Comparison of Two Tests to Determine the Maximal Aerobic Speed

The aims of this study were (a): to compare maximal physiological responses (maximal heart rate: HRmax and blood lactate concentration: [La ]) and maximal aerobic speed (MAS) achieved during a gold standard test (T-VAM) to those during a new test entitled: the 150-50 Intermittent Test (150-50 ), and (b): to test the reliability of the 150-50 . Eighteen middle-distance runners performed, in a random order, the T-VAM and the 150-50 . Moreover, the runners performed a second 150-50 (retest). The results of this study showed that the MAS obtained during 150-50 were significantly higher than the MAS during the T-VAM (19.1 ± 0.9 vs. 17.9 ± 0.9 km.h , < 0.001). There was also significant higher values in HRmax (193 ± 4 vs. 191 ± 2 bpm, = 0.011), [La ] (11.4 ± 0.4 vs. 11.0 ± 0.5 mmol.L , = 0.039) during the 150-50 . Nevertheless, significant correlations were noted for MAS ( = 0.71, = 0.001) and HRmax ( = 0.63, = 0.007). MAS obtained during the first 150-50 and the retest were not significantly different ( = 0.76) and were significantly correlated ( = 0.94, < 0.001, intraclass correlation coefficient = 0.93 and coefficient of variation = 6.8 %). In conclusion, the 150-50 is highly reproducible, but the maximal physiological responses derived from both tests cannot be interchangeable in the design of training programs.