A sedentary lifestyle, a silent threat to our health

By Nathalie Szapiro-Manoukian Updated on 22/01/2018 at 17:47 Published on 22/01/2018 at 17:47
A sedentary lifestyle, a silent threat to our health
To compensate for the deleterious effects of a sedentary lifestyle, one must practice 1h30 to 2 hours of physical activity per day.
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INFOGRAPHY - Sitting for 7 hours a day on average increases the risk of developing cardiovascular disease significantly.

According to the National Observatory of physical activity and sedentary lifestyle (Onaps), the mere fact of sitting more than three hours a day is already responsible for 3.8% of deaths from all causes and whatever the level of physical activity in parallel! The problem is that this threshold of sitting three hours is largely exceeded and continues to grow: in the forties, the time spent without moving (in transport, office, in front of their TV, etc.) is estimated at twelve hours during a day at work and nine at a day off!


Professor François Carré, cardiologist and sports doctor at the Pontchaillou hospital in Rennes, author of Danger sedentarity, living more by moving more (Éd Cherche Midi), confirms the dangerousness of this situation: "Being sedentary means being sitting at least seven hours a day on average. However, to compensate for the only deleterious effects of a sedentary lifestyle, one must have at least 1h30 to 2 hours of physical activity per day. "And to this sedentary lifestyle can be added the problem of inactivity: according to WHO, below 150 minutes of moderate weekly physical activity (30 minutes a day, five days a week) or 75 minutes of intense physical activity (25 minutes three days a week), you are considered inactive.

»READ ALSO - Sedentarity: retirees more active than workers

Spending standing time lowers the risk of cardiovascular disease
"Being sedentary means sitting for at least seven hours a day on average"

Pr François Carré, cardiologist and sports doctor

The risks are far from negligible. "Beyond four hours seated daily, each new hour increases mortality by 2%; and beyond eight hours sitting per day, mortality increases by 8%. Beyond ten hours a day, it is even increased by 34%, says Professor Michel Galinier, head of the cardiology department at the University Hospital of Toulouse. Staying seated can be considered potentially lethal! Staying all day is different because it minimizes the work of the leg muscles and therefore helps to reduce cardiovascular mortality (but increases the problems of venous circulation). So just going from sitting to standing, a quarter of the time of the day, reduces cardiovascular mortality by about 21%. "

"A sedentary lifestyle, as a collective risk factor, has moved into the face of smoking because it affects more people. Being sedentary increases classic cardiovascular risk factors, such as overweight, diabetes, high blood pressure, dyslipidemia, "says Prof. Galinier. Interestingly, "the younger generation is at high risk because sports activity time has fallen sharply in recent years. There are more children who do nothing, the ease being to turn on the television, a computer screen and worse, to nibble at the same time.

»READ ALSO - Physical inactivity has increased considerably in France

As a result, only one-third of teenagers aged 11 to 17 practice at least 60 minutes a day of physical activity as recommended by WHO at this age. For Pr Carré, "this is confirmed by the decline in physical capacity, better marker of life expectancy in good health, college students. It is even more unfortunate that physical activity is not a waste of time, on the contrary: all studies find a positive relationship between level of physical activity and quality of school results.

Promote sport to children and young adults
The solutions? "Have children go out on foot, go to school, take scooters or skates to get bread, etc." Take inspiration from northern European countries where, in the primary class, "gigotage" breaks are officially scheduled at regular intervals: for a few minutes, children are invited to get up from their chairs and to run, jump, etc. . Finally, there is an urgent need to stop glorifying the body of anorexic models in favor of that of sports, to motivate young people, "suggests Pr Carré.

"Another problem is that of very active studies (such as those of medicine) which, when entering the faculty 90% of students

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