Table 2. Heart rate responses and cardiovascular load variability during 3v3 and 5v5 small-sided games. Format HRmean Bout 1 (bpm) HRmean Bout 2 (bpm) HRmean Bout 3 (bpm) HRmean Bout 4 (bpm) HRmean overall (bpm) CV% (mean ± SD) 3v3 178.85 ± 2.88 180.88 ± 3.02 181.58 ± 2.88 182.17 ± 3.33 180.87 ± 2.79 1.97 ± 0.81 5v5 170.57 ± 3.54 173.15 ± 3.87 174.93 ± 3.69 175.68 ± 3.82 173.58 ± 3.56 2.61 ± 1.21 p-value <0.001 <0.001 <0.001 <0.001 <0.001 0.002 HR: heart rate; CV: coefficient of v