Table 2. Concurrent validity of the Polar V800 sports watch, force platform and high-speed camera.
|
Systematic Bias (cm) |
Random Error (cm) |
Proportional Bias |
ICC (95% CI) |
| FP vs. Polar V800, SJ |
-0.30 |
2.36 |
No |
0.93 (0.88-0.96) |
| HSC/KS vs. Polar V800, SJ |
0.69 |
2.70 |
No |
0.90 (0.83-0.94) |
| FP vs. HSC/KS, SJ |
-0.79 |
3.07 |
No |
0.88 (0.79-0.93) |
| FP vs. Polar V800, CMJ |
-0.45 |
1.85 |
No |
0.97 (0.94-0.98) |
| HSC/KS vs. Polar V800, CMJ |
0.97* |
2.60 |
No |
0.93 (0.88-0.96) |
| FP vs. HSC/KS, CMJ |
-1.30* |
2.19 |
No |
0.96 (0.92-0.98) |
CI: confidence interval; CMJ: countermovement jump; FP = force platform; HSC/KS = high-speed camera/Kinovea system; ICC = intraclass correlation coefficient; SJ: squat jump.
*Significant differences among devices, p ≤ 0.01.
