A research report submitted to the Faculty of Health Sciences, University of the
Witwatersrand, Johannesburg, in partial fulfillment of the requirements for the
degree of
MSc(Med) in the field of Biokinetics.
Johannesburg, 2012 / Introduction: Body composition assessment should be routine practice for health
care professionals involved in ballet dancer health and wellness. It could serve as
a tool to quantify appearance in dance in order to guide adolescent dancers
towards appropriate body composition goals. The data obtained from body
composition can be used to identify the “at risk dancer” and thus serve as a
screening tool. Young dancers at risk to develop amenorrhea and possible
osteoporoses later in life can be identified. The aim of this study was to investigate
the body composition and somatotype of two groups of female adolescent ballet
dancers, classified as having low – moderate training(< 10 hours per week) and
those having moderate - high training(≥ 10 hours per week). The dancers who
trained more or equal to 10 hours per week, were classified as Group one and the
dancers who trained less than 10 hours per week, were classified as Group two.
Methods: Fifteen subjects aged 13 – 18 years from Johannesburg and 39
subjects aged 13 – 18 years from Pretoria were invited to participate and
volunteered for the study. All ethical procedures were conformed to.
Anthropometric measurements were taken on all subjects and the data was used
to compute percent body fat, body mass index and somatotype for each subject.
Subjects completed a questionnaire pertaining to their demographic information,
medical history, eating habits and training habits. Descriptive and inferential
statistical methods were computed in order to determine variances, standard
v
deviations and means of the study population. Correlations between variables
were also computed.
Results: The two groups differed significantly with respect to mean arm girth
(flexed), mean chest girth, mean biacromial breadth as well as body mass
measurements. The group that trained more had higher measures for all
components tested. The somatotypes of the subjects in Group one were
predominantly localized in the endo-mesomorphic and endo-ectomorphic areas.
Subjects in Group two were predominantly classified as ecto-endomorph.
Conclusion: The study showed that there was no significant difference between
the body composition of the group who trained less or equal to ten hours per week
and the group who trained more than ten hours per week. The correlation results
with respect to anthropometric data indicated that body mass, body mass index
(BMI) and triceps skinfold measurements are the best measures to represent
anthropometric data in female adolescent ballet dancers. The correlation results
also indicated that body mass, BMI and percent body fat are not dependent on
physical activity, but these variables might be more influenced by other factors,
such as dietary intake.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:wits/oai:wiredspace.wits.ac.za:10539/13624 |
| Date | January 2012 |
| Creators | Lourens, Tanya |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Format | application/pdf |
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