Researchers in Britain followed 125 cyclists over the age of 55 and found that they had immune systems of 20-year-olds.
The findings included that the cyclists, who were lifetime exercisers and had completed two, long-distance endurance rides prior to testing, preserved muscle mass better than a control group and that their immune systems functioned closely to that of a young adult in the peak of health.
"The data support the view that high levels of exercise training are able to maintain numerous properties of muscle which are negatively affected by aging when it is accompanied by sedentary behaviour", the authors wrote in their conclusion.
The testosterone levels seen in male pensioners who cycled were the same as those in middle age, suggesting they had avoided the "male menopause".
Studies in the past have also proven that cycling has remarkable health benefits. The men had to be able to cycle 100 km in under 6.5 hours, while the women had to be able to cycle 60 km in 5.5 hours.
The non-practicing bunch comprised of 75 sound individuals aged 57 to 80 and 55 youthful grown-ups aged 20 to 36. Be that as it may, the thymuses of more seasoned cyclists were observed to create the same number of T-cells as those of youngsters.
Prof Norman Lazarus, 82, of King's College London, who took part in and co-authored the research, said: "If exercise was a pill, everyone would be taking it".More news: At Sri Sri Srinagar event, slogans, quick exits
He added saying, "However, importantly, our findings debunk the assumption that ageing automatically makes us frailer".
"Their bodies have been allowed to age optimally, free from the problems usually caused by inactivity".
Doing lots of exercise in older age can prevent the immune system from declining and protect people against infections, scientists say.
We already know that regular exercise reduces risk of diseases associated with aging, like cardiovascular problems. "Remove the activity and their health would likely deteriorate", Harridge said in a statement. Almost everybody can partake in an exercise that is in keeping with their own physiological capabilities. "You will reap the rewards in later life by enjoying an independent and productive old age".
The findings can be found detailed in two papers published online in the journal Aging Cell.
The researchers are planning to continue study the cyclists.