Table 1.
Population characteristics and performance values of the high‐speed treadmill‐standardized exercise test (HSET); a one‐way anova test was performed for parametric values
| Group H (n = 13) | Group A (n = 30) | Group O (n = 11) | P‐value | |
|---|---|---|---|---|
| Age (y) | 10 ± 4 | 11 ± 5 | 9 ± 5 | 0.56 |
| Sex | 8 mc | 22 mc | 7 mc | nt |
| 5 f | 8 f | 3 f | ||
| 0 m | 0 m | 1 m | ||
| Breed | 12 Warmbloods | 26 Warmbloods | 7 Warmbloods | nt |
| 1 Thoroughbred | 1 Thoroughbred | 2 Thoroughbreds | ||
| 0 Other | 3 Other | 2 Other | ||
| Completed test steps | 6 (5, 7) | 5 (5, 7) | 6 (5, 7) | 0.38 |
| Performance values (n = 51) | (n = 13) | (n = 27) | (n = 11) | |
| V150 (m/s) | 5.2 ± 0.7 | 5.2 ± 0.9 | 5.1 ± 0.9 | 0.93 |
| V200 (m/s) | 8.6 (6.6, 9.8) | 8.5 (6.6, 11.4) | 8.4 (7.3, 10.9) | 0.68 |
| V2 (m/s) | 6.3 ± 1.1 | 6.0 ± 1.1 | 5.9 ± 0.9 | 0.63 |
| V4 (m/s) | 7.3 (6.2, 10.0) | 7.4 (4.9, 9.3) | 6.7 (6.1, 9.6) | 0.66 |
| HR2 (/min) | 168 (130, 182) | 165 (135, 190) | 165 (152, 176) | 0.50 |
| HR4 (/min) | 183 ± 15 | 181 ± 13 | 180 ± 9 | 0.79 |
| Peak lactate (mmol/L) | 7.2 ± 2.3 | 8.0 ± 2.1 | 8.7 ± 2.1 | 0.28 |
| Peak velocity (m/s) | 8 (7.3, 9.7) | 8 (5, 10) | 8 (7.5, 11) | 0.83 |
| Max instantaneous HR (/min) | 201 (185, 222) | 208 (181, 345) | 203 (189, 217) | 0.43 |
Abbreviations: ANOVA, analysis of variance; f, female; Group A, arrhythmia; Group H, healthy; Group O, other; HR, heart rate; HR2, HR at [lactate]b of 2 mmol/L; HR4, HR at [lactate]b of 4 mmol/L; m, male; Max instantaneous HR, the highest measured instantaneous heart rate; mc, male‐castrated; nt, not tested; V2, velocity at [lactate]b of 2 mmol/L; V4, velocity at [lactate]b of 4 mmol/L; V150, velocity at HR 150/min; V200, velocity at HR 200/min.
Nonparametric values were analyzed using a Kruskal‐Wallis test. Level of significance was set at P < .05. Values are reported as mean ± standard deviation or as median (minimum, maximum).