Table 4 Characteristics of collisions during match-play recorded by detection from microtechnology units by studies reporting mild, moderate, and heavy collisions
Study | Microtechnology provider (device) | Competition (season[s]) | Group (variable) | Positional group | Type of collision recorded | Frequency of collisions (n=) mean (±SD) | Relative frequency of collisions (n min−1=) mean (±SD) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mild | Moderate | Heavy | Total | Mild | Moderate | Heavy | Total | ||||||
Gabbett et al. [31] | Catapult (minimaxX) | NRL (2008–2009) |  | Hit-up forwards | Collisions | 2.0 (NR) | 20.0 (NR) | 15.0 (NR) | 37.0 (NR) | 0.06 (NR) | 0.56 (NR) | 0.41 (NR) | 1.02 (NR) |
| Â | Â | Â | Wide-running forwards | Collisions | 2.0 (NR) | 12.0 (NR) | 14.0 (NR) | 28.0 (NR) | 0.03 (NR) | 0.27 (NR) | 0.28 (NR) | 0.59 (NR) | |
| Â | Â | Â | Adjustables | Collisions | 1.0 (NR) | 14.0 (NR) | 15.0 (NR) | 30.0 (NR) | 0.02 (NR) | 0.21 (NR) | 0.23 (NR) | 0.45 (NR) | |
| Â | Â | Â | Outside backs | Collisions | 5.0 (NR) | 10.0 (NR) | 2.0 (NR) | 16.0 (NR) | 0.03 (NR) | 0.20 (NR) | 0.25 (NR) | 0.48 (NR) | |
Gabbett [23] | Catapult (minimaxX) | NRL (NR) | Â | Forwards | Collisions | 0.2 (0.50) | 10.1 (4.80) | 13.0 (4.3) | 23.3 (7.6) | 0.01 (0.01) | 0.20 (0.09) | 0.27 (0.08) | 0.47 (0.13) |
| Â | Â | Â | Adjustables | Collisions | 0.5 (0.8) | 6.5 (3.5) | 9.4 (4.5) | 16.4 (6.5) | 0.01 (0.01) | 0.09 (0.06) | 0.13 (0.06) | 0.23 (0.10) | |
| Â | Â | Â | Outside backs | Collisions | 0.2 (0.6) | 4.3 (2.8) | 11.9 (4.3) | 16.4 (6.1) | 0.01 (0.01) | 0.06 (0.04) | 0.15 (0.05) | 0.21 (0.07) | |
| Â | NYC (NR) | Â | Forwards | Collisions | 0.6 (0.8) | 7.4 (6.3) | 10.3 (4.7) | 18.3 (10.5) | 0.01 (0.01) | 0.13 (0.07) | 0.21 (0.08) | 0.35 (0.11) | |
| Â | Â | Â | Adjustables | Collisions | 0.3 (0.5) | 8.3 (6.1) | 10.7 (2.9) | 19.3 (6.7) | 0.01 (0.01) | 0.13 (0.11) | 0.15 (0.04) | 0.29 (0.14) | |
| Â | Â | Â | Outside backs | Collisions | NR | 6.0 (3.3) | 8.8 (8.2) | 14.8 (9.1) | NR | 0.08 (0.03) | 0.11 (0.10) | 0.19 (0.10) | |
Gabbett [47] | Catapult (minimaxX S4) | QCup (2012) | Â | Forwards | Collisions | NR | NR | NR | 44.0 (13.0) | NR | NR | NR | 0.77 (0.19) |
| Â | Â | Â | Adjustables | Collisions | NR | NR | NR | 29.0 (9.0) | NR | NR | NR | 0.35 (0.10) | |
| Â | Â | Â | Outside backs | Collisions | NR | NR | NR | 22.0 (8.0) | NR | NR | NR | 0.27 (0.10) | |
| Â | Â | Â | Hookers | Collisions | NR | NR | NR | 40.0 (13.0) | NR | NR | NR | 0.64 (0.16) | |
Gabbett [48] | Catapult (minimaxX S4) | QCup (2012) | Match-play | Team | Collisions | 4.6 (4.5) | 21.7 (10.5) | 6.5 (3.8) | 32.9 (13.7) | 0.06 (0.06) | 0.27 (0.13) | 0.08 (0.05) | 0.41 (0.17) |
| Â | Â | Ball-in-play | Team | Collisions | 4.6 (4.5) | 21.7 (10.5) | 6.5 (3.8) | 32.9 (13.7) | 0.09 (0.09) | 0.44 (0.21) | 0.13 (0.08) | 0.67 (0.28) | |
Gabbett et al. [24] | Catapult (minimaxX) | NRL (NR) | Match-play | Team | Collisions | 3.0 (2.3) | 19.0 (4.7) | 15.0 (2.3) | 37.0 (5.8) | 0.06 (0.02 ) | 0.34 (0.12) | 0.26 (0.06) | 0.68 (0.18) |
| Â | Â | Â | Hit-up forwards | Collisions | 4.0 (3.7) | 22.0 (11.0) | 16.0 (4.9) | 42.0 (15.9) | 0.09 (0.10) | 0.58 (0.21) | 0.43 (0.12) | 1.09 (0.32) | |
| Â | Â | Â | Wide-running forwards | Collisions | 4.0 (4.9) | 24.0 (9.8) | 17.0 (6.1) | 45.0 (17.1) | 0.07 (0.06) | 0.39 (0.15) | 0.29 (0.09) | 0.76 (0.18) | |
| Â | Â | Â | Adjustables | Collisions | 4.0 (4.1) | 19.0 (11.0) | 11.0 (6.9) | 34.0 (16.5) | 0.07 (0.07) | 0.33 (0.22) | 0.20 (0.10) | 0.58 (0.36) | |
| Â | Â | Â | Outside backs | Collisions | 2.0 (2.8) | 12.0 (5.5) | 14.0 (5.5) | 28.0 (12.4) | 0.03 (0.03) | 0.17 (0.08) | 0.20 (0.07) | 0.38 (0.15) | |
|  |  | Training—repeated high intensity efforts | Team | Collisions | 5.0 (6.8) | 20.0 (13.5) | 1.0 (1.7) | 26.0 (15.2) | 0.13 (0.12) | 0.54 (0.42) | 0.02 (0.05) | 0.69 (0.47) | |
|  |  | Training—games | Team | Collisions | 4.0 (4.5) | 5.0 (4.5) | 2.0 (2.2) | 13.0 (9.0) | 0.31 (0.27) | 0.38 (0.31) | 0.12 (0.13) | 0.81 (1.12) | |
|  |  | Training—skills | Team | Collisions | 8.0 (5.7) | 15.0 (5.7) | 3.0 (2.8) | 26.0 (11.3) | 0.10 (0.06) | 0.20 (0.06) | 0.04 (0.03) | 0.29 (0.06) | |
Gabbett and Seibold [52] | Catapult (minimaxX S4) | QCup (NR) | Â | Backs | Collisions | NR | NR | NR | 26.0 (5.0) | NR | NR | NR | 0.3 (0.1) |
| Â | Â | Â | Â | Forwards | Collisions | NR | NR | NR | 32 (8) | NR | NR | NR | 0.7 (0.2) |
Gabbett et al. [53] | Catapult (minimaxX) | NRL (NR) | Higher aerobic fitness | Team | Collisions | NR | NR | NR | 45.2 (13.4) | NR | NR | NR | 0.92 (0.34) |
| Â | Â | Lower aerobic fitness | Team | Collisions | NR | NR | NR | 34.5 (18.3) | NR | NR | NR | 0.63 (0.15) | |
Hulin et al. [35] | Catapult (Optimeye S5) | NRL (NR) | Â | Team | Collisions | NR | NR | NR | 47.5 (10.5) | NR | NR | NR | NR |
Hulin et al. [55] | Catapult (minimaxX S4) | NRL (2014) | Higher success | Hit-up forwards | Collisions | NR | NR | NR | NR | NR | NR | NR | 0.84 (0.27) |
| Â | Â | Â | Adjustables | Collisions | NR | NR | NR | NR | NR | NR | NR | 0.79 (0.25) | |
| Â | Â | Â | Outside backs | Collisions | NR | NR | NR | NR | NR | NR | NR | 0.36 (0.07) | |
| Â | Â | Lower success | Hit-up forwards | Collisions | NR | NR | NR | NR | NR | NR | NR | 0.69 (0.19) | |
| Â | Â | Â | Adjustables | Collisions | NR | NR | NR | NR | NR | NR | NR | 0.45 (0.31) | |
| Â | Â | Â | Outside backs | Collisions | NR | NR | NR | NR | NR | NR | NR | 0.32 (0.12) | |
Johnston et al. [56] | Catapult (minimaxX S4) | International Student Competition (NR) | Â | Team | Tackles | NR | NR | NR | 18.96* (4.97) | NR | NR | NR | 0.19* (0.03) |
Kempton et al. [58] | GPSports (SPI-Pro) | NRL (2010–2011) |  | Team | Tackles | NR | NR | NR | (NR) | NR | NR | NR | 0.6 (NR) |
| Â | Â | Â | Â | Â | Ball carries | NR | NR | NR | 10.3 (NR) | NR | NR | NR | 1.1 (NR) |
Kempton et al. [42] | GPSports (SPI-Pro X) | NRL (2012) | Lower success | Team | Collisions | NR | NR | NR | 22.2 (15.8) | NR | NR | NR | 0.4 (0.5) |
| Â | NRL (2014) | Higher success | Team | Collisions | NR | NR | NR | 18.6 (26.1) | NR | NR | NR | 0.3 (0.6) | |
Murray et al. [61] | Catapult (minimaxX) | NRL (NR) | Shorter recovery | Team | Collisions | NR | NR | NR | 43.0 (4.0) | NR | NR | NR | 0.7 (0.1) |
| Â | Â | Medium recovery | Team | Collisions | NR | NR | NR | 35.0 (2.0) | NR | NR | NR | 0.6 (0.1) | |
| Â | Â | Longer recovery | Team | Collisions | NR | NR | NR | 38.0 (4.0) | NR | NR | NR | 0.8 (0.1) | |
Varley et al .[16] | Catapult (minimaxX) | NRL (2009–2010) |  | Team | Collisions | 0.3 (0.6) | 7.5 (5.0) | 11.1 (4.2) | 18.9 (8.1) | 0.00 (0.00) | 0.13 (0.11) | 0.19 (0.10) | 0.33 (0.16) |
Weaving et al. [7] | Catapult (Optimeye S5) | SL (2017) | 1st half | Hit-up forwards | Collisions | NR | NR | NR | 9.7 (2.6) | NR | NR | NR | NR |
| Â | Â | Â | Adjustables | Collisions | NR | NR | NR | 5.5 (3.3) | NR | NR | NR | NR | |
| Â | Â | Â | Outside backs | Collisions | NR | NR | NR | 5.1 (2.6) | NR | NR | NR | NR | |
| Â | Â | Â | Fullback | Collisions | NR | NR | NR | 5.2 (3.0) | NR | NR | NR | NR | |
| Â | Â | Â | Wide-running forwards | Collisions | NR | NR | NR | 8.9 (2.7) | NR | NR | NR | NR | |
| Â | Â | 2nd half | Hit-up forwards | Collisions | NR | NR | NR | 9.1 (2.8) | NR | NR | NR | NR | |
| Â | Â | Â | Adjustables | Collisions | NR | NR | NR | 5.2 (3.2) | NR | NR | NR | NR | |
| Â | Â | Â | Outside backs | Collisions | NR | NR | NR | 4.9 (2.5) | NR | NR | NR | NR | |
| Â | Â | Â | Fullbacks | Collisions | NR | NR | NR | 5.7 (3.6) | NR | NR | NR | NR | |
| Â | Â | Â | Wide-running forwards | Collisions | NR | NR | NR | 8.2 (2.7) | NR | NR | NR | NR | |