Table 3. Correlation matrix (r-values and 95% confidence intervals) between RPE and the other training load variables and aerobic capacity across different drills.

Measure	RPE 10x5 positional game	RPE 3v3	RPE 6v6	RPE 9v9	RPE 11v11	RPE RST	RPE muscular endurance	RPE slalom
VIFT (km/h)	0.260 ([-0.036,0.509]), p = 0.081	0.363* ([0.077,0.583]), p = 0.013	0.106 ([-0.191,0.384]), p = 0.483	-0.585* ([-0.745,-0.349]), p < 0.001	-0.446* ([-0.649,-0.174]), p = 0.002	0.017 ([-0.275,0.306]), p = 0.909	-0.027 ([-0.315,0.265]), p = 0.857	0.039 ([-0.254,0.326]), p = 0.795
HRaverage (bpm)	0.244 ([-0.052,0.497]), p = 0.102	0.977* ([0.957,0.987]), p < 0.001	0.975* ([0.959,0.984]), p < 0.001	0.707* ([0.518,0.825]), p < 0.001	0.435* ([0.161,0.641]), p = 0.003	0.599* ([0.368,0.755]), p < 0.001	0.968* ([0.941,0.982]), p < 0.001	0.951* ([0.910,0.972]), p < 0.001
HRmax (bpm)	0.260 ([-0.036,0.509]), p = 0.081	0.778* ([0.624,0.869]), p < 0.001	0.880* ([0.789,0.931]), p < 0.001	0.450* ([0.179,0.652]), p = 0.002	0.066 ([-0.229,0.349]), p = 0.662	0.592* ([0.359,0.750]), p < 0.001	0.954* ([0.916,0.974]), p < 0.001	0.872* ([0.775,0.926]), p < 0.001
Distance/minute (m/min)	-0.196 ([-0.458,0.102]), p = 0.192	0.686* ([0.488,0.811]), p < 0.001	0.740* ([0.568,0.846]), p < 0.001	-0.305* ([-0.545,-0.013]), p = 0.039	-0.148 ([-0.419,0.150]), p = 0.325	0.231 ([-0.066,0.487]), p = 0.122	-0.060 ([-0.344,0.235]), p = 0.692	0.634* ([0.415,0.778]), p < 0.001
Average speed (km/h)	0.180 ([-0.104,0.445]), p = 0.231	0.698* ([0.504,0.820]), p < 0.001	0.737* ([0.562,0.844]), p < 0.001	-0.197 ([-0.459,0.102]), p = 0.190	-0.200 ([-0.462,0.098]), p = 0.183	0.051 ([-0.244,0.335]), p = 0.738	0.032 ([-0.261,0.319]), p = 0.834	0.598* ([0.366,0.754]), p < 0.001
Distance between 15.0-18.99 km/h (m/min)	0.173 ([-0.119,0.439]), p = 0.251	0.830* ([0.706,0.911]), p < 0.001	0.675* ([0.472,0.804]), p < 0.001	0.100 ([-0.197,0.380]), p = 0.510	-0.140 ([-0.412,0.158]), p = 0.354	0.582* ([0.347,0.744]), p < 0.001	0.116 ([-0.182,0.392]), p = 0.443	0.533* ([0.282,0.710]), p < 0.001
Distance between >19.00 km/h (m/min)	0.147 ([-0.151,0.418]), p = 0.330	0.710* ([0.523,0.827]), p < 0.001	0.406* ([0.127,0.620]), p = 0.005	0.086 ([-0.211,0.366]), p = 0.571	-0.141 ([-0.413,0.157]), p = 0.349	0.583* ([0.347,0.744]), p < 0.001	Not possible calculate	-0.138 ([-0.411,0.160]), p = 0.360

VIFT: final velocity at 30-15 intermittent fitness test; HR: heart rate; RPE: rate of perceived exertion; RST: repeated sprint training*: significant correlation (p < 0.05).