Understanding of the Single-Item Physical Activity Question for Population Surveillance.

BACKGROUND: Sport New Zealand conducts continuous representative "Active NZ" surveys. Between 2019 and 2020 (n = 13,887), these surveys asked International Physical Activity Questionnaire (IPAQ)-long-form questions, the single-item days (SI-days) per week question, and 1 question on hours per week (single-item hours [SI-hours] per week). This study examines relationships between the established SI-days question and meeting physical activity (PA) guidelines (150 min moderate-to-vigorous physical activity per week from SI-hours question and IPAQ). METHODS: Analyses were descriptive, and the best fit between SI-days and the PA thresholds was estimated using area under the receiver operator characteristic curves and Youden index. RESULTS: Using SI-hours, 60.6% achieved 150+ minutes; 85.2% reported the IPAQ-total minimum threshold, and 40.8% met the IPAQ-leisure time PA-only threshold. Receiver operator characteristic analyses showed area under the curve values with IPAQ between 0.63 and 0.76, but the SI-days showed a very good area under the curve of 0.82 (0.81-0.83) with the SI-hours 150-minute threshold. Youden index suggested the best fit was at 3+ days per week for maximizing Sensitivity and Specificity to meet IPAQ or SI-hours-defined PA guidelines. DISCUSSION: The SI-days per week question reflects achieving PA guidelines, and the best fit was with the SI-hours per week question. This provides surveillance-relevant concurrent validity for the SI-days measure, but the cut point for broadly meeting guidelines appears to be at least 3 days per week, not 5 days per week as previously thought.

Screening for traumatic exposure and psychological distress among war-affected adolescents in post-conflict northern Uganda.

BACKGROUND: The war in northern Uganda has had a debilitating effect on the mental health of children and adolescents in the population. This study measures the prevalence and considers the aetiology of psychological distress in war-affected adolescents 4 years after the end of the conflict. METHODS: This is a cross-sectional study of 205 adolescents, aged 12-19, from a boarding primary school in Gulu, northern Uganda. A war experiences checklist was developed with the assistance of local professionals. The Impact of Event Scale-Revised (IES-R) measured post-traumatic stress symptoms. Finally, the Acholi Psychosocial Assessment Instrument (APAI) was used to measure locally described mental health constructs similar to the Western concepts of depression and anxiety. RESULTS: Four years after the end of the war, 57% of the students were still found to have clinically significant levels of post-traumatic stress symptoms using a similar cut-off score to previous studies among the same population. Both components of traumatic exposure: (i) the number of types of traumatic event experienced; and (ii) whether the adolescent was abducted were significantly associated with psychological distress. There was a strong correlation between post-traumatic stress symptoms and internalising symptoms. CONCLUSION: War-affected adolescents may continue to suffer from significant psychological stress in the years following the cessation of conflict. Multiple exposure to a number of different types of traumatic event may directly increase the likelihood of psychological distress especially for those exposed to the most extreme violence. The feasibility of employing a locally developed and validated screening instrument is demonstrated. Implications for future research and intervention in post-conflict areas are considered.

Optimizing exercise outcomes: the efficacy of resistance training using conventional vs. novel movement arcs.

The purpose of this study was to examine the effect of using multidirectional movement arcs in a resistance training program for the shoulder. It was hypothesized that multidirectional exercises performed against resistance would result in a greater positive adaptation of the muscle tissue than conventional movement patterns commonly used in strength training. Fourteen female athletes were initially assessed using a 1x repetition maximum (1xRM) test for shoulder flexion and shoulder abduction (dominant and nondominant arm). After randomization into 2 groups, subjects engaged in different strength training programs against Thera-Band resistance for 6 weeks. Follow-up testing was then completed. Group A was assigned a strength training program that used conventional curvilinear movement arcs. Group B completed resistance training that comprised multidirectional exercises. Both the conventional and novel strength training programs induced improvements in the 1x RM test (p < 0.01). There was a trend toward greater improvements in the nonconventional training group, but this was statistically insignificant. This suggests that varying the axial or torsional loading of muscle fibers during strength training may confer further benefit to conventional methods of training variation. Consequently, further studies are indicated to investigate if resistance training that incorporates multidirectional movement arcs is more effective than those used in conventional strength training programs. This may have implications on the design of future training programs that aim to optimize strength gains.