Influence of quadriceps angle on static and dynamic balance in young adults

Abstract

BACKGROUND:

Changes in postural stability may be a reason for injuries in individuals who have altered musculoskeletal alignment. Q angle (QA) has shown to be a predictor for lower extremity injuries. However, the relationship between balance and QA has not been investigated in young adults.

OBJECTIVE:

The aim of the study was to investigate the relationship between QA and balance in young adults.

METHODS:

Ninety participants performed the single leg stance test (SLST) and Star Excursion Balance Test (SEBT) to assess static and dynamic balance, respectively. QA was measured using a manual goniometer. Participants were divided into low, normal and high QA groups.

RESULTS:

The relationship between SLST and QA was not statistically significant in both eyes opened and closed condition ( $r=$ $-$ 0.030, $p=$ 0.782; $r=$ 0.031, $p=$ 0.774; respectively). SLST scores did not differ among the three groups in both eyes opened and closed condition ( $p=$ 0.781, $p=$ 0.790; respectively). QA significantly correlated with lateral, posterolateral directions and sum score of SEBT ( $r=$ 0.240, $p=$ 0.023; $r=$ 0.269, $p=$ 0.010; $r=$ 0.210, $p=$ 0.047). The comparisons among the low, normal and high Q angle groups’ SEBT scores showed that balance performance in lateral direction was poorer in low QA group ( $p=$ 0.027).

CONCLUSIONS:

The results of the study showed that QA and dynamic balance have a significant relationship. To reduce musculoskeletal injury risk, the dynamic balance should be assessed in young adults who have lower QA.