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Ryan S. McCann and Phillip A. Gribble

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Ryan S. McCann, Kyle B. Kosik, Masafumi Terada, Megan Q. Beard, Gretchen E. Buskirk and Phillip A. Gribble

Context:

The Star Excursion Balance Test (SEBT) and Functional Movement Screen (FMS) are functional performance measures capable of predicting lower-extremity injury risk. While suboptimal SEBT and FMS performances are influenced by multiple factors, the contribution of hip strength and flexibility to these tests is mostly unknown. Examination of hip strength and flexibility influences on the SEBT and FMS may direct clinicians to better methods of correcting functional deficits.

Objective:

Determine the relationships of isometric hip strength and hip passive range of motion (PROM) with functional performance measures.

Design:

Cross-sectional.

Setting:

Athletic training facility.

Participants:

43 NCAA Division I women’s soccer players (19.65 ± 1.12 y; 166.93 ± 3.84 cm; 60.99 ± 4.31 kg) volunteered.

Data Collection and Analysis:

All participants were tested bilaterally in the SEBT; the deep squat, in-line lunge, hurdle step, and straight leg raise, comprising a lower-extremity FMS (FMS-LE); hip internal and external rotation PROM; and isometric hip extension strength (HEXT). The mean of the 3 averaged, normalized SEBT scores was used as a composite score. Pearson product moment correlations assessed relationships of SEBT and FMS-LE scores with PROM and HEXT. Significance was set a priori at P < .05.

Results:

Pearson correlations revealed anterior (ANT) SEBT scores had a low negative association with HEXT (r = –0.33,P = .004) and a low positive association with hip internal rotation PROM (PROM-IR) (r = .43,P = .003). All other correlations were negligible.

Conclusions:

Flexibility training aimed at PROM-IR may contribute to improved ANT scores. Targeting HEXT and hip external rotation PROM are likely not preferred means of correcting deficits in SEBT and FMS-LE performance.

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Ryan S. McCann, Kyle B. Kosik, Masafumi Terada and Phillip A. Gribble

Several investigators have aimed to predict recurrent injuries following acute ankle sprains, but none has done so in high school or collegiate athletes. The purpose of this study was to determine the ability of demographic, anthropometric, and disease- and patient-oriented outcomes to predict recurrent ankle sprains in athletes during the same competitive season following return to play from an ankle sprain. Only increased patient height and mass were associated with increased odds of sustaining a recurrent ankle sprain. Thus, taller and heavier patients might have the greatest risk of sustaining a recurrent ankle sprain in the same season as a previous ankle sprain.