India, Dec. 2 -- People in Japan are often admired for their longevity, vitality, and fit physiques even in their senior years. While diet and exercise are key, a surprising daily habit followed by many in Japan plays a crucial role in keeping the body youthful. Dr Tarang Krishna, cancer specialist and MD at Cancer Healer Centre with more than 22 years of experience, shares in a podcast with Raj Shamani this 'Japanese rule' and explains how it can help anyone stay healthy, energetic, and fit for years to come. (Also read: Orthopaedic surgeon says 'roti is the worst'; shares how it can cause weight gain, spike blood sugar )

"There is a principle in Japan called 'Hara Hachi Bu,'" says Dr Tarang. "It means that whenever you are eating, you ...