High Intensity Interval- vs Resistance or Combined-Training for Improving Cardiometabolic Health in Overweight Adults (Cardiometabolic HIIT-RT Study): study protocol for a randomised controlled trial
Artículo académico
Background: Although evidence shows the positive health effects ofnphysical activity, most of the adult population in Colombia arensedentary. It is, therefore, important to implement strategies thatngenerate changes in lifestyle behaviours. This protocol describes anstudy in which we will compare the effects of 12 weeks of high-intensityninterval training (HIIT), resistance training (RT) or combined trainingn(HIIT + RT) on the improvement of body composition, endothelialnfunction, blood pressure, blood lipids, and cardiorespiratory fitness inna cohort of sedentary, overweight adults (aged 30-50 years).nMethods/design: Sixty sedentary, overweight adults attending primaryncare in Bogota, Colombia will be included in a factorial randomisedncontrolled trial. Participants will be randomly assigned to thenfollowing intervention groups: (1) non-exercise group: usual care withndietary support, (2) HIIT group: 4 x 4-min intervals at 85-95 % maximumnheart rate (HRmax) (with the target zone maintained for at least 2nminutes), interspersed with a 4-min recovery period, at 65 % HRmax, (3)nRT group: completing a resistance circuit (including upper and lowernmuscle groups) as many times as needed according to subject's weightnuntil an expenditure of 500 kcal at 40-80 % of one-rep max (1RM) hasnbeen achieved, and (4) combined group: HIIT + RT. The primary end pointnfor effectiveness is vascular function as measured by flow-mediatednvasodilatation 1 week after the end of exercise training.nDiscussion: The results of this study will provide new information aboutnthe possible effect of the programme in improving the cardiometabolicnhealth of overweight adults, making a more efficient use of an adult'snresources over time.nTrial registration: ClinicalTrials.gov ID: NCT02715063. Registered on 8nMarch 2016.