Table 1. Descriptive statistics and test-retest reliability of sprint F-V variables measured by the drone and radar systems.
| Variables |
Device |
Mean ±
SD
(n = 17) |
ICC (95%
CI) |
CV% (95%
CI) |
SEM |
SWC |
MDC95 |
Interpretation |
| Tau
(s) |
Drone |
1.14 ±
0.11 |
0.75 (0.44
to 0.90) |
4.69 (3.06
to 6.32) |
0.05 |
0.02 |
0.15 |
Good |
| Radar |
1.10
± 0.08 |
0.77 (0.48
to 0.91) |
3.37 (2.20
to 4.53) |
0.04 |
0.02 |
0.10 |
Good |
| Amax
(m·s-2) |
Drone |
7.59 ±
0.46 |
0.61 (0.20
to 0.84) |
3.84 (2.51
to 5.17) |
0.29 |
0.08 |
0.81 |
Moderate |
| Radar |
7.76 ±
0.40 |
0.73 (0.41
to 0.90) |
2.67 (1.75
to 3.60) |
0.21 |
0.08 |
0.58 |
Moderate |
| Vmax
(m·s-1) |
Drone |
8.70 ±
0.45 |
0.94 (0.85
to 0.98) |
1.25 (0.95
to 1.46) |
0.11 |
0.09 |
0.30 |
Excellent |
| Radar |
8.62 ±
0.41 |
0.96 (0.89
to 0.98) |
1.00 (0.65
to 1.35) |
0.09 |
0.08 |
0.24 |
Excellent |
| V0
(m·s-1) |
Drone |
9.02 ±
0.51 |
0.94 (0.83
to 0.98) |
1.43 (1.09
to 1.66) |
0.13 |
0.10 |
0.36 |
Excellent |
| Radar |
8.92 ±
0.45 |
0.95 (0.88
to 0.98) |
1.12 (0.73
to 1.51) |
0.10 |
0.09 |
0.28 |
Excellent |
| F0
(N·kg-1) |
Drone |
7.57 ±
0.47 |
0.61 (0.20
to 0.84) |
3.91 (2.56
to 5.27) |
0.30 |
0.09 |
0.82 |
Moderate |
| Radar |
7.76 ±
0.40 |
0.73 (0.40
to 0.89) |
2.73 (1.79
to 3.68) |
0.21 |
0.08 |
0.59 |
Moderate |
| Pmax
(W·kg-1) |
Drone |
17.04 ±
1.17 |
0.79 (0.51
to 0.92) |
3.19 (2.31
to 3.74) |
0.54 |
0.23 |
1.51 |
Good |
| Radar |
17.31 ±
1.26 |
0.91 (0.77
to 0.97) |
2.23 (1.46
to 3.00) |
0.39 |
0.25 |
1.07 |
Excellent |
| RFmax
(%) |
Drone |
61.09 ±
2.37 |
0.63 (0.23
to 0.85) |
2.39 (1.56
to 3.22) |
1.46 |
0.44 |
4.05 |
Moderate |
| Radar |
61.99 ±
1.94 |
0.73 (0.39
to 0.89) |
1.66 (1.08
to 2.23) |
1.03 |
0.37 |
2.85 |
Moderate |
| SFV
(N·s·m-1·kg-1) |
Drone |
-0.84 ±
0.08 |
0.75 (0.43
to 0.90) |
4.88 (3.18
to 6.57) |
0.04 |
0.02 |
0.11 |
Good |
| Radar |
-0.87 ±
0.06 |
0.76 (0.45
to 0.91) |
3.56 (2.32
to 4.79) |
0.03 |
0.01 |
0.09 |
Good |
| T5m
(s) |
Drone |
1.38 ±
0.04 |
0.59 (0.17
to 0.83) |
1.64 (1.20
to 1.89) |
0.02 |
0.01 |
0.06 |
Moderate |
| Radar |
1.37 ±
0.03 |
0.81 (0.55
to 0.93) |
1.08 (0.76
to 1.31) |
0.02 |
0.01 |
0.04 |
Good |
| T10m
(s) |
Drone |
2.12 ±
0.05 |
0.70 (0.34
to 0.88) |
1.29 (0.95
to 1.48) |
0.03 |
0.01 |
0.08 |
Moderate |
| Radar |
2.11 ±
0.05 |
0.87 (0.67
to 0.95) |
0.87 (0.59
to 1.05) |
0.02 |
0.01 |
0.05 |
Good |
| T15m
(s) |
Drone |
2.78 ±
0.07 |
0.84 (0.62
to 0.94) |
0.94 (0.62
to 1.27) |
0.03 |
0.01 |
0.07 |
Good |
| Radar |
2.77 ±
0.07 |
0.93 (0.82
to 0.98) |
0.66 (0.43
to 0.89) |
0.02 |
0.01 |
0.05 |
Excellent |
| T20m
(s) |
Drone |
3.40 ±
0.08 |
0.87 (0.67
to 0.95) |
0.92 (0.60
to 1.24) |
0.03 |
0.02 |
0.09 |
Good |
| Radar |
3.39 ±
0.09 |
0.94 (0.85
to 0.98) |
0.64 (0.42
to 0.86) |
0.02 |
0.02 |
0.06 |
Excellent |
| A5m
(m·s-2) |
Drone |
4.42 ±
0.21 |
0.71 (0.37
to 0.89) |
2.52 (1.86
to 2.91) |
0.11 |
0.04 |
0.31 |
Moderate |
| Radar |
4.48 ±
0.22 |
0.88 (0.70
to 0.96) |
1.68 (1.10
to 2.26) |
0.08 |
0.04 |
0.21 |
Good |
| A10m
(m·s-2) |
Drone |
3.47 ±
0.17 |
0.85 (0.63
to 0.94) |
1.90 (1.24
to 2.56) |
0.07 |
0.03 |
0.18 |
Good |
| Radar |
3.49 ±
0.18 |
0.94 (0.84
to 0.98) |
1.29 (0.84
to 1.74) |
0.05 |
0.04 |
0.13 |
Excellent |
| A15m
(m·s-2) |
Drone |
2.86 ±
0.16 |
0.93 (0.82
to 0.97) |
1.47 (0.96
to 1.98) |
0.04 |
0.03 |
0.12 |
Excellent |
| Radar |
2.87 ±
0.17 |
0.97 (0.91
to 0.99) |
1.09 (0.71
to 1.47) |
0.03 |
0.03 |
0.09 |
Excellent |
| A20m
(m·s-2) |
Drone |
2.44 ±
0.15 |
0.95 (0.86
to 0.98) |
1.39 (0.91
to 1.88) |
0.03 |
0.03 |
0.09 |
Excellent |
| Radar |
2.44 ±
0.15 |
0.97 (0.92
to 0.99) |
1.11 (0.72
to 1.49) |
0.03 |
0.03 |
0.08 |
Excellent |
ICC (95% CI) = intraclass correlation coefficient with 95% confidence interval; CV% (95% CI) = coefficient of variation with 95% confidence interval; SEM = standard error of measurement; SWC = smallest worthwhile change; MDC
95 = minimal detectable change at the 95% confidence level.
