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Clinical Trial Summary

Overweight and obesity are a public health problem for society, reflected by an increase in its prevalence worldwide, being more frequent in women and related to low levels of self-esteem, accumulation of subcutaneous fat and internal organs, reduction of muscle mass (MM) and basal metabolic rate (BMR). Women are more predisposed to present weight gain because they are metabolically less efficient, have greater food intake, greater physical inactivity, and genetic factors. The different methods of physical training used for weight control are continuous training (CT) and the high-intensity interval training (HIIT). Both CT and HIIT have shown benefits without finding superiority of any of these methods. Nevertheless, there is a trend to the use HIIT programs, since they are more time-efficient and supports their use to induce physiological and metabolic adaptations over time, since this is a barrier to adherence to exercise programs. Overweight and obesity causes individual alterations in body composition and exercise leads to increase in MM, increase in caloric expenditure during the training session and increase in BMR due to the onset of muscle growth, secondary to an increase in the activity of the mitochondrial enzymes (greater mitochondrial biogenesis in the muscle), adaptations that could depend on the type of exercise, its intensity and the volume of it, but it is not clear due to the lack of evidence regarding this.

The primary objective of this study is to demonstrate that a HIIT program of short duration in a real-world setting has a standardized mean difference (SMD) higher than 0.84 in the improvement of self-esteem when comparing with a moderate-intensity continuous training (MICT) in women 18 to 44 years with overweight and obesity and low self-esteem, during eight weeks.

The secondary objective is to demonstrate that a low-volume HIIT in a real-world setting improves MM in 2% compared with MICT during a period of eight weeks in women 18 to 44 years.


Clinical Trial Description

Fifty women with low self-esteem will be randomly assigned to one of two training programs (MICT or HIIT) in a real-world setting. Both groups will perform three times a week for eight-weeks on alternate days.

The women in each group will perform three workouts per week for a period of eight weeks. The moderate-intensity continuous training group will perform a training session of 40 min duration at an intensity between 65 and 75% of your HRmax. Women assigned to the group HIIT will perform a training session of 22 minutes of duration by performing intervals of high intensity between 90 and 95 % of the HRmax for 30 seconds in duration and with a recovery of one minute training at moderate intensity is between 50 and 60 % of the HRmax, doing 15 loads of 30 seconds at high intensity, with 60 seconds of recovery between loads at moderate intensity. At the beginning of each training session, both groups will complete strength exercises mainly including large muscle groups (hip, knees, and ankles) with Theraband® (blue color ) for 3 sets of 15 repetitions.

All participants will be evaluated before initiating interventions and upon completion of the training program, after eight weeks, self-esteem will be assessed using the Rosenberg self-esteem scale, determination of anthropometric variables such as weight, height, waist circumference, arterial pressure, body composition by bioimpedance and the basal metabolic rate. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT03852043
Study type Interventional
Source Universidad de Antioquia
Contact
Status Completed
Phase N/A
Start date February 26, 2018
Completion date April 5, 2019

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