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7th EFSMA – European Congress of Sports Medicine, 3rd Central European Congress of Physical Medicine and Rehabilitation, Annual Assembly of the German and the Austrian Society of Physical Medicine and Rehabilitation

Austrian Society of Physical Medicine and Rehabilitation

26.-29.10.2011, Salzburg, Austria

Lower body muscle imbalance in rugby players

Meeting Abstract

  • corresponding author Alexandra Mihaela Rusu - Victor Babes University of Medicine and Pharmacy, Timisoara, Romania
  • author Claudiu Avram - Department of Physical Education and Sport, West University of Timisoara, Timisoara, Romania
  • author Andreea Cocaina - Department of Physical Education and Sport, West University of Timisoara, Timisoara, Romania
  • author Iasmina Egri - Department of Physical Education and Sport, West University of Timisoara, Timisoara, Romania
  • author Ornela Olivia Cluci - Victor Babes University of Medicine and Pharmacy, Timisoara, Romania
  • author Bogdan Guta-Almajan - Department of Physical Education and Sport, Politehnica University, Timisoara, Timisoara, Romania
  • author Paul Miron - Department of Physical Education and Sport, West University of Timisoara, Timisoara, Romania

7th EFSMA – European Congress of Sports Medicine, 3rd Central European Congress of Physical Medicine and Rehabilitation. Salzburg, 26.-29.10.2011. Düsseldorf: German Medical Science GMS Publishing House; 2011. Doc11esm196

DOI: 10.3205/11esm196, URN: urn:nbn:de:0183-11esm1965

Published: October 24, 2011

© 2011 Rusu et al.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by-nc-nd/3.0/deed.en). You are free: to Share – to copy, distribute and transmit the work, provided the original author and source are credited.


Outline

Text

Introduction: Rugby involves all aspects of physical fitness including but not restricted to, balance, coordination, flexibility, aerobic and anaerobic endurance, reaction speed, strength and power [1], [2].

Considering the multitude of skills required by the rugby players, it is very important that training be based on relevant functional tests for this sport.

In order to increase the leg stability and performance, but also to decrease the number of sports injuries it is useful to investigate imbalances between left and right legs of the rugby players [3].

Objective: The study is aiming to demonstrate the importance of proper testing and adaptation of training according to the test results in order to increase physical performance and decrease the risk of injury.

Material/Methods: A total of 22 rugby players, underwent measurements of explosive force (Counter movement jump) evaluate using Myotest system and one leg explosive force (Squat jump) evaluate with Optojump system, before the start of a training camp and after two months of training. Exercise training comprised: strength training (once on 48 hours, 3-6 sets of 2-6 repetitions at 80-95% 1RM), aerobic training, completed by field training. During the training period was considered the power differences between legs and was emphasized the strengthening of the weaker leg.

Results: The evaluation of sportsmen at the end of the study showed an statistically significant increase in explosive power of the lower limbs (from 39.41±6.998 W/kg to 46.36±8.399 W/kg, p=0.009), along with an increase in explosive force at the same level (from 21.59 N/kg±1.82 to25.75±3.25 N/kg (p=<0.001).

Regarding the differences in explosive power between legs, although we didn’t find statistical differences at baseline, we noticed a mean difference of 0.48 W/kg between right and left leg. After only 2 months of training the mean differences was reduced to 0.28 W/kg.

Conclusion: Two months of intensive exercise training, significantly increase explosive power and force of the lower limbs. Emphasizing the strength training of the weaker leg, we can adjust the muscles imbalance and decrease the risk of injury. Based on testing results, physical trainers should create personalized training programmes for adjusting muscular imbalance. In case of injury followed by important asymmetry, proper rehabilitation should be performed before starting the specific exercise training.


References

1.
Gabbett TJ. Training Injuries in Rugby League: An Evaluation of skill-based Conditioning Games. Journal of Strength & Conditioning Research. 2002;16(2):236-41.
2.
Meir R, Colla P, Milligan C. Impact of the 10-meter rule change on professional rugby leagure: implications for training. Strength and Conditioning Journal. 2001;23(6):42-4.
3.
Aagaard P, Simonsen EB, Magnusson SP, Larsson B, Dyhre-Poulsen P. A new concept for isokinetic hamstring: quadriceps muscle strength ratio. American Journal of Sports Medicine. 1998;26:231-7.
4.
Croisier JL, Ganteaume S, Binet P, Genty M, Ferret JM. Strength Imbalances and Prevention of Hamstring Injury in Professional Soccer Players. Am J Sports Med. 2008;36:1469-75.