What is the minimum amount of physical activity needed to manage weight and prevent gradual weight gain?

60 minutes of moderate to vigorous activity on most days of the week while not exceeding calorie needs.-b. to maintain weight: work you way up to 150 minutes of moderate-intensity aerobic activity 75 minutes of vigorous-intensity aerobic activity, or an equivalent mix of the two each week. strong scientific evidence shows that physical activity can help you maintain your weight over time. however, the exact amount of physical activity needed to do this is not clear since it varies greatly from person to person. its possible that you may need to do more than the equivalent of 150 minutes of moderate-intensity activity a week to maintain your weight.to lose weight and keep it off: you will need a high amount of physical activity unless you also adjust your diet and reduce the amount of calories youre eating and drinking. getting to and staying at a healthy weight requires both regular physical activity and a healthy eating plan.source: dietary guidelines for americans 2005, u.s. health and human services and the u.s. department of agriculture