Table 3

Tackler front-on proficiency results: injury versus non-injury (includes means±SD, % score for total number of events for which criteria score was satisfied, p values and effect sizes with interpretations)

I (n=11)Per centNI (n=54)Per centp ValueEffect sizeInterpretation
Precontact
 Identify/track ball-carrier onto shoulder0.73±0.47730.70±0.46700.880.07Trivial
 Body position—upright-to-low (dipping)0.55±0.52550.54±0.50540.960.02Trivial
 Straight back, centre of gravity forward of support base0.73±0.47730.83±0.38830.420.23Small
 Square to ball-carrier0.73±0.47730.87±0.34870.240.34Small
 Boxer stance (elbows close, hands up)0.18±0.40180.04±0.1940.070.45Small
 Head up and forward/face up1.00±0.001000.98±0.14980.660.20Small
 Shortening steps0.55±0.52550.94±0.2394<0.01*0.97Moderate
 Approach from front/oblique0.91±0.30911.00±0.001000.03*0.42Small
Overall precontact0.67±0.25670.74±0.32740.660.24Small
Contact
 Explosiveness on contact0.18±0.40180.31±0.47310.390.30Small
 Contact with shoulder opposite leading0.09±0.3090.06±0.2360.660.11Trivial
 Contact in centre of gravity0.36±0.50360.54±0.50540.300.36Small
 Head placement on correct side of ball-carrier0.55±0.52550.80±0.41800.080.53Small
Overall contact0.30±0.200.43±0.32430.510.49Small
Postcontact
 Shoulder usage (drive into contact)0.00±0.0000.20±0.41200.100.69Moderate
 Arm usage (punch forward and wrap, ie, hit-and-stick)0.36±0.50500.70±0.46700.03*0.71Moderate
 Leg drive on contact0.09±0.30300.30±0.46300.160.54Small
 Release ball-carrier and compete for possession0.00±0.0000.54±0.5054<0.01*1.53Large
Overall postcontact0.11±0.170.44±0.23440.061.63Large
Total7.00±1.95449.35±2.5658<0.01*1.03Moderate
  • *Statistical significance (p<0.05).

  • I, injury; NI, non-injury.