Octane's Q47 Series cross trainers are the only cross trainers to boast the even smarter SmartStride, the Q47 Series includes interactive ergonomics that monitors pace and direction and automatically changes stride length accordingly. Plus, now SmartStride individually fits every exerciser with size-based programming and the unique Hip Indexing Pivot (HIP) that measures your hip height and speed to optimize your strides and maximize muscle use throughout your workout. Combined with the patented Converging Path and MultiGrip handlebars that deliver superior upper-body comfort and training, these premium ellipticals perfectly accommodate everyone in your household and boldly surpass your greatest expectations.