According to a study published in the Journal of the American College of Cardiology, too much jogging may be as bad for you as not exercising at all.
Scientists studied more than 1,000 healthy joggers and non-joggers over a 12-year period.
Those who jogged at a steady pace for less than two and a half hours a week were least likely to die in this time.
But those who ran more than four hours a week or did no exercise had the highest death rates.
Analyzing questionnaires filled out by all the people in the Danish study, scientists concluded the ideal pace was about 5mph and that it was best to jog no more than three times a week or for 2.5 hours in total.
People who jogged more intensively – particularly those who jogged more than three times a week or at a pace of more than 7mph – were as likely to die as those who did no exercise.
Researcher Jacob Louis Marott, from the Frederiksberg Hospital in Copenhagen, said: “You don’t actually have to do that much to have a good impact on your health.
“And perhaps you shouldn’t actually do too much.
“No exercise recommendations across the globe mention an upper limit for safe exercise, but perhaps there is one.”
Scientists are not yet sure what is behind this trend – but they say changes to the heart during extreme exercise could contribute.
In their report, scientists suggest: “Long-term strenuous endurance exercise may induce pathological structural remodeling of the heart and arteries.”
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President Barack Obama and Vice-President Joe Biden are taking part in First Lady Michelle Obama’s health campaign Let’s Move by making a film while jogging around the White House.
Michelle Obama’s initiative intends to fight childhood obesity by encouraging healthy eating and an active lifestyle.
President Barack Obama and Vice-President Joe Biden are taking part in First Lady Michelle Obama’s health campaign Let’s Move by making a film while jogging around the White House
The first lady has unveiled new changes to US nutrition labels, the most sweeping overhaul in more than two decades.
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Goldie Hawn opted to go without any support as she went for a jog in Brentwood yesterday.
The result was an unforgiving sight of the 65-year-old star, who is in fabulous form for her age.
Goldie Hawn exposed wore than onlookers bargained for as she made her way around the suburb’s streets.
As the sun hit her grey marle single, the attire turned somewhat see-through.
Nonetheless, Goldie Hawn continued to pound the pavement, getting in her daily exercise.
Goldie Hawn opted to go without any support as she went for a jog in Brentwood yesterday
The mother-of-three paired her top with some light grey leggings and tied a blue jumper around her waist.
She clutched onto a water bottle to keep herself refreshed throughout her exercise regime.
Meanwhile Goldie Hawn and her husband Kurt Russell have this week re-listed their Malibu mansion.
The couple is asking for a whopping $11.2 million for the four bedroom and four-and-a-half bedroom home.
The late 1970s home is spread across 4,195 square feet.
The duo, who have been together for over 30 years, first tried to sell the home in 2010 for $14.8 million.