A school-based intervention program in promoting leisure-time physical activity: Trial protocol

Background: Regular participation in moderate-to-vigorous physical activity (MVPA) is important to manage obesity. Physical education (PE) is considered to play an important role in promoting lifelong participation in physical activity (PA) because it provides an existing network where cost-effective interventions can be implemented to produce sustainable change in health behavior. However, the association between compulsory school PA (e.g., PE lessons) and body composition levels has received mixed support in the literature. Therefore, the present study aimed to investigate whether a school-based intervention targeting salient PA benefits and barriers grounded on the theory of planned behavior would promote young people's participation in MVPA during leisure time and reduce body mass index (BMI) of overweight students. Methods/design: A total of 171 students from 3 secondary schools in Singapore underwent the control condition followed by the intervention condition. Both the conditions consisted of PE lessons twice per week over 4 weeks. In the control condition, PE teachers encouraged students to participate in PA during leisure time without providing persuasive message. While in the intervention condition, PE teachers delivered persuasive messages that targeted the salient benefits and barriers associated with PA to the students at the last 5 to 10 min of each PE lesson. PA levels over a week were measured objectively with wrist-mounted GENEActiv Original accelerometers and subjectively with self-reporting questionnaires three times (Baseline, Post 1, and Post 2) in each condition. Student's self-reported PA level was measured using the Leisure-Time Physical Activity Participation Questionnaire and the International Physical Activity Questionnaire, and their attitudes, intentions, subjective norms and perceived behavior control towards leisure-time PA were measured with a questionnaire based on the theory of planned behavior. Furthermore, students' intention, determination and willingness to engage in leisure-time PA were compared with the other activity (e.g., doing homework, shopping). Discussion: This study will provide the evidence on the effectiveness of a cost-effective school-based intervention on reducing BMI of overweight students through promoting sustained participation in leisure-time PA. It will also address methodological issues on the gaps between objective and subjective measures of PA. Trial registration: This trial is registered with the ISRCTN registry (ISRCTN73786157, 26/10/2017, retrospectively registered)

Effects of music on recreational runners' performance and subjective experiences during and after running

The purpose of this study was to examine the effects of music on recreational runners’ performance and subjective experiences during and after a 30 minutes run. Previous research reported that music yields several benefits on running when compared to the control condition. This study hypothesized that music improves runners’ performance and provides more positive experience during and after the run when compared to control. In this study, a group of 20 healthy undergraduate students from Nanyang Technological University (10 male, 10 female; M age = 23.6 years, SD = 1.57; M body mass index = 21.4 kg/m2, SD = 1.89) were randomly selected and assigned to control and music condition. They performed a 30 minutes run on treadmill at moderate intensity over 2 trials. Findings showed significant difference in rate of perceived exertion (p = .024), feeling scores (p = <.001) and felt arousal scores (p = <.001) during the 30 minutes run. Furthermore, the scores of subject vitality (p = .026), perceived performance (p = .001), interest/enjoyment (p = .021) and perceived competence (p = <.001) in the music condition were significantly better than those in the control condition. In conclusion, runners’ ran significantly further and elicited more positive experience during and after running in the music condition when compared to the control condition.Bachelor of Science (Sport Science and Management

A multiple mediation analysis of the association between asynchronous use of music and running performance

The purpose of this study was to examine if the effects of asynchronous use of music on running performance are directly and/or indirectly carried through psychological, psychophysical, and psychophysiological benefits. Following a standardized music selection procedure, 20 healthy undergraduate students (10 males, 10 females) completed a 30-min treadmill run at perceived moderate intensity while listening to music (135–140 beats per minute) or under a no-music condition in a randomized order. Participants’ affective valence, arousal, perceived exertion, heart rate during the run, and running distance were measured in both trials. A mediation analysis was conducted for 40 data collected from the 20 participants under two conditions (no music; music) with a parallel mediation model in which affective valence, arousal, heart rate, and perceived exertion were specified as mediators. A significant indirect effect of affective valence was observed for running distance. The present finding supports the notion that the relationship between asynchronous use of music and running distance is mediated by psychological benefits

Pseudo-Anaphylactic Reactions to Pfizer BNT162b2 Vaccine: Report of 3 Cases of Anaphylaxis Post Pfizer BNT162b2 Vaccination

10.3390/vaccines9090974VACCINES9

Large-Scale Whole-Genome Sequencing of Three Diverse Asian Populations in Singapore

Because of Singapore's unique history of immigration, whole-genome sequence analysis of 4,810 Singaporeans provides a snapshot of the genetic diversity across East, Southeast, and South Asia.</p