A new drug has been suggested which could increase muscle mass in the arms and legs without any known side-effects.
Researchers at the University of Virginia Health System claim that MK-677 - an investigational treatment - may be used to reduce frailty in aging.
The study, which has been published in the Annals of Internal Medicine, found that 20 percent of the muscle mass which was lost during the normal aging process was restored in seniors who took the drug.
It is believed the treatment works by stimulating the growth hormone secretagogue receptor which regulates the appetite and scientists claim it may also be a suitable medication for patients with metabolic disorders.
The university's Dr Michael O Thorner said: "The search for anti-frailty medications has become increasingly important because the average American is expected to live into his or her 80s and most seniors want to stay strong enough to remain independent as they age."
Meanwhile, the University of British Columbia in Vancouver has claimed that the anti-epilepsy drug valproic acid may be suitable for the treatment of Alzheimer's disease.