Overall, 2,430 of those examined succumbed, 3,748 were diagnosed with cancer and 1,110 had heart problems.
But, during the course of the study, regular cycling cut the risk of death from any cause by 41%, the incidence of cancer by 45% and heart disease by 46%.
The cyclists clocked an average of 30 miles per week, but the farther they cycled the greater the health boon.
Walking cut the odds of developing heart disease but the benefit was mostly for people strolling more than six miles per week.
“This is really clear evidence that people who commute in an active way, particularly by cycling, were at lower danger, ” Dr Jason Gill, from the University of Glasgow, told the BBC News website.
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“You need to get to work every day so if you built cycling into the day it essentially takes willpower out of the equation.
“What we really need to do is change our infrastructure to make it easier to cycle – we need bike lanes, to make it easier to put bikes on develops, rains at work.”
People who combined cycling and public transport in their commute also proved health benefits.
Out of breath
The way the study, published in the British Medical Journal, was carried out entails it is not possible to determine a clear cause and effect.
However, the effect was still there even after adjusting the statistics to remove the effects of other potential explanations like smoking, diet or how heavy people are.
It means the reason cycling cuts cancer hazard cannot be down to weight loss in such studies.
Other explanations include cyclists being leaner( even if they are not weighing any less) and lower levels of rednes in the body.
Cycling is thought to be better than walking as the workout is both longer and more intense.
Clare Hyde from Cancer Research UK said: “This study helps to highlight the potential benefits of house activity into your everyday life.
“You don’t need to join a gym or run the marathon.
“Anything that get you a bit hot and out of breath – whether it’s cycling all or part way to work or doing some housework – can help make a difference.”
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