Comparing Ankle Range of Motion, Functional Ability, Talar Tilt Angle and Foot Injuries between High School Ballet Majors with and without Foot Deformities

Article information

Korean J Health Promot. 2014;14(2):74-81

Publication date (electronic) : 2014 January 20

doi : https://doi.org/10.15384/kjhp.2014.14.2.74

Department of Physical Education, Sookmyung Women's University, Seoul, Korea

Corresponding author：Chung Moo Lee, PhD Department of Physical Education, Sookmyung Women's University, Suryeon Faculty Building 611, Cheongpa-ro 47-gil 100, Yongsan-gu, Seoul 140-742, Korea Tel: +82-2-710-9439, Fax: +82-303-0799-0369 E-mail: chung@sm.ac.kr This Research was supported by the Sookmyung Women's University Research Grants (1-1303-0199).

Received 2014 March 19; Accepted 2014 June 05.

Abstract

Background

The purpose of the study was to compare and contrast ankle range of motion, functional ability, talar-tilt angle and foot injuries between high school ballet majors with and without foot deformities and to provide fundamental data about effective intervention methods for their successful performance and injury prevention.

Methods

Subjects were 18 female high school ballet dancers, eight with foot deformities and ten without foot deformities. For statistical analysis, the independent t-test (SPSS 20.0; SPSS Inc, Chicago, IL, USA) was used and the significant level of P<0.050 was selected.

Results

1. Foot injuries of plantar flexion and talar tilt were significantly different between the two groups (P<0.050). 2. The deformity group displayed a higher proportion of mechanical instability compared to that of the control group.

Conclusions

Foot deformities in high school students majoring in ballet can have negative effects to the ankle joint, with a strong possibility of ankle instability and foot injuries linked to tarlar tilt, and quite probably, of chronic ankle sprain.

Keywords: Foot deformities; Foot injuries; Range of motion

Figure 1.

Calcaneal pitch angle

Talar tilt

Plantar flexion

Dorsi flexion

General characteristics of subjects^a

Table 2.

Shapiro-Wilk test

Table 3.

Comparison of ankle range of motion, functional ability and talar tilt^a

Table 4.

Comparison of foot injury rates^a

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Table 1.

General characteristics of subjects^a

Variables	FDG (n=8)	NCG (n=10)
Age, y^∗	17.50±0.53	17.20±0.78
Career, mo^∗	109.00±29.47	103.30±18.86
Height, cm	164.46±5.28	162.99±2.48
Weight, kg	47.16±3.46	47.75±2.69
FM, kg	8.27±2.28	7.53±1.46
FFM, kg	20.98±2.19	22.06±1.11
%fat, %	20.45±1.23	21.83±1.12
BMI, kg/m²	17.40±1.14	17.77±0.74
Calcaneal pitch angle^b, °	18.46±1.57	22.39±2.69

Abbreviations: FDG, foot deformity group; NCG, normal comparison group; FM, body fat mass; FFM, fat-free mass; %fat, percent fat mass; BMI, body mass index.

Values are presented as mean±SD.

Lateral view of right foot.

Table 2.

Shapiro-Wilk test

Variables	FDG (n=8)			NCG (n=10)
Variables	Statistic	df	P	Statistic	df	P
Range of motion
PF, ^○	0.867	8	0.141	0.911	10	0.291
DF, ^○	0.958	8	0.790	0.927	10	0.418
Balance test, s^∗	0.857	8	0.112	0.928	10	0.432
Side step test, times/20 s	0.882	8	0.197	0.873	10	0.108
Talar tilt, ^○	0.967	8	0.873	0.946	10	0.622

Abbreviations: FDG, foot deformity group; NCG, normal comparison group; PF, plantar flexion; DF, Dorsi flexion.