The decline in muscle strength that occurs as we age can reduce quality of life by making everyday tasks harder. The process is not well understood, but it is clear that preserving muscle tone is key.
It is known that in adults in their prime caffeine helps the muscles to produce more force. But as we age, our muscles naturally change and become weaker. So, sports scientists at Coventry University looked for the first time at whether caffeine could also have a strengthening effect on pensioners.
Source - Daily Mail