Specific tackling situations affect the biomechanical demands experienced by rugby union players

Elena Seminati, Dario Cazzola, Ezio Preatoni, Grant Trewartha
2016 Sports Biomechanics  
37 Tackling in Rugby Union is an open skill which can involve high-speed collisions and is the 38 match event associated with the greatest proportion of injuries. This study aimed to analyse 39 the biomechanics of rugby tackling under three conditions: from a stationary position, with 40 dominant and non-dominant shoulder, and moving forward, with dominant shoulder. A 41 specially devised contact simulator, a 50 kg punch bag instrumented with pressure sensors, 42 was translated towards the
more » ... ed towards the tackler (n=15) to evaluate the effect of laterality and tackling 43 approach on the external loads absorbed by the tackler, on head and trunk motion, and on 44 trunk muscle activities. Peak impact force was substantially higher in the stationary dominant 45 (2.84 ± 0.74 kN) than in the stationary non-dominant condition (2.44 ± 0.64 kN), but lower 46 than in the moving condition (3.40 ± 0.86 kN). Muscle activation started on average 300 ms 47 before impact, with higher activation for impact-side trapezius and non-impact side erector 48 spinae and gluteus maximus muscles. Players' technique for non-dominant side tackles was 49 less compliant with current coaching recommendations in terms of cervical motion (more 50 neck flexion and lateral bending in the stationary non-dominant condition) and players could 51 benefit from specific coaching focus on non-dominant side tackles. 52 53 World count: 200 54 55
doi:10.1080/14763141.2016.1194453 pmid:27398838 fatcat:hvstt5mmabcx5p7oa6pu3wpu5i