2014, Volume 6, Issue 1
Daily step counts and selected biological and psychological variables in 16-18-year-old girls
Adam Kantanista1, Pawel Lisowski1, Agata Glapa1
1Department of the Methodology of Physical Education, University School of Physical Education in Poznan
Author for correspondence: Adam Kantanista; Department of the Methodology of Physical Education, University School of Physical Education in Poznan; email: adam.kantanista[at]gmail.com
Background: The aim of this study was to assess the relationship between the number of steps a day and biological (body fat, lean body mass, BMI and estimated VO2 max) and psychological (self-efficacy, enjoyment of PA and self-perception of body image) factors in 16-18-year-old girls.
Material/Methods: The study included data from 60 girls, aged 16-18. Voluntary participants were selected from a public high school in Poland. Number of steps was measured with a pedometer Yamax Digi-Walker, model SW 701, during 7 days. Girls were classified into three groups: low active, slightly active and active (5,000-7,499; 7,500-9,999; ≥ 10,000 steps/day, respectively). The levels of psychological factors were determined by means of a questionnaire survey. Estimated VO2 max was assessed by a 1-mile walk test. The percentage of body fat and lean body mass was evaluated
using Bodystat 1,500, bio-impedance method.
Results: Analysis of variance showed no statistically significant differences in the biological and psychological variables among low active, slightly active and active girls.
Conclusions: Girls in the study performed approximately from 5,000 to 12,500 steps a day. To explain better relationships between daily step counts and psychological and biological variables future research should additionally involve girls with less than 5,000 steps a day and more than 12,500 steps a day.
Key words: physical activity, step counts, adolescence, girls, psychological and biological variables