Article

A greater Q-angle has been suggested as a risk factor for
Patellofemoral Pain Syndrome. Greater frontal plane knee moment and impulse have
been found to play a functional role in the onset of Patellofemoral Pain Syndrome
in a running population. Therefore, the purpose of this investigation was to
determine the relationship between Q-angle and the magnitude of knee abduction
moment and impulse during running. METHODS: Q-angle was statically measured,
using a goniometer from three markers on the anterior superior iliac spine, the
midpoint of the patella and the tibial tuberosity. Thirty-one recreational
runners (21 males and 10 females) performed 8-10 trials running at 4m/s (SD 0.2)
on a 30m-runway. Absolute and normalized knee moment and impulse were calculated
and correlated with Q-angle. FINDINGS: Negative correlations between Q-angle and
the magnitude of peak knee abduction moment (R(2)=0.2444, R=-0.4944, P=0.005) and
impulse (R(2)=0.2563, R=-0.5063, P=0.004) were found. Additionally, negative
correlations between Q-angle and the magnitude of weight normalized knee
abduction moment (R(2)=0.1842, R=-0.4292, P=0.016) and impulse (R(2)=0.2304,
R=-0.4801, P=0.006) were found. INTERPRETATION: The findings indicate that
greater Q-angle, which is actually associated with decreased frontal plane knee abduction moment and impulse during running, may not be a risk factor of
Patellofemoral Pain Syndrome.
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Langue : ANGLAIS