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The SISM Blog

Preventing Hamstring Injuries at The SISM Clinic

By SISM Clinic | In Blog | on July 18, 2015

Hamstring Injuries in the GAA

The hamstring muscle group consists of three muscles; Biceps Femoris, semimembranosus and semitendinosus. The majority of hamstring injuries occur in the biceps femoris muscle, they are usually a non-contact injury and mainly occur during sprinting and kicking. Kerry v Limerick - GAA Football All-Ireland Senior Championship Quarter-Final

Injuries are common place in Gaelic football and the most recent research by Murphy et al. (2012) analysed the incidence of injury in Gaelic football from the 2007 playing season through to the end of the 2010 playing season. A total of 851 Gaelic football players were included who were all playing at the highest level of inter-county football. Each team’s specific injury, training and match day data were submitted each week by a team of physiotherapists through a web portal. Over the four-year period there were a total of 1,014 injuries reported, with muscle injuries representing the highest incidence at 42.6% of all injuries (431.9 injuries), 243.3 of which were hamstring injuries making it the most common injury overall in the four-year study. In the GAA there is an average of 7.5 hamstring injuries per club per season while in the AFL and soccer there is an average of five which has been decreasing over the past 10 years. 

Again Murphy et al. (2014) explored specific injury occurrence in the national GAA database which finds hamstring injuries once again to be the most prolific injury within the GAA. 

“After numerous hamstring injuries over a six-month period, I contacted Martin at The SISM Limerick v Offaly - Allianz Hurling League Division 1B Round 4Clinic. I was tested on the isokinetic machine to assess any muscular imbalances and straight away this pointed to a weakness in my hamstrings. After numerous isokinetic sessions and specific strengthening exercises, I was back fit again. In the past, weeks of conventional rehab has not worked for me but I found the isokinetic sessions to be a lot more demanding and beneficial.”          

Jason Gibbons (Ballintubber GAA)

Hamstring injuries accounted for 25% of all injuries in the 2014 playing season with a total of 84 injuries, 61 of which were new injuries and 17 being recurrent in less than one year. The results obtained in 2014 were slightly higher than in the four-year study between 2007 and 2010 and have a much higher hamstring reoccurrence rate which is a growing problem in the GAA. This is a particular thorn in the side of GAA players but how can we prevent this?

“Earlier this season I suffered a hamstring injury that I was struggling to shake off. After being assessed by the lads in The SISM Clinic they identified a few problems that were leading to this persistent injury. I was given a rehab programme which included a number of sessions on the isokinetic machine. Isokinetics was new to me and to say I was impressed with the results would be an understatement. I have undergone hamstring rehab before but nothing like this. The strength it builds in the hamstring and the speed at which it works were remarkable.”

Ronan McNamara (Davitts GAA)

Hamstring Injury Prevention – Isokinetics and the Single Leg Bridge Test

Here at The SISM Clinic we have conducted our own research into hamstring injury prevention. Isokinetics has been widely used to assess hamstring strength in Gaelic footballers(Mackey et al. 2011)whilst the single leg bridge test (SLBT) has been used in the AFL (Freckelton et al. 2013). 

“I found the isokinetics in The SISM Clinic excellent. I’ve had hamstring trouble for the last few years and the lads were able to identify where my weakness was in percentage from left leg to right leg. They made a plan to strengthen the hamstrings so that both legs were 100%. I also undertook a program that would help to reduce further hamstring injuries.”

Alan Loftus (Knockmore GAA)

We have studied twenty one elite Gaelic footballers (age 20 ±1.05, standing height 180.66 ± mm, body mass 80.66 ±7.9 kg) were assessed. Any players who had a hamstring injury in the previous six weeks were excluded from the study. The SLBT was performed on both legs, patients had to perform as many repetitions until fatigue. Concentric hamstring and quadriceps peak torque at 60, 180 and 240 degrees/second (/s) were recorded using an isokinetic dynamometer (Biodex System 3).  SLBT correlated with Isokinetics peak torque @ 60/60 (°/s) (r=1), 180/180 (°/s) (r =.791) and 240/240 (°/s) (r =.567).


From this research we have developed specific hamstring prevention programs which involve isokinetics and individualised strength work for injury prevention.

“Isokinetics helped to speed up my recovery a lot quicker than just the normal hamstring rehab. After undergoing a test I was able to see how much weaker my left hamstring was, I knew exactly andy moran isokineticshow much strengthening was required and I felt a lot stronger when returning to play.”

James Shaughnessy (Claremorris GAA)


1. Murphy, J., O’Malley, E., Gissane, C., Blake, C. (2012). Incidence of injury in Gaelic football. The American Journal of sports medicine. 1 (1), p2113-2120.

2. Mackey C., O’Sullivan K., O’Connor A., Clifford A. (2011).  Altered hamstring strength profile in Gaelic footballers with a previous hamstring injury. Isokinetic and Exercise Science. 19 (1), p47-54.

3. Freckleton, G., Cook, J., Pizzari, T. (2013). The predictive validity of a single leg bridge test for hamstring injuries in Australian Rules football players. BJ Sports Med. 48 (1), p713-717.

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