Yaira Barranco-Ruiz

Systematic review of interventions for promoting active school transport

Active commuting to school has been recognized as a potential avenue to increase physical activity in children and adolescents. However, active commuting to school has declined over time, and interventions are needed to reverse this trend. The main aim in the current study was to update a previous systematic review on interventions focused on active travel to school, following the same methodology and addressing the quality and effectiveness of new studies detected in the more recent scientific literature. A systematic review was conducted to identify intervention studies of active commuting to school published from February 2010 to December 2016. Five electronic databases and a manual search were conducted. Detailed information was extracted, including a quantitative assessment comparing the effect sizes, with Cohens d, and a qualitative assessment using the Evaluation of Public Health Practice Projects tool. We identified 23 interventions that focused on active commuting to school. Among the 23 interventions, three were randomized control trials, 22 had a pre/post design, and 12 used control groups. Most interventions reported a small effect size on active commuting to school (14/23) (d: from -1.45 to 2.37). The quality assessment was rated as weak in most studies (21/23). Government funding continues investing in public policies to promote active commuting to school. However, even though seven years have passed since the last systematic review, research with high quality designs with randomization, greater sample size, and the use of valid and reliable instruments are needed.

A Novel Electromyographic Approach to Estimate Fatigue Threshold in Maximum Incremental Strength Tests

Evaluation of muscular fatigue thresholds in athletes performing short-duration and explosive exercises is difficult because classic parameters do not suffer large variations. Therefore, the aim of this study was to develop a new method to estimate the fatigue threshold in single muscles. Our approach is based on electromyographic data recorded during a maximum incremental strength test until the one repetition maximum is reached. Ten men and 10 women performed a half-squat strength test consisting of five incremental intensities of one repetition maximum. Neither heart rate nor blood lactate concentrations showed significant differences at the various intensities tested. Surface electromyographic activities of vastus lateralis, vastus medialis, and rectus femoris were recorded, finding a break point corresponding to the fatigue threshold occurring in men at 70.74%, 71.48%, and 72.52% of one repetition maximum, respectively. In women, break-point values were 76.66% for vastus lateralis, 76.27% for vastus medialis, and 72.10% for rectus femoris. In conclusion, surface electromyography could be a useful, rapid, and noninvasive tool to determine the fatigue threshold of independent muscles during a maximal half-squat strength test.

Association Between Active Commuting To School And Sleep Duration In Ecuadorian Youth: 3160 Board #65 June 2 3

PURPOSE: Active commuting has been associated to longer sleep duration in adolescents, however, the literature is still limited. Thus, the aim of this study was to investigate the association between the mode of commuting to and from school and sleep duration in Ecuadorian youth.METHODS: A total of

A short dance-exercise intervention as a strategy for improving quality of life in inactive workers:

Objective: To investigate the effects of a short exercise intervention based on the use of a Zumba Fitness® programme on the quality of life (QoL) in inactive adult workers. Design: Non-experimental pre-test/post-test study involving one experimental group of inactive university workers. Setting: Riobamba in the Andean region of central Ecuador. Methods: A total of 60 inactive adults working at a university (age: 39 ± 1.0 years; 80% women, who used to perform < 150 min of moderate-vigorous physical activity per week) completed a 5-week Zumba Fitness® exercise intervention (three classes per week, 60 minutes per class; outside of work hours). QoL was assessed using the 36-Item Short Form Health Survey (SF-36) administered at baseline, post-intervention and 2 months after the intervention. Data were analysed using a per-protocol analysis. Results: The 5-week intervention improved six out of eight subscales of QoL, including general health (baseline: 63.6±2.51; post-intervention: 68.0±2.5; p = .007), physical role (baseline: 82.1±3.8; post-intervention: 90.6±3.3; p = .029), emotional role (baseline: 71.3±5.0; post-intervention: 88.3±3.9; p = .001), social functioning (baseline: 76.9±2.6; post-intervention: 83.9 ± 2.6; p = .010), vitality (baseline: 60.4±2.8; post-intervention: 69.8±2.4; p < .001), mental health (baseline: 72.4±2.5; post-intervention: 80.4±2.3; p < .001) and the health transition perception item (baseline: 53.9±3.5; post-intervention: 63.6±3.1; p = .001). No statistical differences were found between post-intervention and 2-month follow-up; however, the majority of subscales which improved post-intervention (general health, emotional role, social functioning, vitality and mental health) were maintained at 2-month follow-up showing differences (p < .05) compared to baseline. Conclusion: A 5-week exercise intervention based on Zumba Fitness® programme could improve QoL in inactive adult workers and most improvements could be maintained at 2 months post-intervention.