High-intensity compared to moderate-intensity training for exercise initiation, enjoyment, adherence, and intentions: an intervention study

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dc.contributor.author Heinrich, Katie M.
dc.contributor.author Patel, Pratik M.
dc.contributor.author O’Neal, Joshua L.
dc.contributor.author Heinrich, Bryan S.
dc.date.accessioned 2014-09-29T21:19:04Z
dc.date.available 2014-09-29T21:19:04Z
dc.date.issued 2014-09-29
dc.identifier.uri http://hdl.handle.net/2097/18353
dc.description.abstract Background: Understanding exercise participation for overweight and obese adults is critical for preventing comorbid conditions. Group-based high-intensity functional training (HIFT) provides time-efficient aerobic and resistance exercise at self-selected intensity levels which can increase adherence; behavioral responses to HIFT are unknown. This study examined effects of HIFT as compared to moderate-intensity aerobic and resistance training (ART) on exercise initiation, enjoyment, adherence, and intentions. Methods: A stratified, randomized two-group pre-test posttest intervention was conducted for eight weeks in 2012 with analysis in 2013. Participants (n = 23) were stratified by median age (< or ≥ 28) and body mass index (BMI; < or ≥ 30.5). Participants were physically inactive with an average BMI of 31.1 ± 3.5 kg/m2, body fat percentage of 42.0 ± 7.4%, weight of 89.5 ± 14.2 kg, and ages 26.8 ± 5.9 years. Most participants were white, college educated, female, and married/engaged. Both groups completed 3 training sessions per week. The ART group completed 50 minutes of moderate aerobic exercise each session and full-body resistance training on two sessions per week. The HIFT group completed 60-minute sessions of CrossFit™ with actual workouts ranging from 5–30 minutes. Participants completed baseline and posttest questionnaires indicating reasons for exercise initiation (baseline), exercise enjoyment, and exercise intentions (posttest). Adherence was defined as completing 90% of exercise sessions. Daily workout times were recorded. Results: Participants provided mostly intrinsic reasons for exercise initiation. Eighteen participants adhered (ART = 9, 81.8%; HIFT = 9, 75%). HIFT dropouts (p = .012) and ART participants (p = .009) reported lower baseline exercise enjoyment than HIFT participants, although ART participants improved enjoyment at posttest (p = .005). More HIFT participants planned to continue the same exercise than ART participants (p = .002). No significant changes in BMI or body composition were found. Workouts were shorter for HIFT than ART (p < .001). Conclusions: HIFT participants spent significantly less time exercising per week, yet were able to maintain exercise enjoyment and were more likely to intend to continue. High-intensity exercise options should be included in public health interventions. en_US
dc.language.iso en_US en_US
dc.relation.uri http://www.biomedcentral.com/1471-2458/14/789 en_US
dc.rights Attribution 2.0 Generic (CC BY 2.0) en_US
dc.rights.uri http://creativecommons.org/licenses/by/2.0/ en_US
dc.subject Exercise en_US
dc.subject High-intensity en_US
dc.subject Functional movements en_US
dc.subject Moderate-intensity en_US
dc.subject Overweight en_US
dc.subject Obese en_US
dc.subject CrossFit en_US
dc.subject Enjoyment en_US
dc.subject Adherence en_US
dc.subject Intentions en_US
dc.title High-intensity compared to moderate-intensity training for exercise initiation, enjoyment, adherence, and intentions: an intervention study en_US
dc.type Article (publisher version) en_US
dc.date.published 2014 en_US
dc.citation.doi 10.1186/1471-2458-14-789 en_US
dc.citation.jtitle BMC Public Health en_US
dc.citation.spage 789 en_US
dc.citation.volume 14 en_US
dc.contributor.authoreid kmhphd en_US
dc.contributor.authoreid bryanh73 en_US


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