[header] How to avoid summer weight gain [title] Avoid sleeping in and staying up late. [step] Do your best to stick to your normal sleeping habits, whether you have the entire summer or just a couple weeks off from school or work. Go to bed and wake up at the same times every day, and avoid sleeping too late. 
A change in routine can disrupt your workout and eating routines. [substeps] If you sleep too late in the day, you'll be less likely to be physically active and more likely to gain weight.