@article{oai:oiu.repo.nii.ac.jp:00000311,
 author = {佐々木, 弘志 and 四伊, 静香 and ササキ, ヒロシ and シイ, シズカ and Sasaki, Hiroshi and Shii, Shizuka},
 issue = {1},
 journal = {国際研究論叢 : 大阪国際大学紀要, OIU journal of international studies},
 month = {Oct},
 note = {P(論文), Mechanical efficiency is defined as the proportion of the chemical energy that is transformed into mechanical work.  The mechanical efficiency of children is expected to be inferior to that of adults because their neuro-muscular and metabolic systems are not fully developed.  However, classical investigations have shown that the mechanical efficiency of children is superior to that of adults.  The purpose of this study was to compare the mechanical efficiency during aerobic cycling between children and adults.  Ten kindergarten girls and 10 collegiate females participated in this study.  Oxygen intake was measured at rest and during 4 minutes of cycling at the work rates of 0, 150 and 225 kgm/min, and mechanical efficiency was calculated as gross, net and work efficiencies.  Furthermore, the adult subjects performed the cycling at the similar relative intensities to the children.  The calculated mechanical efficiencies of the children were significantly higher than those of the adults at similar absolute work loads (p<0.05).  However, at similar relative work loads, the gross efficiency of the children was significantly lower at 70% heat rate maximum (HRmax) and their work efficiency was significantly higher at 80%HRmax compared with those of the adults.  The mechanical efficiencies were thus influenced by the work load.  Peak value of the mechanical efficiencies was found in the adult subjects, which was similar to the highest value in the child subjects.  However, the work load inducing the peak value was different from that of the child subjects, which might account for the differences in mechanical efficiency observed at similar work loads.  In conclusion, the mechanical efficiency of the cycling performed aerobically is essentially the same in children and adults.  The influence of work load on mechanical efficiency results in differences in mechanical efficiency between children and adults.},
 pages = {69--77},
 title = {5～6歳児と成人の有酸素的自転車運動における機械的効率の比較},
 volume = {17},
 year = {2003},
 yomi = {シイ, シズカ}
}