Abstract
Objective: To assess the effect of a tackling task replicating the force magnitudes and directions seen in a competitive game or training session, on a players shoulder joint position sense. Design: Repeated measures design. Setting: Field based. Participants: Nineteen, senior, male, semi-professional rugby union players. Main outcome measures: Two criterion angles of 45° and 20° off maximal range of shoulder external rotation in the 90° angle of abduction, were assessed for reproduction accuracy prior to, and following a field based tackling task against an opponent. A comparison between dominant and non-dominant side accuracy was also obtained. Results: Prior to the tackling task, joint positioning sense was poorer at the 45° criterion angle than for 20° off the athletes' maximal range angle. Following the tackling task, error scores were significantly increased from baseline measures at the outer-range criterion angle for both dominant and non-dominant sides. In contrast to previous research the detrimental effect of the task was also greater. In addition, there was a significant decrease in accuracy at the 45° criterion angle for the players' non-dominant side. Conclusions: This study found a significant decrease in accuracy of joint position sense following the tackling task. It also found this decrease to be greater than previous research findings. In contrast to previous studies that found no effect at the 45° criterion angle, this study found significant changes for the players' non-dominant side occurred at this angle. A possible explanation for this is that the sensory motor system is negatively affected by fatigue and consequently shoulder dynamic stability is reduced. This fatigue element explains the trend for increased injury frequency in the third quarter of the game and would provide a rationale for the inclusion of conditioning programmes that address fatigue resistance and motor co-ordination in the region
| Original language | English |
|---|---|
| Pages (from-to) | 176-180 |
| Journal | Physical Therapy in Sport |
| Volume | 15 |
| Issue number | 3 |
| Early online date | 5 Dec 2013 |
| DOIs | |
| Publication status | Published - Aug 2014 |
Bibliographical note
NOTICE: this is the author’s version of a work that was accepted for publication in PhysicalTherapy in Sport. Changes resulting from the publishing process, such as peer review,
editing, corrections, structural formatting, and other quality control mechanisms may not be
reflected in this document. Changes may have been made to this work since it was
submitted for publication. A definitive version was subsequently published in Physical
Therapy in Sport, [VOL 15, ISSUE 3, (2014)] DOI 10.1016/j.ptsp.2013.10.003
Keywords
- Joint positioning sense
- Rugby union
- Shoulder
- Tackling