| Search (in title, abstract key word) | Result |
---|---|---|
1 | "physical activity" or "Physical activities" or "exercise or "sport" | 322,076 |
2 | "child" or "children" or "young people" or "teenager" or teenagers" or "young women" or young men" | 2,080,581 |
3 | "asthma" or "chronic illness" or "chronic disease" | 354, 750 |
4 | 1 AND 2 AND 3 | 3,125 |
5 | Remove duplicates | 2,392 |
6 | Limit to English Language | 1860 |
7 | Limit to "review articles" | 611 |
8 | Limit year 2001–2005 | 168 |
 | Papers identified from Cochrane library | 3 |
 | Full papers obtained | 61 |