Moderate levels of exercise are often prescribed for people recovering from a heart attack or heart surgery, but pumping up workouts to high-intensity level may also be a safe option, according to a Norwegian study.
"The results of the current study indicate that the risk of a cardiovascular event is low after both high-intensity exercise and moderate-intensity exercise," wrote Oelvind Rognmo, lead author of the study and a researcher at the Norwegian University of Science and Technology, in the journal Circulation.
Rognmo said there is plenty of evidence that the harder people work out, the more benefit they gain in cardiovascular function. His team wanted to see if heart patients could benefit from high-intensity exercise, too.
The concern for heart patients, though, is that the higher exertion may carry an increased risk of heart malfunction.
Rognmo and his colleagues tracked 4,846 patients at three cardiac rehabilitation centres in Norway who racked up a combined total of more than 170,000 hours of aerobic exercise.
More than 129,450 hours was spent working out at moderate intensity and the rest was at high intensity. All people in the study participated in both types of exercise.
The moderately paced workouts included an hour of walking or other exercise at 60 to 70 percent of their maximum heart rate.
At high intensity, people trained at repeated four-minute intervals -- alternating high-impact exercise such as cycling, jogging or cross-country skiing, to get their heart rate up to 85-95 percent of capacity -- followed by four minutes of more relaxed activity, such as walking.
During the more than 129,000 hours people spent exercising moderately, one person died from cardiac arrest. During more than 46,000 hours of high-intensity workouts, two people had cardiac arrests but survived.
"We found that both types of intensities were involved with low event rates," Rognmo said.
"I think (high-intensity training) should be considered for patients with coronary heart disease."
But he and his colleagues wrote that the differences in the numbers of cardiac arrests was too small to conclude whether high-intensity exercise is more dangerous than less demanding workouts.
"I think we're on the right track, but before we make it a standard recommendation, let's get our safety data," said Steven Ketevian, the director of preventive cardiology at Henry Ford Hospital in Michigan, who was not involved in the study. SOURCE: http://bit.ly/OCEkC3
When Rufino Borrego was 13, he was diagnosed by a Lisbon hospital as having incurable muscular dystrophy, the Jornal de Noticias reported.
Facebook CEO, wife to begin $3 billion initiative by building new research center
In a joint statement, the Ministry of Health and the National Environment Agency confirmed 16 new cases, four of which were not linked to existing cluster areas.
A report by the The Climate Institute suggests that coffee could become extinct by 2080 if serious changes aren't made
The US and China - together responsible for 40% of the world's carbon emissions - have now both ratified the Paris global climate agreement.
Government says antibacterial soaps no better than plain soaps, could affect human health
Indonesia joins countries issuing travel advisory for Singapore, where number of viral infection cases have risen to 82
When dealing with ADHD, learning disorders and autism, how many of us focus on the connection between our gut flora, what we eat, and our mental state?
In an interview Hollywood actor Jean Claude Van Damme has stated that he favoured Arabic food and that the diet followed by the Prophet Muhammad was one that was best for the human body
El Nino has devastated Mozambique's Gorongosa park with political tensions threatening the park
Cupping therapy is an ancient form of alternative medicine in which a therapist puts special cups on skin for a few minutes to create suction, the therapy itself dates back to the time of the Prophet Muhammad.
The Earth has hit a record high with an overall globel temperature the highest ever on record
The National Institute of Health may fund research into mixed embryos to better understand human diseases and develop therapies to treat them.
Travel across multiple time zones disrupts circadian rhythms resulting in jet lag
After five years the radiation levels in the Pacific Ocean are close to normal levels after a nuclear meltdown in the city
A trilateral pledge will see a jump from the current collective clean power levels of about 37% to 50% by 2025