Reducing prolonged sedentary time using a treadmill desk acutely improves cardiometabolic risk markers in male and female adults |
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| Authors: | Rachael B Champion Lindsey R Smith Jennifer Smith Bogdana Hirlav Benjamin D Maylor Stephanie L White |
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| Institution: | Institute for Sport and Physical Activity Research, School of Sport Science and Physical Activity, University of Bedfordshire, Bedford, UK |
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| Abstract: | This study evaluated the acute effects of interrupting prolonged sitting with an accumulated 2 h of light-intensity walking on postprandial cardiometabolic risk markers. In this randomised crossover trial, 24 participants (twelve males) aged 18–55 years took part in two, 6.5 h conditions: 1) prolonged sitting (SIT) and 2) sitting interrupted hourly with 20 min light-intensity treadmill desk walking at between 1.2–3.5 km/h?1 (INT-SIT). Standardized meals were provided at 0 h and 3 h. Blood samples and blood pressure measures were taken hourly. Statistical analyses were completed using linear mixed models. Postprandial incremental area under the curve responses (mmol/L?6.5 h) for glucose (4.52 3.47, 5.56] and 6.66 5.62, 7.71] for INT-SIT and SIT, respectively) and triglycerides (1.96 0.96, 2.96] and 2.71 1.70, 3.71] for INT-SIT and SIT, respectively) were significantly lower in INT-SIT than SIT. Mean systolic and diastolic blood pressure responses were lower by 3% and 4%, respectively, in INT-SIT than SIT (P < 0.05). There was no significant condition x sex interaction effect for any outcomes (P > 0.05). These findings suggest that interrupting sitting with an accumulated 2 h of light-intensity walking acutely improves cardiometabolic risk levels in males and females compared with prolonged sitting. |
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| Keywords: | Sedentary bout sedentary time physical activity cardiometabolic risk cardiorespiratory fitness |
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