When comparing the responses of the two roups during the SR, it is evident that at each race stage V02 and HR were significantly higher in the paraplegics than the quadriplegics. This difference persisted even when these values were expressed as a percentage of the peak value (i.e. relative value) observed during the incremental velocity test. During the SR, quadriplegics maintained an intensity ranging from 72-82% of peak V02 or 82-92% of peak HR. In the paraplegics, these values were significantly higher, with values for the V02 and HR ranging from 90-98% and 91-100% respectively.