To burn 1,000 calories per day, a person must perform a high-intensity combination of aerobic exercise, occupational activities and household chores. The number of calories burned during an activity depends on the person's weight, the intensity of the exercise and the type of activity performed.
Walking 3.5 miles per hour for 30 minutes only burns 120 calories for a 125-pound person. This means a person would have to walk at this pace for more than four hours per day to burn 1,000 calories. Even high-impact step aerobics only burns 300 calories in 30 minutes for someone who is 125 pounds.
Running or cycling at high speeds burns a lot of calories in a short amount of time. Running 7.5 miles per hour burns 375 calories in 30 minutes for a 125-pound person, 465 calories in 30 minutes for a 155-pound person, and 555 calories in 30 minutes for a 185-pound person. At this speed, it would take just one hour for a 185-pound person to burn more than 1,100 calories.
For someone who cannot engage in this much vigorous activity, it is still possible to lose weight by pairing regular exercise with reduced caloric intake. Drinking two glasses of water instead of two 12-ounce cans of cola cuts about 275 calories from a person's diet, for example. It is advisable to speak to a medical professional before starting a diet or engaging in a physical activity program that burns 1,000 calories per day.