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@#Introduction: High-intensity interval training (HIIT) has been found to improve cardiometabolic health outcome as compared to moderate-intensity continuous exercise. However, there is still limited data on the benefits of HIIT on the expression of regulatory proteins that are linked to skeletal muscle metabolism and insulin sensitivity in obese adults. This study investigated the effects of HIIT intervention on expressions of peroxisome proliferatoractivated receptor-γ coactivator 1-α (PGC-1α) and adiponectin receptor-1 (AdipoR1), insulin sensitivity (HOMAIR index), and body composition in overweight/obese individuals. Methods: Fifty overweight/obese individuals aged 22-29 years were assigned to either no-exercise control (n=25) or HIIT (n=25) group. The HIIT group underwent a 12-week intervention, three days/week, with intensity of 65-80% of age-based maximum heart rate. Anthropometric measurements, homeostatic model of insulin resistance (HOMA-IR) and gene expression analysis were conducted at baseline and post intervention. Results: Significant time-by-group interactions (p<0.001) were found for body weight, BMI, waist circumference and body fat percentage. The HIIT group had lower body weight (2.3%, p<0.001), BMI (2.7%, p<0.001), waist circumference (2.4%, p<0.001) and body fat percentage (4.3%, p<0.001) post intervention. Compared to baseline, expressions of PGC-1α and AdipoR1 were increased by approximately three-fold (p=0.019) and two-fold (p=0.003) respectively, along with improved insulin sensitivity (33%, p=0.019) in the HIIT group. Conclusion: Findings suggest that HIIT possibly improved insulin sensitivity through modulation of PGC-1α and AdipoR1. This study also showed that improved metabolic responses can occur despite modest reduction in body weight in overweight/obese individuals undergoing HIIT intervention.
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@#Introduction: Lack of healthy food choices at the worksite is associated with unhealthy eating habits and poor diet quality. This study aimed to conduct a two weeks pilot study to assess the diet quality of lunch-meals delivered to worksites. Methods: Using a crossover study design, a total of 50 adults were purposely recruited from among university and hospital staffs in Selangor. Participants were randomised into two groups, whereby in week one, Group A was provided with the study’s “healthy lunch-meals” (RD4U©) for 3 work days/week, while Group B consumed their usual lunch. In week two, the groups switched over with Group B receiving RD4U© lunch-meals for three days. Diet quality of the lunch meals was assessed using the Healthy Eating Index for Malaysian (HEI-M). Participant satisfaction for RD4U© service was determined using SERVQUAL. Results: Mean protein consumption was significantly higher (27±4 g/day) while fat consumption was significantly lower (18±5 g/day) for the RD4U© lunch-meals, compared to the respective levels (24±11 g/day; 22±12 g/day) for the usual lunch meals. Total HEI score of the RD4U© meals (61.9±9.2) was higher than that for the usual lunch meals (56.1±11.2). Nonetheless, the overall diet quality scores indicate that both RD4U© and usual lunch meals were in the “need improvement” category. Generally, participants were satisfied with the RD4U© lunch-meal service. Conclusion: The RD4U© lunch-meals showed potential in delivering healthy lunch to worksites, and feasibility studies to expand the RD4U© delivery service is recommended.
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Literature data on association between physical activity (PA) and health related quality of life (HRQoL) in non-clinical adults population are still limited. Thereby, the objective of this study was to evaluate the association between PA and HRQoL among the non-academic staff serving the Faculty of Health Sciences (FSK), Universiti Kebangsaan Malaysia (UKM), Kuala Lumpur (KL). In this cross sectional study, 105 non-academic staffs aged between 18 to 60 years were recruited. Self-administered questionnaires (Malay version of the International Physical Activity Questionnaire and World Health Organisation Quality of Life-Brief Version) were administered among the participants. Mann Whitney test and Spearman’s rho correlation were employed for the statistical analysis using SPSS version 22.0 Majority of participants (72.4%) demonstrated high PA scores of ≥ 3000 MET-minutes/week. PA scores between genders was not statistically significant (p = 0.137). However, total PA score of support staffs (median = 9039.0, IQR = 15811.00) was significantly higher compared to staffs in management and professional group (median = 4329.0, IQR = 4189.00). The mean(SD) self-perceived HRQoL score was 3.4 (0.76). There were no significant correlation between PA and all domains of HRQoL such as physical health, psychological, social relationship and environmental domains (Correlation coefficient, ρ = -0.108, 0.003, -0.023, 0.026 respectively) with p = 0.273, 0.978, 0.818, 0.794 respectively. Majority of non-academic staffs of FSK, UKM engaged in high physical activity. The PA levels of support staffs were significantly higher than management and professional staffs. However, there was no statistically significant correlation observed between PA and domains of HRQoL.
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Life StyleABSTRACT
Stress is a common problem among university students and studies showed that involvement in exercise could help in reducing stress. However, information regarding the effect of high intensity progressive resistance training (PRT) using a resistant tube on stress among inactive and moderate active young male university students is limited. Hence, the aim of this study is to examine the effect of high intensity PRT using a resistant tube on psychological stress level, cortisol, DHEA and physical fitness in this population. A total of 30 male university students were participated in this quasi-experiment study. Intervention group (n = 14, age: 21.50 ± 1.37 yr) was participaned to carry out high intensity PRT by using resistant tube 3 times per week for 10 weeks; control group (n = 16, age: 21.29 ± 1.86 yr) was asked to continue their current lifestyle as usual. Before and after 10 weeks of intervention, psychological stress was measured by using PSS and SLSI questionnaires; cortisol and DHEA level were measured by using ELISA method. Timed up-and-go (TUG) used to examine dynamic balance and handgrip strength test used to measure muscle strength. Findings showed that the increased of DHEA level after 10 weeks of intervention was significantly difference between control and intervention groups (p < 0.05). There was no significant group difference in changes over time in anthropometric and body composition measurements, stress scores, cortisol level and physical fitness. High intensity PRT using resistant tube may be beneficial in increasing DHEA level among young male adults, which can act as a stress biochemical indicator.