You may be 40 years old, but could your brain already be showing signs of accelerated aging? New research involving more than 18,000 people suggests that the answer may depend on much more than genetics or your date of birth.

brain-derived neurotrophic factor, commonly called BDNF.

BDNF helps regulate processes involved in neuronal survival, learning, and synaptic plasticity.

However, exercise does not simply produce a predictable increase in brain neurons in every person.

Its benefits involve multiple interacting mechanisms.

Physical inactivity is among the recognized modifiable risk factors for dementia.

What may help: Aim toward at least 150 minutes of moderate-intensity aerobic physical activity per week, when appropriate for your health and abilities, and include muscle-strengthening activities.

Walking, cycling, swimming, and resistance training can all contribute to a healthier lifestyle.
8. Hearing and Vision Loss May Have Unexpected Connections to