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Abstract
Background: Since 1995 begin a program of prevention, with poblational strategy, dedicated partly, to combat the sedentarysm, promoting the health and preventing the cardiovascular illnesses.
Objectives: Estimating the impact and security of four massive events to promote the physical activity in the general population.
Material and Methods: Between 1995 and 1998 we organize in Corrientes, Argentina, three Aerobic March(AM) and a Bike-march. In the AM they were carried out aerobics exercises in 1200 mts guided by professors of physical education accompanied by music. With a selfquestionary the risk was stratified in groups: A) Low risk-individuals healthy-(vigorous activity) B) intermission risk- healthy , with risk factors -( moderate activity) C) High risk-sick or with high chance-(light activity). In diabetics (Subgroup D) it was controlled glucymia pre and post-march. The Bike-march consisted on a AM and a bike-traveled of 10 kilometers, organized in groups: Red: up to 15 years. Yellow: from 15 to 45 years. White: older than 45 and special people (including blind).It was mounted a considerable organization unfolding, logistical support and sanitarium.
Results: In the AM 4000, 8000 and 8000 people participated. The majority groups went A and C. The Bike-march congregated 15000 participants. The first two groups prevailed on the bike- traveled. They only registered smaller complications that were solved in place. Analyzed with the selfquestionary, between the 25% and the 45% they continued carrying out physical activity during the time among the events.
Discussion: The growing medical and community interest for the prevention is reflected in these events, given its massive and the obtained results. Similar experiences have not been published and we think that they are useful tools to use them as strategies in political of health. Conclusion: These massive events are useful and insurance to promote the health through the physical activity.

Introduction
The promotion actions and protection of the cardiovascular health should be in agreement with the tendencies, customs, rules and activities of the different communities that are embraced, in order to internalize in the same ones the education concepts for the health. Keeping in mind these foundations the prevention of the cardiovascular illnesses can be faced according to two focuses that, far from being excluded, they are supplemented: on one hand an individual focus facing the risk in a personalized way and determining actions trying to modify the individual level of risk. The second focus is populational and it tries to change the prevalencia of the factors of risk globally in the community, with the intention of really modifying the illness pattern in a society. Following this last focus has carried out events of massive convocation that had as objective to encourage in the community the practice of the physical activity, stimulating habits of healthy life and trying to modify the prevalence of some factors of risk.

Objective
The objective of the present work is to estimate the impact and the security of four massive events dedicated to promote the physical activity in the general population, like a way of to promote the health and to prevent the cardiovascular illnesses.

Material and Methods
Between 1995 and 1998 we organize in Corrientes, Argentina three Aerobic March and a Bike -March, directed to the general population. The realization of these events demanded a warningión campaign about the benefits of the physical activity on the health and other aspects of the prevention. The aerobics marches for the first three years, they consisted fundamentally on aerobics exercises (consistent in walks along 1200 m supplemented with aerobics), being directed by physical professors and lively with music. To stratify the risk and to adapt the intensity of the physical exercises a selfquestionnaire was used, validated appropriately and that it allowed to divide the participants in three groups: Group A: Integrated for healthy people who could carry out physical activity whithout restrictions. Group B: Constituted for people who not have had antecedents of cardiovascular illnesses, they presented some factors of risk (including the sedentarysm), for what they carried out moderate physical exercises. Group C: Integrated for individuals that had had antecedents of cardiovascular illnesses or that they had high probabilities of having suffered them, and/ or other pathological antecedents, for what was convenient the realization of exercises of low intensity. Not counting the first year, in the following ones there had been a special subgroup of patients constituted by the diabetics, identified with the letter D to who were monitirizying closely with a group of professionals who carried out them a special questionnaire about glycemia analysis before and after the march.
In the Bike-march two events were coordinated in one, the Aerobic March and one Bike-traveled. This last one congregated people habituated to the cycling practice who traveled approximately 10 kilometers. They were divided in groups, according to the age and special conditions that made the journey to different speeds chord to their possibilities. The Red Group was integrated by people of up to 15 years. The Yellow Group for bigger than 15 and smaller than 45 years; and the White Group for bigger than 45 years and special people. This last one included to group of blind.
For each one of these events there had been a considerable organizational unfolding, divided in the following areas:
Technical areas and of support: general monitors, exciting monitors, speakers, technicians, hydrate teams, sound motivates, traffic, security and communications.
Area of physical activity: Integrated for professors of physical activity and students of the career of physical education.
Area of health: besides the personnel (doctor, nurses, paramedics, students of sciences of the health, kinesiólogos and biochemical) there had been ambulances, including movils units coronary.
Always the biggest logistical support and sanitarium you toasted to the groups of lives risk.

Results
In these events of massive convocation they participated 4000, 8000, 8000 and 15000 people respectively distributed as it is illustrated next

Figure 1

Figure 2

Complications: All the complications that registered along these events were smaller and solved in land with the logistical support and deployed sanitarium.
In 1995 2 hypertensive crisis hipertensivas, 2 atypical chest pain and 2 hypoglycemias were presented. In 1996, 1 hypertensive crisis and one cramp. In 1997, one crisis hipertensiva, one atypical chest pain and one smaller traumatism. In 1998, two hypertensive crisis , one atypical chest pain and one smaller traumatism. From 1996 and through the self-questionnaire it was analyzed that 25 to 45% of participants continued carrying out physical exercise in regulates form and constantly during the cheats among the events.

Discussion
The growing medical and community interest for the prevention is reflected in these given events its massive and its obtained results. The same ones have proved to be an useful tool in stimulating populations, of all the ages, so much in primary prevention and secondary, to carry out physical activity promoting the cardiovascular health, being necessary to distinguish that the Aerobic March stimulates the healthy youths and mature people mostly with or without antecedents of illnesses, and the one bike-traveled delights the children and young adults fundamentally. Similar experiences have not been published previously and we think that they plows useful tools to it uses them as strategies in political of health.

Conclusion
These massive events have demonstrated to be useful to promote the physical activity in the general population of all the ages, as much in primary prevention as secondary. The devices of security (self-questionnaire and sanitary device) they have been safe.

Questions, contributions and commentaries to the Authors: send an e-mail message (up to 15 lines, without attachments) to epi-pcvc@pcvc.sminter.com.ar , written either in English, Spanish, or Portuguese.

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