Table 1.
Results from the validity and reliability analysis.
| POWER OUTPUT | CADENCE | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SRM (W) | PT P1 (W) | SEM (W) | Rho Spearman value | Bland Altman | SRM (rpm) | PT P1 (rpm) | ||||||||
| Mean ±SD | CV | Mean ±SD | CV | Bias (W) | SD Bias (W) | Mean ±SD | CV | Mean ±SD | CV | |||||
| 70 CAD | SITTING | 100 W | 99±6 | 5.6% | 97±4* | 4.2% | 0.7 | 0.989# | -2.4 | 4.8 LoA (-12.1 to 7.3) |
70.4±1.0 | 1.4% | 71.7±1.1 | 1.5% |
| 150 W | 150±5 | 3.4% | 148±5 | 3.0% | 0.8 | 70.7±0.9 | 1.3% | 70.7±1.0 | 1.5% | |||||
| 200 W | 200±5 | 2.4% | 198±4 | 2.1% | 0.7 | 70.6±1.1 | 1.5% | 70.9±1.1 | 1.5% | |||||
| 250 W | 251±5 | 2.0% | 248±5 | 1.9% | 0.8 | 70.7±1.0 | 1.4% | 70.8±1.0 | 1.3% | |||||
| 300 W | 303±5 | 1.5% | 300±5 | 1.6% | 0.8 | 70.4±0.9 | 1.3% | 70.9±0.9 | 1.3% | |||||
| 350 W | 356±4 | 1.2% | 352±5* | 1.4% | 0.9 | 70.0±1.0 | 1.5% | 70.6±1.0 | 1.5% | |||||
| 85 CAD | SITTING | 100 W | 101±6 | 5.9% | 96±6* | 5.7% | 1.0 | 0.987# | -5.3 | 6.1 LoA (-17.6 to 7.0) |
84.7±0.8 | 0.9% | 85.0±0.8 | 0.9% |
| 150 W | 149±6 | 4.0% | 145±5* | 3.7% | 0.9 | 84.7±0.8 | 0.9% | 84.8±0.8 | 0.9% | |||||
| 200 W | 201±6 | 2.7% | 196±5* | 2.7% | 0.9 | 84.8±0.9 | 1.1% | 85.0±0.9 | 1.1% | |||||
| 250 W | 252±5 | 1.9% | 246±5* | 2.2% | 0.9 | 84.8±1.1 | 1.3% | 85.0±1.1 | 1.8% | |||||
| 300 W | 303±6 | 1.8% | 298±6* | 2.0% | 1.1 | 84.9±1.2 | 1.4% | 85.1±1.2 | 1.4% | |||||
| 350 W | 355±5 | 1.5% | 349±6* | 1.7% | 1.0 | 84.9±1.0 | 1.2% | 85.1±1.0 | 1.7% | |||||
| 100 CAD | SITTING | 100 W | 96±8 | 8.6% | 91±7* | 7.2% | 1.1 | 0.999# | -7.3 | 7.9 LoA (-23.1 to 8.4) |
98.9±1.3 | 1.3% | 99.7±1.2 | 1.3% |
| 150 W | 145±7 | 4.9% | 139±5* | 3.9% | 0.9 | 98.9±1.4 | 1.4% | 99.2±1.5 | 1.5% | |||||
| 200 W | 197±8 | 4.1% | 191±7* | 3.7% | 1.2 | 99.6±1.2 | 1.2% | 99.1±1.2 | 1.3% | |||||
| 250 W | 248±7 | 2.9% | 241±7* | 2.8% | 1.2 | 99.6±1.3 | 1.3% | 99.7±1.3 | 1.3% | |||||
| 300 W | 298±7 | 2.4% | 291±7* | 2.4% | 1.2 | 99.5±1.5 | 1.6% | 99.8±1.6 | 1.6% | |||||
| 350 W | 352±5 | 1.9% | 342±8* | 2.3% | 1.3 | 99.8±1.9 | 1.9% | 99.7±1.9 | 1.9% | |||||
| FC | STAND | 250 W | 253±7 | 2.6% | 241±5* | 2.2% | 0.9 | 0.927# | -9.0 | 5.3 LoA (-19.7 to 1.7) |
75.9±6.1 | 8.0% | 74.9±11.0 | 14.7% |
| 350 W | 352±6 | 1.8% | 345±5* | 1.5% | 0.9 | 74.8±9.1 | 12.1% | 73.5±12.9 | 17.6% | |||||
| 450 W | 455±8 | 1.7% | 446±6* | 1.2% | 1.0 | 69.6±7.7 | 11.1% | 68.5±10.7 | 15.7% | |||||
| FC | SIT | 500 W | 499±9 | 1.8% | 492±11* | 2.2% | 1.9 | -7.0 | 3.5 LoA (-14.1 to 0.0) |
90.0±10.1 | 11.2% | 89.8±10.5 | 11.7% | |
STAND = Standing; SIT= Sitting; CAD = Cadence; FC = Free cadence; SD = Standard Deviation; CV = Coefficient of variation; rho Spearman = Spearman correlation coefficient; LoA = Limits of Agreement
* Significant differences compared to the SRM device
# significant Spearman correlation coefficient; (p < 0.05).