Abstract
INTRODUCTION: CrossFit utilizes both high-intensity aerobic training and resistance training using functional multi-joint movements such as squats, deadlifts, clean, snatch, and overhead press. There has been much debate over the safety, effectiveness and level of difficulty of CrossFit training for the general population. PURPOSE: This study aimed to compare perceived difficulties of an 8-week CrossFit or non-CrossFit exercise regimen. METHODS: The non-CrossFit exercise group (N=13) participated in three days of exercise consisting of mobility and functional movements, cardiovascular endurance training and a resistance training circuit each week for eight weeks. The CrossFit exercise group (N=13) integrated cardiovascular training into their resistance training program by completing a maximum number of repetitions in a given time period. Each week an online survey was sent to each participant to complete. Mean values were calculated for each question and a paired sample t-test was used to compare the responses between groups. RESULTS: Difficulty of the workouts was perceived as more difficult in the non-CrossFit group than the CrossFit group (3.22±0.56, 2.49±0.51, p<0.001, respectively). CrossFit participants rated level of soreness higher than the non-CrossFit group (2.36±0.37, p=0.002). The CrossFit group rated better sleep quality than the non-CrossFit group (2.23±0.17, p<0.001). DISCUSSION: A previous study found that perceived exertion and pain is more dependent on the load than the type of muscular contraction. The current study contradicted this finding as the CrossFit group used greater loads, but their perceived difficulty was less than the non-CrossFit group. The CrossFit group rated their perceived pain levels as higher than the non-CrossFit group, which supports previous research, and is possibly due to using greater loads. CONCLUSION: Based on the findings of this study and findings of previous research, use of greater loads may lead to greater perceived pain levels while flexibility and mobility training may lead to greater perceived difficulty.
Published Version
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