Browsing by Author "Zhu, Wei"
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Item Associations of vitamin D status with markers of metabolic health: A community-based study in Shanghai, China(2018-09) Zhu, Wei; Heil, Daniel P.Aims This study investigated the associations of vitamin D status (i.e., serum 25(OH)D concentration) with markers of metabolic health and metabolic syndrome (MS), as well as possible gender differences in these associations, with metabolic syndrome (MS) for a sample from Shanghai, China. Methods Demographic and anthropometric data, as well as 25-hydroxyvitamin D (serum 25(OH)D), blood glucose, and lipid concentrations were obtained for 508 urban residents aged 19–70 years. After grouping into tertiles according to their serum 25(OH)D concentrations, linear and logistic regressions were used to evaluate associations between serum 25(OH)D concentration and risk factors for MS across tertiles. Results A 1 ng/mL increase in 25(OH)D was associated with a significant decrease in total cholesterol by 0.25 mmol/L [95% CI: (−0.44, −0.05); P = 0.014] for the third tertile, with reference to the first tertile. Also, 1 ng/mL increase in 25(OH)D was associated with a significant decrease in LDL by 0.18 mmol/L [95% CI: (−0.35, −0.02); P = 0.026] for the third tertile. In addition, participants in the third tertile had a 54% reduction in the OR for MS [95% CI: (−1.10,− 0.02), P = 0.041]. Lastly, while there was no gender difference in vitamin D deficiency status, the non-MS women had significantly higher 25(OH)D level than those with MS (30.1 ± 5.8 vs. 28.5 ± 5.9 ng/mL, P = 0.035), while no such difference was observed for men. Conclusions Higher serum 25(OH)D concentration was associated with a better metabolic profile and thus a lower risk for developing MS in urban Shanghai residents of China.Item Characterizing the Aerobic and Anaerobic Energy Costs of Polynesian Dances(2018-01) Zhu, Wei; Lankford, David E.; Reece, Joel; Heil, Daniel P.This study characterized both aerobic and anaerobic energy expenditure (EE) for several Polynesian dances in a group of experienced professional Polynesian dancers. Thirteen men and 17 women were tested using indirect calorimetry to assess aerobic EE (and converted to METs), and fingertip blood lactate to estimate anaerobic EE, during both resting and dancing activities. Total EE was then computed as the sum of both aerobic and anaerobic activity energy expenditure (AEE, or EE above resting). One sample t-tests compared mean MET values for each type of dance to the 3-MET and 6-MET thresholds for moderate and vigorous physical activity (MVPA), respectively. Mean MET values for all dances, except the Maori poi balls dance (Mean±SD: 3.7±1.1 METs; P=0.340), were significantly >3.0 METs (5.9±3.1 METS; P=0.005 for Maori haka; 6.5±2.4 METs for Hawaiian hula; 6.6±1.2 METs for Samoan sasa; 9.6±1.5 METs for Samoan slap; 8.3±1.8 METs for Tahitian; 6.0±2.3 METs for Tongan; 7.0±2.6 METs for Fijian; P<0.001). Mean METs for Samoan slap and Tahitian were also significantly >6.0 METs (P=0.002 and P<0.001, respectively). Aerobic and anaerobic AEE contributed an average of 83.4% and 16.6%, respectively, across all Polynesian dances, with Hawaiian hula being the most aerobic (88.7%) and Samoan slap being the least aerobic (74.2%). Thus, the Polynesian dances tested not only met the current MVPA intensity guidelines (i.e., ≥3.0 METs), each dance also had a large anaerobic EE. These data suggest that Polynesian dancing is an appropriate mode of aerobic exercise for health promotion and disease prevention.Item The Energy Expenditure of Tinikling: A Culturally Relevant Filipino Dance(2019-01) Heil, Daniel P.; Angosta, Alona D.; Zhu, Wei; Alforque-Tan, RhigelFilipino Americans have higher risks for developing cardiovascular disease than many other U.S. minority groups and Caucasians. As a precursor to developing a culturally-relevant physical activity (PA) intervention targeting high-risk Filipino Americans, this study sought to evaluate the energy cost and intensity of Tinikling, or bamboo dance, a popular type of Philippine folk dance. These energy cost values were directly compared to the moderate-to-vigorous PA (MVPA) cut-points commonly used to define the PA guidelines. Twenty-two pairs of Filipino American adults performed five minutes of continuous Tinikling dance to a three-count rhythm and standardized music. Each dancer wore a portable metabolic system to directly assess the oxygen uptake from the last two minutes of dancing. These metabolic data were then transformed to units of metabolic equivalents (METs). Mean METs for all dancers (Mean ± SD; 6.9 ± 1.4 METs; P<0.001), as well as for women (6.9 ± 1.3 METs; P<0.001) and men analyzed separately (7.0 ± 1.0 METs; P<0.001), were significantly higher than both 3.0 and 6.0 MET MVPA cut-points. These results support the use of Tinikling dance with Filipino American adults as a PA intervention tool in future studies, as well as a means to satisfy the guidelines for prescribed weekly PA.Item The metabolic demands of culturally-specific Polynesian dances(Montana State University - Bozeman, College of Education, Heatlh & Human Development, 2016) Zhu, Wei; Chairperson, Graduate Committee: Daniel P. HeilIt is suggested that dancing is a form of exercise that induces favorable physiological and psychological effects comparable to aerobic exercise training. The current study sought to measure the metabolic demands for several Polynesian dances (i.e., Hawaiian hula, Fijian, Maori haka and poi balls, Samoan sasa and slap, Tahitian, and Tongan), and to evaluate possible gender differences in these measures in a group of experienced Polynesian dancers. Thirty participants (13 men and 17 women) were tested through a dance testing protocol, using indirect calorimetry. Metabolic demands were evaluated in units of metabolic equivalent (MET), as well as both aerobic and anaerobic activity energy expenditure (AEE) contributions to total AEE. One sample t-test was used to compare the mean MET values for each cultural dance to the cutoff values (3-MET and 6-MET, respectively) for moderate and vigorous physical activity. Gender differences were examined using independent t-tests. The mean MET values for all, but Maori poi balls dance, were significantly greater than 3.0 METs. The mean MET values for Samoan sasa, Samoan slap and Tahitian were also significantly greater than 6.0 METs. The men's MET values for Hawaiian hula, Samoan sasa, Tongan, Fijian, and Maori haka were all significantly greater (P < 0.001) than the corresponding values for women, while the Tahitian MET values were similar (P = 0.526) between both genders. Aerobic and anaerobic AEE contribute 83.4% and 16.6%, respectively, on average, for Polynesian dances, with Hawaiian hula being the most aerobic (88.7% and 11.3%, respectively) and Samoan slap being the least aerobic (74.2% and 25.8%, respectively). The aerobic AEE for men was significantly greater than that for women for the Hawaiian hula, Samoan sasa, Fijian, Maori haka, and Tongan (P < 0.001), while no significance gender difference was observed in anaerobic AEE (P = 0.087 - 0.989). The present study indicated that the Polynesian dance of various forms met the current PA recommendations, and thus can be used as an appropriate mode of aerobic exercise to increase regular physical activity in the ethnic minorities in Hawaii and the south Pacific for health promotion and disease prevention.