India, April 22 -- Staying healthy takes consistent effort, especially as one grows older. The weakness that is known to set in with advanced age is usually due to the loss of muscle mass and bone density.

While the effects may take time to become apparent, according to Dr Jeremy London, a board-certified cardiothoracic surgeon with 25 years of experience, the process starts within the body as one enters middle age.

Taking to Instagram on April 21, he claimed that it was possible to reverse the effects with consistent effort, and shared four key ways in which that can be achieved.

In his words, "Sarcopenia (age-related loss of skeletal muscle) and osteoporosis (weakening of bones) are inevitable threats for most of us as we enter middl...