Exercising for 30 minutes a day will help you to lose weight by burning calories.
You can try the following workout:
Walk for two minutes, then alternate 30 seconds of walking with 30 seconds of running. Do this for six minutes.
Alternate jogging for one minute with running at a faster pace for the next minute. Do this for 20 minutes.
Walk or jog for two minutes to relax your muscles and cool down.
Source: Runnersworld brochure