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%
* Significant differences compared to the SRM device# significant Spearman correlation coefficient; (p < 0.05).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