Martha Stewart reveals the secret to maintaining her incredibly youthful looks

Martha Stewart has given fans a unique insight into the rigorous daily routine that has helped her preserve her remarkably youthful looks well into her 80s.The popular TV personality and businesswoman - America's first self-made female billionaire - has become synonymous with entrepreneurial aptitude, professional versatility and hard graft after starting her career as a model in the 1950s.But those attributes have been eclipsed by her ability to remain fresh, active and youthful at the age of 84, a time when most people are deep into retirement.Appearing on US podcast Lipstick On The Rim , Stewart admitted the daily routine she relies upon to keep her mind and body thriving begins at an unconventional hour.