You are right. To lose belly fat, you have to decrease the amount of fat he has throughout his body. Spot reduction cannot be accomplished.
To reduce overall belly fat, you need to expend more calories than you consumes. Combining aerobic exercise, strength training exercise, and proper diet will provide the best results.
Just read out couple of my advice and follow those with cautious:
• Exercise 10 minutes three or more times a day. Exercise helps increase your metabolism and fat-burning rate. Finding time to exercise might be difficult in your busy life, but you only need to exercise 10 minutes at a time to get health benefits and increase your fat burn.
• Pick an exercise you enjoy and do at least three 10-minute sessions each day --- in the morning, during lunch break and before dinner, for example. Walk, bicycle, do yoga, calisthenics, climb stairs or do a combination of each.
• Cut excess sugar from your diet. Many foods you might think are healthy actually contain hundreds of calories and dozens of grams of sugar. Cut juices, sugary yogurts, cereals and snack bars from your diet. For example, 1 cup of orange juice contains over 100 calories and 20 g of sugars. When you cut 500 calories from your diet every day, you will lose 1 lb. of fat every week. Drink mint-flavored water and eat plain yogurt or oatmeal with fresh berries and fresh fruits rather than sugary varieties.
• Boost your metabolism by drinking oolong tea and eating spicy foods. 1 cup of oolong tea increases your metabolism for 2 hours. When your metabolism is increased, your body will burn more calories. Eating black pepper and other spicy foods can also have this metabolism-revving effect.
• Drink ice-cold water to make your body burn more calories. Drinking ice water forces your body to work to bring your body temperature back to normal, which burns calories. Drink eight glasses of ice water to burn an extra 70 calories per day.
• Add high-fiber foods to your meals. Foods that contain fiber can make you feel full, which can help reduce the portion sizes and calorie content of your meals. Eat fiber-rich foods such as vegetables, whole grains and fruits as snacks or with meals.
• Do abdominal exercises every day. Although you cannot spot-reduce fat around your tummy, you can tone your muscles and help shape your belly. Increased muscle mass anywhere in your body will increase your metabolism and help burn more calories even at rest.
• Replace high-carbohydrate foods such as pasta and rice from your diet by substituting them with shirataki noodles and vegetables. Serve steamed cauliflower instead of rice or spaghetti squash or shirataki noodles instead of wheat pasta, for example. This will help cut hundreds of calories from your meals.
See, running only 10 minute would not help you a great extend but if you just follow all of the above advice and change your overall life style accordingly then you would see the real change soon.
And don’t forget to consult with your doc regarding changing any diet workout regimen. Hopefully it would help.