The Effect of Recombinant Bovine Somatotropin on Patterns of Milk Production, Lactational Milk Estimates and Net Farm Income

Bovine somatoropin (bST) alters total milk production and production patterns in dairy cows and understanding the economic benefits of bST for the dairy producer are critical. Holstein cows (n = 555) from four Michigan dairy farms were randomly assigned as untreated controls or to receive 500 mg of bovine somatotropin (PosilacR) administered every 14 days beginning at 63 to 69 days of lactation and continuing until approximately 21 days prior to the end of lactation or until the animal was removed from the herd. Average peak milk production was 50.8 kg / day and occurred at an average of 113 9 days of lactation for bST-treated cows while average peak production was 48.9 kg / day occurring at an average of 86.4 days of lactation for control cows; both parameters were significantly greater for bST-treated cows compared to controls. Study cows treated with bST were significantly more persistent in lactation (7% greater lactational persistency) compared to control cows. All DHIA estimates and actual milk produced were not significantly different between the study treatment groups for any of the four comparisons made (first, second, third monthly tests after bST treatment initiation and final (305-day) DHIA production estimates); however, the accuracy of DHIA production estimates was significantly affect by the amount of time elapsed since bST but became non-significant by the third DHIA test date. The use of bST changed NFI for each of the four study farms by $96.21,$3.57, $78.71 and ($7.15) per bST-treated cow, respectively during the trial period (from 63 to 305 days of lactation). The overall average change in NFI attributable to bST was $43.01 per bST-treated cow. 2 Profitability of bST use was observed to be quite variable between farms studied because many factors were found to affect the change in NFI per cow resulting from bST use; the level of production response and the price received for milk had the largest effects on the change in NFI associated with bST use; by contrast, price paid for bST itself and feed had only minimal effects on bST-associated profitability. Diseases that may be associated with bST may reduce the profitability of this product and need to be considered as a cost of bST use if present.bovine somatotropin, dairy, net farm income, Farm Management, Livestock Production/Industries, Productivity Analysis, Research and Development/Tech Change/Emerging,

The Role of Coach’s Gender on Coaching Self-Efficacy for Division III Female Student-Athletes

The landscape of women in college sports has improved dramatically since the enactment of Title IX in 1972. Participation rates and funding have increased, providing a more inclusive environment for female student-athletes to compete. However, females ascending to leadership positions within the NCAA has experienced a downward trend. Currently, males hold the majority of athletic director positions and serve as head coaches on over half of female varsity sport teams. This may be detrimental to female student-athletes as women in leadership positions provide same-gender role models and mentors relationships for female student-athletes. The purpose of this study is to examine the relationship between coaching gender and perceived self-efficacy of female student-athletes to pursue coaching as a profession, while also investigating the impact of perceived barriers (discrimination and working hours) to entering the field. The sample population, Division III female student-athletes (n=192), regardless of their coach’s gender, indicated having high coaching self-efficacy. Additional findings found that coaching self-efficacy had a statically significant relationship with gender (p=.48), desire to coach (

Zumba in the Postindustrial Midwest: Minority Women and Access to Physical Fitness

Historically, minority women have had limited access to health care resources. Healthy People 2020 identified the promotion of activity and wellness as a key for eliminating heath disparities in ethnic minorities, as minority women are not significant consumers of exercise programming. This study explored participation of a sample of underserved African American women in an individualized Zumba exercise program. The underserved sample was taken from a postindustrial Midwestern city. Participants (n = 35, Mage = 45.75) completed a 4-month aerobic intervention program offered through an accessible gym. At program completion, they responded to a semistructured survey that gauged reasons for participation, perceived enjoyment, and effectiveness. In addition, the survey prompted recommendations and suggestions for future programming. Low cost and entertainment aspects were the most commonly cited reasons for participation. Most participants found the program enjoyable and effective and expressed interest for participating in similar events in the future

An Exploratory Examination of Burnout in NCAA Division II Athletes

The purpose of this study was to assess the causes of burnout among student-athletes in Division II institutions. The authors distributed the Athlete Burnout Questionnaire (ABQ) to 125 undergraduate student-athletes enrolled at three Division II colleges and universities. The athletes competed in various sports. A 2 (Gender) × 2 (Type of Scholarship) × 2 (School Status) analysis of variance revealed that women and men reported different levels of burnout dependent upon type of scholarship. Men with no scholarship reported the lowest levels of burnout among the three types (None/Academic/Athletic), whereas women with no type of scholarship reported the highest levels of burnout. The authors discuss the results and offer implications, limitations, and future directions

Who should we hire?: Examining coaching succession in NCAA Division I women’s basketball

The purpose of this study was to evaluate the performance of newly hired coaches in relation to their predecessors, and utilize the analysis to provide guidance to decision makers in college athletic departments. This study examined 185 coaching changes in Division I women’s basketball in 16 conferences between 2000 and 2009. Data were collected from online sources including institutional websites, media guides, and media articles. Latent class analysis was employed to reduce the data to one item per factor. Factors included demographics, coaching ability, coaching experience, past team performance, hiring factors (coaching level change, inside/outside hire, interim, conference affiliation), and institutional factors (public/private, demographic market area, enrollment, budget, and National Association of Collegiate Directors of Athletics standings). Mixed models analysis was performed to identify which categories have a relationship with changes in the number of wins following a coaching change. Results suggest that past team performance was the strongest indicator of future performance after a coaching change

A Post-Succession Analysis of Factors Influencing Coaching Success in NCAA Division I Men’s Basketball – Journal of Issues in Intercollegiate Athletics

Based on the reciprocal determinism component of social learning theory, a total of 736 men’s NCAA Division I basketball coaching changes between 1999 and 2014 were examined to establish which factors were related to conference success following a coaching change. Results from an exploratory latent class analysis indicated that many demographic, environmental, and experiential variables assumed to be important in hiring a new coach are insignificant. However, a program’s previous success, individual coaching ability, and previous coach vacancy circumstance are all significantly related to conference winning differential after a coaching change. Results also indicated a regression to the mean occurs after most coaching changes except for the most elite programs. Pragmatically, however, findings show relatively small increments in winning or losing following a coaching change, suggesting that the impact of a coach is often overstated. Stakeholders can use this information to evaluate coaches, programs, and hiring practices in men’s Division I basketball

Pedometers and Aerobic Capacity: Evaluating an Elementary After-School Running Program

Childhood obesity affects 1 of every 6 youth in the United States. One contributing factor to this statistic is a lack of physical activity (PA). Demands related to accountability which are placed on educators to demonstrate academic achievement often result in resistance to allocating time during the school day for PA. One possible solution is to consider utilizing time after school to integrate PA programs. The purpose of this study was to assess the impact of a 12-week after-school pedometer-focused PA program on aerobic capacity and to examine the relationship between step count and aerobic capacity in elementary school aged children. A group of elementary students (n=24; 9.5±0.9 years) participated in a 12-week pedometer-focused PA program that included pretraining and posttraining fitness testing via the 20-meter version of the PACER test. Paired sample t-tests revealed significant differences between the pretest (M=21.0 laps, SD=9.9) and posttest (M=25.2 laps, SD=12.2) scores (t=4.04, P≤0.001). A Pearson correlation revealed no significant relationship between individual step count and the difference between PACER pre- and posttest (r=0.318, P=0.130). The program improved aerobic capacity, but an increase in pedometer-calculated step count was not a predictor

Analysis of the separation angle between the thorax and pelvis, and its association with performance in the hammer throw

The hammer throw is perhaps one of the most misunderstood and difficult events to learn in track and field. Improvements in technique are focused on strategies designed to increase implement release velocity. The purpose of this cross-sectional investigative study was to examine the association between the angle of separation between the thorax and pelvis and performance in the hammer throw. Two male and four female throwers were used to assess positional data of the hammer, thorax, and pelvis. Hammer positional data were used to determine linear hammer speed at release, release angle, and release height. Thorax and pelvis positional data were used to determine thorax rotation relative to the pelvis (separation angle). The association between values of separation angle at key instances and performance was examined. Performance was determined by distance thrown (55.69 ± 3.42 m). Release speeds (24.32 ± 0.70 m/s) were also examined as a contributory factor towards performance and were included to account for instances where throwers released the hammer using sub-optimal release heights and angles which negatively affected distance thrown. The separation angle at its smallest within each turn was found to have a strong negative association with the performance indicators, especially in the first two turns (significant correlates ranged from −0.82 to −0.97). This finding indicates when throwers reduced the separation to a smaller value, performance was enhanced. Separation angle was at its smallest in double support. This suggests that throwers may improve performance by reducing the separation angle during double support phases

Practices, Perceived Benefits, and Barriers to Strength Training Among Women Enrolled in College

International Journal of Exercise Science 11(5): 226-238, 2018. The American College of Sports Medicine (ACSM) has recommended that resistance training be performed at least twice per week, with 8-12 repetitions of 8-10 exercises targeting all major muscle groups (1). However, Kruger, Carlson, and Kohl (18) reported that women were participating less than the U.S. population on the whole, as only 20% of women were engaging in resistance training two or more times per week. In order to better understand why only 1 in 5 women participate regularly in this form of physical activity, this study investigated current resistance training practices, perceived benefits, and barriers to resistance training among college women. One-hundred and sixteen women college students from a large, public, Midwestern university participated in this study. Correlation and hierarchical multiple regression analyses were used to identify the strongest predictors of resistance training behaviors. The predictors in the regression model included demographic characteristics in block one, perceived barriers to resistance training in block two, and perceived benefits of resistance training in block three. Results indicated that the level of perceived “time/effort” barriers significantly predicted resistance training behavior. Findings in this area may help researchers, university recreation programmers, personal trainers, and other health and fitness professionals better understand the attitudes and actions of college women regarding resistance training, toward the goal of promoting fitness center environments that college women find more inviting

Mood and Performance Anxiety in High School Basketball Players: A Pilot Study

International Journal of Exercise Science 10(4): 604-618, 2017. Participation in competitive sport may impact psychological measures, such as mood and performance anxiety, which in turn may impact enjoyment, adherence, continued participation, and so on. This study assessed the feasibility – in terms of process, resources, management, and potential scientific value– of measuring the effect of varying competitive challenges upon the mood and performance anxiety measures of high school athletes. The participants (n=12) consisted of the boys’ varsity basketball team at a high school in a rural Midwestern community. Participants completed the Profile of Mood States (POMS) to assess mood and the Sport Anxiety Scale-2 (SAS-2) to assess performance anxiety, respectively. Survey administration occurred at baseline and prior to games designated as non-conference, conference, and state tournament. A-priori feasibility measures were achieved in this prospective design. Significant correlations on the subscale measures were found on the POMS and SAS-2 administered before the four conditions in this study; Chronbach’s alpha ranged from 0.54- 0.94 across conditions for POMS subscales, and Chronbach’s alpha ranged from 0.73-0.97 across all conditions for SAS-2 subscales, respectively. Significant differences were found across conditions in the POMS subscale confusion [F(3,33) = 5.71, p = 0.01] and in the SAS-2 subscale worry [F(3,33) = 6.13, p=0.01]. These preliminary findings suggest that the competitive conditions in this study significantly affected some measures of mood and performance anxiety in high school basketball players. These findings warrant further investigation, as well as suggest coaches could gather such information from their players, ultimately aiding in player development and team performance