple health behaviors in parallel.
Tracy Danner and Sharon Ann Plowman
The purpose of this study was to evaluate the influence of a preceding intense cycling bout on subsequent running economy in female duathletes and triathletes. Thirteen female duathletes and triathletes (age = 27.5 ± 3.36 yrs.) took part in three testing sessions: (a) measurement of running economy at 169, 177, 196, and 215 m·min−1 and running VO2 max; (b) remeasurement of running economy and measurement of cycling VO2 max; and (c) a 45 minute cycling bout at 70% of cycling VO2 max, immediately followed by measurement of running economy. Intraclass correlation coefficients between Day 1 and Day 2 running economy values ranged from 0.31 to 0.78. A systematic difference occurred at 169 m·min−1 only, with mean VO2 being higher on Day 1 than Day 2 (p<0.02). Based upon dependent t-tests, significantly higher running economy values (p<0.02) but not blood lactate concentrations (p>0.02) following the submaximal cycling bout compared to the control condition (mean of Day 1 and Day 2), at each of the four test velocities were found. Therefore we conclude that running economy was significantly impaired following a 45 minute intense cycling bout in female duathletes and triathletes, but lactate values remained constant.
Molly Burger and Dennis Dolny
The purpose of this study was to examine the relationships among body mass index (BMI), body image perception, physical activity habits, and exercise stage of change in college-aged females. Volunteers (N = 134) completed a survey of demographics, Stage of Exercise Scale (SOES; Cardinal, 1995a; Cardinal, 1995b), Physical Activity History questionnaire (PAH; Jacobs, Hahn, Haskell, Pirie, & Sidney, 1989), and Body Shape Questionnaire (BSQ; Cooper, Taylor, Cooper, & Fairburn, 1987). Participants were categorized into five exercise stages of change: precontemplation, contemplation, preparation, action, and maintenance. Relationships between the variables were analyzed with Pearson r correlations. Kruskal-Wallis independence tests were also used for analyses. Approximately 60% of the participants reported current physical inactivity or irregular exercise. BMI and body image score were significantly linearly related, with higher body mass indicating more negative body image (r = 30, p <.017). Significant differences existed between exercise stages for physical activity score, X2 (3, N = 134) = 19.98, p <.05. Based upon follow-up tests participants in the maintenance stage had significantly higher physical activity scores than all other stages. No significant differences were found for BMI or body image between exercise stages. Regular exercisers had the highest frequency of disordered eating and weight-preoccupied attitudes and behaviors. The majority of these women were not currently regularly physically active, professed dissatisfaction with their current level of activity, and expressed a fear of being fat. Further study directed at specific factors related to body image and exercise behaviors, as well as the impact of stage-specific interventions are suggested.
Cara L. Sidman, Jennifer L. Huberty and Yong Gao
This study has two purposes: (1) to observe the step-count patterns of adult women who participated in an eight-month healthy lifestyle-based book club intervention and (2) to describe step-count patterns across seasons and body mass index (BMI) categories. Sixty-two participants (mean age ± SD = 53 ± 9, 92% Caucasians) had complete pedometer data, which was used for data analysis. After weekly, hour-long, discussion-based meetings during months one through four, and bi-monthly meetings during months five through eight, women increased their step counts by 26%. Significant step-count differences were observed among seasons (p < .05), and from pre- to post-intervention (p < .05), with the lowest steps being reported in the fall and the highest in the spring. Women in the obese category continued to increase steps during the winter, while the healthy-weight group decreased steps. There was a significant correlation between the average steps taken during the intervention and changes in BMI from pre- to post-intervention (r = −.26, p < .05). Overall, positive step-count pattern observations were found among adult women participating in a healthy lifestyle-based intervention.
G.V. Kondraske and P.J.H. Beehler
Traditional human performance research methods have consisted of multiple regression statistical models based on data such as physical size parameters, reaction times, running speeds, and jumping power. Despite widespread use over many years, the success achieved with these methods has been poor to mediocre. Robust methods for prediction and discovery of insights into human performance remain illusive. The purpose of this paper is to introduce General Systems Performance Theory (GSPT) and the Elemental Resource Model (ERM) for human performance into the fields of physical education and sport. This theory and model collectively represent a new methodological approach with unique features that include: 1) modeling and measurement of all aspects of performance using resource constructs, 2) the use of cause-and-effect resource economic principles (i.e., the idea of threshold “costs” for achieving a given level of performance in any given high level task), and 3) the concept of monadology (i.e., the use of a set of “elements” to explain a complex phenomenon). Although the ERM is intended to encompass all attributes of performance of all human subsystems and to apply to any circumstance involving a human and task, we focus here on relevance and application to gender-related issues in physical activities. This is achieved, after presenting an overview of the ERM, by means of a description and discussion of a set of hypothetical experiments that may be used as a guide for conducting future research. Based on our preliminary investigations, we suggest that it may be appropriate to question the common practice of anticipating and seeking correlations between high level task performance and routinely acquired measures of more basic aspects of performance (e.g., the resources). In contrast to traditional statistical modeling methods, the new concepts and methods represent a cause-and-effect approach that is more similar to the process that an engineer uses to design a system capable of performing a specified task. We believe that the ERM and its associated methods offer a promising basis for a broad spectrum of research into often controversial, gender-related human performance issues and we encourage more widespread investigation, refinement, and implementation of the ERM and GSPT.