Intention de changement de comportement lors de la campagne de santé publique Vas-Y au Québec

PurposeThe present study examined associations between intention of youth to change their health behaviours and the messages of a media campaign held in Québec from 2004 to 2008, designed to increase awareness on active living and healthy eating's health benefits.MethodsSix hundred and three parent-youth dyads from primary and secondary schools participated to this cross-sectional survey by questionnaire at the end of the campaign. The intention to behaviour change in youth aged 10–16 years and their parents, their respective perceptions of the campaign's messages and their exposition to the campaign according to their school level were analyzed.ResultsSeventy-eight percent of youth heard about the campaign. One third of those having indicated that they knew the messages aimed at changing one or two behaviours. Youth from primary school vs. high school (P = 0.008) and those with a positive perception of messages (P < 0.001) were youths with the highest intention to change their behaviour.ConclusionThe high level of awareness reached in such a short period suggests that campaigns with motivating messages can be used to influence attitudes and intentions to adopt healthy eating and active living.     

Variabilité de la fréquence cardiaque en fonction de l'intensité de la pratique physique chez la femme ménopausée

Aim. – Study was to asses the heart rate variability related to the physical practice intensity in post menopausal women.Method. – Time domain measurement of heart rate variability has been realised from the electrocardiogram at rest and during exercice in 3 groups of 6 women : untrained, active and trained. At rest, no significant difference betwen groups appears. But, in the standing position, RR interval and the dispersion around RR interval decrease in trained group only. During submaximal exercise, this dispersion is more elevated in active and trained groups.Conclusion. – Physical practice induces a higher response of sinus node to vagal modulation during standing position and submaximal exercise.     

Effet de l’intensité de course sur la force de poussée en rugby

Introduction. – The rugby is a discipline requiring, in the same time, strength qualities and a high aerobic capacity for repeating intense exercises over 2 × 40 min.Synthesis of the facts. – Fourteen rugby players performed a maximal progressive test of journey (running) then two sequences of 40 min, respectively, to 60% and 80% of HR_max, interrupted with pushes on a yoke with constraint gauges. At 80% HR_max, the mean scrummaging force (1466 ± 244 N) was lower (P < 0.05) than at 60% HR_max (1523 ± 266 N).Conclusion. – The qualities of specific force are directly affected by the intensity of running. Therefore, there is a need to optimize the aerobic potential notably for the players of the first line directly concerned by the fight.     

Le test de marche de 6 minutes chez le sujet sain : reproductibilité et intensité relative

Purpose – To assess the reproducibility and the intensity of the 6 min walking test (6 MWT) in healthy subject.Method – Twelve sexagenarian healthy subjects perform, on three days, a maximal exercise test on treadmill and five 6 MWT (two on the morning and three on the afternoon) with cardiorespiratory measurements.Results and conclusion – The distance ambulated and oxygen uptake recorded during the 6 MWT are reproducible from the third test while the heart rate, higher in the afternoon, is influenced by the moment of realisation of this test. The 6 MWT intensity corresponds to 79 ± 4.5% of maximal oxygen uptake. In healthy subject, the 6 MWT, sub-maximal exercise, needs two familiarization tests before being really exploitable.