Effects of Physical Activity on Cardiovascular Risk Markers in School-Aged Mexican Children

Study Overview
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Brief Summary
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Childhood obesity is a public health problem; in Mexican children a high prevalence of cardiovascular risk factors are present. Physical activity has been proposed as a strategy to reduce this risk. We conducted a pre-posttest intervention study of 214 school-aged Mexican children (4th to 6th grade), to assess the effects of two physical activity routines with different duration and intensity (40 minute aerobic routine vs. 20 minute routine) on cardiovascular risk markers. Physical activity routines were assigned randomly to two public schools in Toluca, Mexico (20 min: group 1 (n= 117), 40 min: group 2 (n=97)). The routines were implemented Monday through Friday for 12 weeks. Nutrition assessment was done before and after the intervention and included anthropometric measurements (weight, height, body mass index, waist circumference and body composition), blood pressure and biochemical analysis (triglycerides, total cholesterol LDL-cholesterol, HDL-Cholesterol, glucose and insulin). Heart rate was monitored 3 times during the intervention to evaluate the routine´s intensity.

Official Title
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Effects of Physical Activity on Cardiovascular Risk Markers in School-Aged Mexican Children

Conditions
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Obesity, Cardiovascular Disease

Intervention / Treatment
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* Other: physical activity


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: All children from 4th to 6th grade, from 2 public urban schools in Toluca, Estado de México Exclusion Criteria: If they have a chronic disease If they can not do exercise If they have low body mass index (BMI less than 5th percentile). If they miss more than 20 sessions If they decide that they did not want to participate any more.

Ages Eligible for Study
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Minimum Age: 8 Years
Maximum Age: 13 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Group 1<br>20 min. physical activity routine | Other: physical activity<br>* physical activity routines 5 times a weeks for 12 weeks.<br>|
| Experimental: Group 2<br>40 min. aerobic physical activity routine | Other: physical activity<br>* physical activity routines 5 times a weeks for 12 weeks.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Evaluate the effect of physical activity routine on cardiovascular risk markers |  | 3 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| measure heart rate to evaluate the intensity of physical activity routines |  | 3 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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school-aged, children, obesity, cardiovascular risk, physical activity