CrossFit Exercise to Improve Glucose Control for Overweight and Obese Adults
NCT ID: NCT02185872
Last Updated: 2015-03-31
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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COMPLETED
NA
23 participants
INTERVENTIONAL
2012-02-29
2012-05-31
Brief Summary
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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
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Conditions
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Keywords
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Study Design
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RANDOMIZED
PARALLEL
TREATMENT
NONE
Study Groups
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Aerobic and Resistance Training
Participants completed 24 exercise sessions based on current guidelines. Aerobic exercise (50 min) was performed on machines every session and resistance training (20 min) was performed on machines two sessions per week. Aerobic intensity was prescribed at 40-50% of heart rate reserve (HRR) Weeks 1-4 and 50-60% HRR Weeks 5-8. Resistance training was supervised by an ACE certified personal trainer. One-repetition maximums (1-RM) were assessed Week 1 (i.e., seated bicep curl, military press, seated lat pulldown, seated leg extension, triceps pulldown, bench press, reverse leg curl, seated leg press). For Weeks 2-3 participants completed, 3 sets of 15 reps at 50% 1-RM; Weeks 4-5, 3 sets of 12 reps at 60% 1-RM; Weeks 6-7, 3 sets of 10 reps at 70% 1-RM; Week 8, 3 sets of 8 reps at 75% 1-RM. Three sets of 15 unweighted crunches were completed each day. One minute of rest was taken between each set and each exercise.
Aerobic and Resistance Training
The protocol was based upon current guidelines of 150 minutes moderate-intensity aerobic activity and 2 days of muscle strengthening per week.
High-intensity functional training
Participants completed a total of 24 sessions that were pre-programmed and led by a certified instructor (CrossFit Level 2), which lasted up to 60 minutes in duration. The first two class periods were structured as an introduction to common movements used in high-intensity functional training (HIFT; e.g., squats, deadlift, press, jerks, barbell, dumbbell, and medicine ball cleans, pullups, kettlebell swings, among others). No scheduled workouts were given on days 1 and 2. Beginning on day 3 each HIFT class consisted of 10-15 minutes of stretching and warmup, 10-20 minutes of instruction and practicing techniques and movements, and 5-30 minutes for the workout of the day, performed at vigorous intensity, relative to each person's ability and fitness level. All weights and movements were individually prescribed and recorded for each participant.
High-Intensity Functional Training
Participants were instructed to work as hard as they could while maintaining safe technique and proper form to achieve as many reps or rounds as possible in the prescribed time frame. As HIFT participants became accustomed to specific movements, less time was dedicated to practicing movements and technique.
Interventions
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High-Intensity Functional Training
Participants were instructed to work as hard as they could while maintaining safe technique and proper form to achieve as many reps or rounds as possible in the prescribed time frame. As HIFT participants became accustomed to specific movements, less time was dedicated to practicing movements and technique.
Aerobic and Resistance Training
The protocol was based upon current guidelines of 150 minutes moderate-intensity aerobic activity and 2 days of muscle strengthening per week.
Other Intervention Names
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Eligibility Criteria
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Inclusion Criteria
Exclusion Criteria
18 Years
40 Years
ALL
Yes
Sponsors
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Kansas State University
OTHER
Responsible Party
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Katie M. Heinrich
Assistant Professor
Principal Investigators
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Katie M Heinrich, PhD
Role: PRINCIPAL_INVESTIGATOR
Kansas State University
Pratik Patel, MS, RD
Role: STUDY_DIRECTOR
Kansas State University
Locations
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Kansas State University
Manhattan, Kansas, United States
Countries
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References
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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.
Other Identifiers
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#6058
Identifier Type: -
Identifier Source: org_study_id