Ignore the people trying to sell you magic potions and tricks to flush the weight away. The fact is running or biking would be fine for you as long as you hit your target heart rate for a sustained period of time (you'll have to bike for a longer time period). This in turn will help your body burn up those calories. Once you lose those 5 extra pounds you can find exercises which can tone your midsection, and give toy the slimmer look you desire.