136
· DOS Abstracts
Normative profiles for hip strength and flexibility in
elite footballers
Andrea Mosler, Kay Crossley, Kristian Thorborg, Adam Weir, Andreas Serner ,
Per Hölmich
Sports Groin Pain Center, Aspetar Orthopaedic and Sports Medicine Hospital,
Doha, Qatar; , University of Queensland; Sports Orthopedic Research Center
- Copenhagen, Arthroscopic Center Amager; Sports Groin Pain Center &
SORC-C, Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Qatar &
Arthroscopic Ceneter Amager
Background:
Normative profiles for hip/groin strength and flexibility have not
been established in footballers.
Purpose / Aim of Study:
The primary aim of this study was to determine
these normative profiles.
Materials and Methods:
345 males (18-40) years, playing professional foot-
ball in the Qatar Stars League were evaluated. Strength was measured using a
hand held dynamometer with an eccentric break test in side-lying for hip ad-
duction (ADD) and abduction (ABD), and squeeze test in supine with 45° hip
flexion. Flexibility measures included; hip internal rotation (IR) in both 90° flex-
ion and prone, hip ABD in side-lying and bent knee fall out (BKFO). Demographic
information was collected and the effect on the profiles was analysed. Pain on
each testing procedure was recorded.
Findings / Results:
Normative values for strength were as follows (mean±SD);
ADDnon-dominant=3.2±0.6Nm/kg,dominant=3.1±0.6Nm/kg;ABDbothlegs=
2.4±0.4 Nm/kg; ADD:ABD ratios non- dominant=1.4±0.3, dominant=1.3±0.3;
Squeeze test=3.2±0.8N/kg. Flexibility; IR in flexion both legs=37±8°, IR in prone
non- dominant=36±8°, dominant=37±8°, ABD in side lying both legs=47±8°,
BKFO non- dominant= 13.5±4.1cm, dominant=13.7±4.1cm. Leg dominance
and a past history of injury had no clinically relevant effect on the strength and
flexibility profiles. However, pain on squeeze testing significantly reduced the
score for that test (p≤0.05).
Conclusions:
Clinicians can confidently compare the strength and flexibility
profile with the non- injured leg when assessing a footballer with unilateral pain.
Pain on testing resulted in lower squeeze values, but a past history of hip or
groin injury did not affect these profiles. Future studies will examine the predic-
tive value of these measures for injury.
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