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Original articles  CARDIOVASCULAR SYSTEM 

The Journal of Sports Medicine and Physical Fitness 2002 June;42(2):207-13

Copyright © 2009 EDIZIONI MINERVA MEDICA

language: English

Relationship between cardiorespiratory fitness, body composition and blood pressure in school children

Guerra S., Ribeiro J. C., Costa R., Duarte J., Mota J.

From the Research Centre in Physical Activity and Leisure, *Laboratory of Experimental Morphology, University of Porto, Porto, Portugal


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Background. The pur­pose of ­this com­par­a­tive and cor­re­la­tion­al ­cross-sec­tion­al ­study was to ­describe the asso­ci­a­tions ­between car­di­o­res­pir­a­to­ry fit­ness, ­blood pres­sure and ­body com­po­si­tion in Portuguese ­school chil­dren.
Methods. The sam­ple com­prised 529 chil­dren (246 ­males and 283 ­females) ­aged 8-15 ­years-old. Body ­height and ­body mass ­were deter­mined by stan­dard anthro­po­met­ric meth­ods. Blood pres­sures ­were meas­ured ­with chil­dren sit­ting ­after at ­least 5 min­ ­rest. The max­i­mal mul­ti­stage 20 m shut­tle run ­test was car­ried-out to pre­dict max­i­mal aero­bic pow­er.
Results. The ­present ­study ­shows ­that ­boys ­were ­more fit (p≤0.05) and ­less fat ­than ­girls (p≤0.05). Multiple regres­sion anal­y­sis ­reveals ­that ­weight and age ­explained sig­nif­i­cant­ly (p≤0.01) the ­amounts of sys­tol­ic ­blood pres­sure (SBP) and dia­stol­ic ­blood pres­sure (DBP). In ­girls, per­cent­age of fat (%F) ­showed an influ­ence on the var­i­ance in SBP (4.9%, p≤0.05). In addi­tion, ­weight (14.5%) and age (9.8%) ­account sig­nif­i­cant­ly (p≤0.01) for the ­amount of var­i­ance to DBP in ­males. For ­girls, age (11.4%) and BMI (2.4%) ­account sig­nif­i­cant­ly to the var­i­ance ­found in DBP. However, the inde­pen­dent var­i­ables, for ­both sex­es, ­account ­less ­than 50% of the over­all var­i­ance ­found in ­blood pres­sures val­ues.
Conclusions. In con­clu­sion, the ­present ­study ­shows ­that ­boys ­were ­more fit and had ­less fat ­than ­girls. The lev­el of car­di­o­res­pir­a­to­ry fit­ness ­does not ­seem to be an impor­tant cor­re­late of ­blood pres­sure vari­a­tion ­across age ­groups and gen­der.

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