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Mechanical Power Output in Children Aged 11 and 14 Years
Author(s) -
DAVIES C. T. M.,
YOUNG K.
Publication year - 1985
Publication title -
acta pædiatrica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 115
eISSN - 1651-2227
pISSN - 0803-5253
DOI - 10.1111/j.1651-2227.1985.tb10027.x
Subject(s) - jumping , cycling , anthropometry , muscle power , medicine , power (physics) , significant difference , mathematics , physics , physical therapy , thermodynamics , history , physiology , archaeology
.Short‐term power output in jumping and cycling has been measured in 56 children aged 11 and 14 years. The results showed that the peak power output in cycling ( W b ) and jumping (W p ) were closely associated ( r =0.91) but in absolute terms W b was ±34 % greater than W b . There were no significant differencs in W b (or W p ) between the 11‐year‐old boys and girls, but the 14‐year‐old boys recorded –25 % higher power output values in cycling and jumping than girls of the same age and were approximately twice as powerful as their younger male counterparts. The velocity of movement in cycling ( V b ) and jumping ( V r ) for a given age were identical and independent of sex in the younger children. Peak power output in cycling was reached when force and velocity were equivalent to 50 % of their calculated maximal values. When W b and W p were related to an anthropometric estimate of leg muscle (plus bone) volume the difference in absolute power output between the children disapppeared. The results suggest that the difference between W p and W b and the increase in absolute mechanical power output with age is mainly a function of size and the force which can be exerted at the optimal frequency of movement in children.