Clinical trial NCT02185872: CrossFit Exercise to Improve Glucose Control for Overweight and Obese Adults
Official title: The Influence of a CrossFit Exercise Program on Glucose Control in Overweight and Obese Individuals
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Hyperglycemia
Keywords: Exercise
Physical Fitness
Body Composition, Beneficial
Lead sponsor: Kansas State University
Sponsor class: OTHER
First posted: 2014-07-10
Enrollment: 23
Sex: ALL
Minimum age (years): 18
Maximum age (years): 40
Standard ages: ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: TREATMENT

Brief summary: The purpose of this study was to examine the differences in glucose control, fitness, and body composition between a standard aerobic and resistance exercise training program and a shorter-duration, high-intensity CrossFit training program in overweight and obese physically inactive adults.

Hypotheses:

1. Both groups would improve glucose control, with the CrossFit group improving significantly more than the aerobic and resistance training group.
2. Both groups would improve fitness, with the CrossFit group improving significantly more than the aerobic and resistance training group.
3. Both groups would demonstrate decreases in body fat percentage and fat mass and increases in lean body mass, with the CrossFit group improving significantly more than the aerobic and resistance training group.

Detailed description: Overweight or obese participants will take part in an 8-week exercise intervention after clearance from a doctor, that is expected to improve glucose control, fitness (Eurofit and peak aerobic capacity), and body composition (body fat percentage, fat mass, and lean body mass). After stratification by age and body mass index, participants will be randomized to either a standard aerobic and resistance training exercise program or a relatively higher intensity, shorter duration CrossFit exercise program.

Eligibility criteria: Inclusion Criteria:

* body mass index (BMI) of 25 - \< 40, physically inactive (i.e., not participating in any structured exercise programs for the past 2 months and not exceeding 30 total minutes of physical activity per week)

Exclusion Criteria:

* current smoker, pregnant, taking blood glucose altering medications, heart disease, type 1 or 2 diabetes mellitus, total cholesterol 200 mg/dL or higher

Primary outcomes:
measure: Change from baseline in glucose control.
timeFrame: Baseline, Week 10
Secondary outcomes:
measure: Change from baseline in peak aerobic capacity
timeFrame: Baseline, Week 10
measure: Change from baseline in sit and reach
timeFrame: Baseline, Week 10
measure: Change from baseline in standing broad jump
timeFrame: Baseline, Week 10
measure: Change from baseline in vertical jump
timeFrame: Baseline, Week 10
measure: Change from baseline in pushups
timeFrame: Baseline, Week 10
measure: Change from baseline in situps
timeFrame: Baseline, Week 10
measure: Change from baseline in 40 meter dash
timeFrame: Baseline, Week 10
measure: Change from baseline in stork balance test
timeFrame: Baseline, Week 10
measure: Change from baseline in body composition
timeFrame: Baseline, Week 12
Other outcomes:
measure: Time spent completing daily workouts
timeFrame: 24 exercise sessions over 8 weeks
Locations:
city: Manhattan
country: United States
facility: Kansas State University
state: Kansas
Study officials:
affiliation: Kansas State University
name: Katie M Heinrich, PhD
role: PRINCIPAL_INVESTIGATOR
affiliation: Kansas State University
name: Pratik Patel, MS, RD
role: STUDY_DIRECTOR
References:
citation: Heinrich KM, Patel PM, O'Neal JL, Heinrich BS. High-intensity compared to moderate-intensity training for exercise initiation, enjoyment, adherence, and intentions: an intervention study. BMC Public Health. 2014 Aug 3;14:789. doi: 10.1186/1471-2458-14-789.