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      The effects of physical activity and maturation on boys' (8 to 16 years) running economy

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      MATTSPENCER.pdf (6.263Mb)
      Date
      2004-10-18
      Author
      Spencer, Matthew D.
      Type
      Thesis
      Degree Level
      Masters
      Metadata
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      Abstract
      Previous reports have demonstrated that running economy (RE), a measure of efficiency of locomotion, is superior in adults than in children; however, it is unclear how these differences come to be. Purpose: To identify the effect of maturity status, physical activity and various other anatomical and physiological factors on RE development in boys aged 8 to 16 years. Methods: Data were collected as part of the Saskatchewan Growth and Development Study (SGDS; 1964-1973). Using a pure longitudinal study design, anthropometric, maturity, physiological characteristics (treadmill run) and physical activity were assessed annually for nine consecutive years. Two-hundred and two eight year-old males were measured in 1965; by 1973, complete longitudinal data were available for 63 participants. During the treadmill run, a measure of submaximal oxygen consumption (VO2) was recorded, an index of RE. Four approaches of normalizing VO2 to body size were investigated. Maturity status was determined based upon chronological age at peak height velocity (PHV). Physical activity was assessed by two teacher ratings and two questionnaires. Results: Normalizing VO2 to body surface area was found to be the most appropriate body size adjustment. Submaximal VO2 (ml/m^2/min) at 9.6 km/h decreased with increasing chronological age (p
      Degree
      Master of Science (M.Sc.)
      Department
      College of Kinesiology
      Program
      College of Kinesiology
      Supervisor
      Baxter-Jones, Adam D. G.
      Committee
      Faulkner, Robert A.; Drinkwater, Donald T.; Unnithan, Viswanath
      Copyright Date
      October 2004
      URI
      http://hdl.handle.net/10388/etd-11302004-112922
      Subject
      running economy
      maturation
      scaling
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      • Graduate Theses and Dissertations
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