Amstutz HC, et al. - A total of 661 individuals (806 hips) representing 77% of a consecutive series of patients treated with metal-on-metal hybrid hip resurfacing arthroplasty (HRA) were enrolled in a survey in order to ascertain the impact of particular groups of sporting activities on the survivorship free of aseptic failure of a large series of HRA. No correlation between any category of activity and a reduction in survivorship was found. For aseptic failure or wear, influence and hip cycle scores also failed to exhibit any relationship with revision. Hence, for individuals treated with well-designed and well-implanted HRA, return to sporting activities following surgery was concluded as safe.