Taken from Road.cc:
The publication, displaying its singular talent for misinterpreting scientific research, manages to somehow extrapolate the notion that cycle commuting is “one of the biggest causes of heart attacks,” from a study that makes no such claim whatsoever.
The Mail’s interpretation of the research by Dr Tim Nawrot, from Hasselt University in Belgium published in The Lancet is stunningly simple. If exposure to traffic and physical exertion are significant ‘final straw’ factors in inducing a heart attack and cycle commuting involves both, then, voila!, it follows that: “cycling to work is one of the biggest causes of heart attack.”
Must have been a slow news day. Although that's assuming that anything that the Mail prints can be counted as news in the first place...