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Introduction: Though TRX suspension training and CrossFit are similar methods of functional training, until now the differences in the effects on body composition and motor skills are not known. Methods: A sample of CrossFitters and TRXers was enrolled and evaluated at the beginning of the study and after 6 months. body mass index (BMI), waist-to-height-ratio (WHtR), body fat percentage, Sargent test and Balke test were used for the evaluation of the two groups.Results: Fat percentage, WHtR showed a significant improvement over time, without statistical significant differences between the two groups. No statistical differences were found between groups for aerobic capacity, even if both present an improvement for all parameters during time (p<0.05). The study revels also a greater increase for VO2max values in CrossFit group instead of TRX group, confirmed by the fact that changes in the