Study titled “High-intensity compared to moderate-intensity training for exercise initiation, enjoyment, adherence, and intentions: an intervention study” deals with Crossfit and enjoyment. Click to read the full study: High-intensity compared to moderate-intensity training for exercise initiation, enjoyment, adherence, and intentions: an intervention study
High-intensity compared to moderate-intensity training for exercise initiation, enjoyment, adherence, and intentions: an intervention study
AbstractBackground:Understanding exercise participation for overweight and obese adults is critical for preventingcomorbid conditions. Group-based high-intensity functional training (HIFT) provides time-efficient aerobic andresistance exercise at self-selected intensity levels which can increase adherence; behavioral responses to HIFT areunknown. 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 2012with 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 completed50 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 exercisesessions. 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 exerciseenjoyment than HIFT participants, although ART participants improved enjoyment at posttest (p = .005). More HIFTparticipants planned to continue the same exercise than ART participants (p = .002). No significant changes in BMIor 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 exerciseenjoyment and were more likely to intend to continue. High-intensity exercise options should be included in publichealth interventions.
Keywords:Exercise, High-intensity, Functional movements, Moderate-intensity, Overweight, Obese, CrossFit,Enjoyment, Adherence, Intentions