The purpose was to examine selected physiological responses of endurance-trained male wheelchair athletes in different Paralympic racing classes (T2, n = 3; T3, n = 8; T4, n = 7) during a 10-km treadmill time trial (TM:10-km). Peak oxygen uptake (V̇O2peak) was determined, and a TM:10-km was completed on a motorized treadmill. From this, % V̇O2peak utilized and the relationship between V̇O2peak and TM:10-km were established. During the TM:10-km, the following dependent variables were examined: propulsion speed, oxygen uptake, respiratory exchange ratio, and heart rate. The results showed athletes utilize a high % V̇O2peak (78.4 –13.6%) during the TM:10-km. There was a moderate correlation (r = -.57, p < .01) between VO2peak and TM:10-km. No physiological differences were found between the paraplegic racing classes (T3, T4), which suggests that there is some justification in amalgamating these racing classes for endurance events.
Ian G. Campbell is with the School of Health, Department of Sport, Health, and Exercise at Staffordshire University, Leek Road, Stoke-on-Trent ST4 2DF, United Kingdom. E-mail: <I.G.Campbell@Staffs.ac.uk.> Clyde Williams and Henryk K.A. Lakomy are with the Department of Physical Education, Sports Science, and Recreation Management at Loughborough University, Loughborough, Leicestershire, United Kingdom.