Sleeping pills pose the same threat as smoking a packet of cigarettes a day, it’s linked to cancer and heart attack.
They cause infections, falling and dementia in the elderly, and they lose their effectiveness after a few weeks.
The drugs block acetylcholine – which patients with Alzheimer’s disease are believed to lack, causing them drowsiness.
Researchers found the common pills may also increase the risk of contracting pneumonia.
Adults are advised to complete 150 minutes of such physical activity each week, with most choosing a brisk walk or gentle cycle.
Doing natural exercise, without the need to visit the gym, may provide the biggest benefits.
He added: ‘I think trying to do it outside is also helpful, because bright light can help promote sleep.