Topic: yoga helps in losing excessive body weight.

Study type: Cross-sectional

• how you will carry out the study
• what sort of study participants you will need for each design
• what information needs to be collected to investigate the link
• what measure of association/effect can be obtained for this purpose from each design
• what could be one possible practical issue/or potential bias and one confounder or confounding factor that could affect your study and the findings.