High-intensity Interval Training for Obese Individuals
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|ClinicalTrials.gov Identifier: NCT04075799|
Recruitment Status : Not yet recruiting
First Posted : September 3, 2019
Last Update Posted : September 3, 2019
This proposal's objective is to investigate the effects of a high-intensity intermittent stair climbing program on insulin resistance in individuals with obesity and at risk of type 2 diabetes (T2D).
Obesity (defined as body mass index ≥ 30kg/m2) is a major risk factor for T2D. The connection between obesity and T2D involves the development of insulin resistance (IR). Exercise training is an effective non-pharmacological approach to prevent and treat IR. Despite the efficacy of exercise training on ameliorating IR, most individuals do not achieve the minimum recommended levels of physical activity and cite "lack of time" and difficulty in accessing exercise facilities as barriers to exercise. Proposed as a time-efficient alternative, high-intensity interval training (HIIT), which consists of short periods of high-intensity efforts alternated with brief periods of recovery, is an efficient strategy to improve IR. However, most HIIT protocols have been studied in laboratory-based settings requiring access to specialized equipment (i.e. treadmills, cycle ergometers) and are not practical for the general population. The use of high-intensity intermittent stair climbing may be a suitable exercise strategy from an accessibility perspective. With evidence to suggest improvements in IR following HIIT in individuals with obesity or T2D, the application of a similar approach using high-intensity intermittent stair climbing to directly assess changes in IR in a population at risk of T2D populations is warranted. Completion of this study will help elucidate if an easy to implement, time-efficient and low-cost exercise training program improves insulin resistance in individuals at risk of T2D.
|Condition or disease||Intervention/treatment||Phase|
|Obesity Insulin Resistance||Other: high-intensity interval training||Not Applicable|
|Study Type :||Interventional (Clinical Trial)|
|Estimated Enrollment :||20 participants|
|Intervention Model:||Single Group Assignment|
|Masking:||None (Open Label)|
|Official Title:||A HIIT to Improve Metabolic Health in Obese Adults With Insulin Resistance|
|Estimated Study Start Date :||September 1, 2019|
|Estimated Primary Completion Date :||May 31, 2020|
|Estimated Study Completion Date :||August 31, 2020|
8 weeks using stair climbing with a frequency of thrice a week. For the first week of the stair training exercise program subjects will meet at UNM's Teaching Education Building (Stair Case 2). The following 7 weeks subjects can perform the exercise program at a staircase most convenient to them and approved by the research team. The warm-up will consist of 2 minutes of ascending and descending the stairs at a comfortable pace. The high-intensity intermittent exercise will be comprised of 6-12 x 30-seconds bout of ascending at an all-effort. A 30- seconds walking recovery will occur between the exercise bouts. After the exercise session the subject will walk during a 2-minute cool down. Every session will last between 10 to 15 minutes. The number of bouts (6-12) will be increased progressively over the weeks.
Other: high-intensity interval training
The HIIT protocol consists of 8 weeks using stair climbing three times per week. The warm-up will consist of 2 minutes of ascending and descending the stairs at a comfortable pace. The high-intensity intermittent exercise will comprise 6-12 x 30-seconds bouts of ascending at an all-effort. A 30- seconds walking recovery will occur between the exercise bouts. Post-exercise the subject will walk during a 2-minute cool down. Every session will last between 10 to 15 minutes. The number of bouts (6-12) will be increased progressively over the weeks. The first (week 1) and final week (week 8) of the exercise program will be monitored by a trained exercise physiologist. During supervised visits, heart rate and rating of perceived exertion (OMNI scale) will be measured at the end of each bout and after active recovery. Subjects will have the option to request further monitoring if desired.
- Change in HOMA-IR concentration [ Time Frame: Before the 8-week intervention and 72-hours after last exercise session. ]homeostasis model assessment for insulin resistance (HOMA-IR)
- Change in Body Composition [ Time Frame: After a 10-hour fast and at least 72 hours before and after the training ]underwater weighing (UWW)
- Change in Maximal Oxygen Consumption [ Time Frame: After a 10-hour fast and at least 72 hours before and after the training ]maximal ramp graded test protocol on a treadmill
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04075799
|Contact: Fabiano Amorim, PhD||(505)email@example.com|
|Principal Investigator:||Fabiano Amorim, PhD||University of New Mexico|