Abstract

The aims of this study were two-fold: (1) to consider the criterion-related validity of the multi-stage fitness test (MSFT) by comparing the predicted maximal oxygen uptake ( VO2max) and distance travelled with peak oxygen uptake ( VO2peak) measured using a wheelchair ergometer (n = 24); and (2) to assess the reliability of the MSFT in a sub-sample of wheelchair athletes (n = 10) measured on two occasions. Twenty-four trained male wheelchair basketball players (mean age 29 years, s = 6) took part in the study. All participants performed a continuous incremental wheelchair ergometer test to volitional exhaustion to determine VO2peak, and the MSFT on an indoor wooden basketball court. Mean ergometer VO2peak was 2.66 litres * min-1 (s = 0.49) and peak heart rate was 188 beats * min-1 (s = 10). The group mean MSFT distance travelled was 2056 m (s = 272) and mean peak heart rate was 186 beats * min-1 (s = 11). Low to moderate correlations (r = 0.39 to 0.58; 95% confidence interval [CI]: 70.02 to 0.69 and 0.23 to 0.80) were found between distance travelled in the MSFT and different expressions of wheelchair ergometer VO2peak. There was a mean bias of 71.9 beats * min-1 (95% CI: 75.9 to 2.0) and standard error of measurement of 6.6 beats * min-1 (95% CI: 5.4 to 8.8) between the ergometer and MSFT peak heart rates. A similar comparison of ergometer and predicted MSFT VO2peak values revealed a large mean systematic bias of 15.3 ml * kg-1 * min-1 (95% CI: 13.2 to 17.4) and standard error of measurement of 3.5 ml * kg-1 * min-1 (95% CI: 2.8 to 4.6). Small standard errors of measurement for MSFT distance travelled (86 m; 95% CI: 59 to 157) and MSFT peak heart rate (2.4 beats * min-1 ; 95% CI: 1.7 to 4.5) suggest that these variables can be measured reliably. The results suggest that the multi-stage fitness test provides reliable data with this population, but does not fully reflect the aerobic capacity of wheelchair athletes directly. Verf.-Referat