You are in your 40s
People at their 40s tend to naturally lose muscle if they do not do sports and stay passive. The less lean muscle mass you have the less calories you burn. Besides all this your metabolism needs boosting to help you get rid of fat, that’s why it is extremely important to look through your diet and improve it.
Recommended: Pilates is a great choice. You should combine flexibility workout and strength training. Special exercises that Pilates offers will help you gain some muscle mass and burn stubborn tummy fat. This type of exercise is advised for women who have had children and want to tone up their abdominal muscles. Another thing to keep in mind is that your digestive system needs some additional help. To maintain or even improve it experts recommend you take a fiber supplement.

You are in your 50s and over
Whatever you do at your 50s to stay in shape will do just fine when you reach your 60s, 70s and any older age. Watch what you eat and include as many various vegetables as possible. Read meat is not recommended, however, lean protein is absolutely necessary. Take care of your bones and prevent osteoporosis by eating plenty of calcium-rich foods.
Recommended: Resistance training is what you need after the age of 50. You will both increase your muscle mass and help your body release the “happiness” hormone called serotonin. Not only will active lifestyle strengthen your core and make your tummy flat it will also protect your knees, back and hips from injury.