WALKING OR RUNNING EXERCISE.WHATS BEST?

The single biggest health message is to exercise more. Exercising is a personal thing which considers your abilities, desires and personal fitness level.
Walking and running are both excellent aerobic exercise. Both will help promote weight-loss, improves your sleep, elevate your mood, boost your energy level, decrease blood pressure and cholesterol levels and decreases the risk of cancer, diabetes and heart disease.
Walking and running are low-cost, easy-to-do anywhere, year round activities. Both are to be done if you enjoy it and will be done regularly. Both are best in its own, but both have merits and demerits.
WALKING: ITS MERITS AND DEMERITS:-
Walking can be done in any place, any time and with anybody. It does need any special accessories. To start with exercising, walking is recommended, because it is less stressful than running. It cannot lose your weight as much as running. It is a slow and steady process. It burns fewer calories than running. Walkers take months to burn same calories that runners burn in weeks. Walking can be done by a person of any age and does not need any training.
RUNNING: ITS MERITS AND DEMERITS:-
Running has to be done with proper training. They need special accessories.  Runners burn more calories than walkers. They have a better chance of maintaining weight and waist circumference. Running regulates our appetite hormones. Runners stress the immune system, damage the heart, damage cartilages, cause Osteoarthritis and risk of injuries.
So walking is safer and better as an exercise.