Canadian and European researchers, led by Robert Boushel, director of the University of British Columbia's School of Kinesiology in Canada, analyzed tissue samples from 12 male volunteers in Sweden.
cay an xoa mua o dau
All the participants were healthy but described themselves as either untrained or only moderately active.
The men took part in high-intensity training over a 2-week period. The exercise regimen involved repeated 30-second all-out sprints, followed by rest periods.
The researchers observed signs of stress in the muscle tissues of the participants after carrying out ultra-intense leg and arm cycling exercises.
Tests showed that their mitochondria, the "powerhouse of cells," were only functioning at half their capacity after training, reducing their ability to consume oxygen and to defend against damage from free radicals.
Free radicals are molecules that can modify DNA and cause harm to healthy cells. High levels of free radicals appear to be a risk factor for a range of medical conditions, including premature aging, organ damage and cancer.
cay an xoa ban o dau
Boushel says the findings raise questions about what constitutes appropriate dosage and intensity of exercise for the average individual. He urges caution when encouraging the general population to participate in sprint training.
The study, published in Clinical Psychological Science, uses data from the Dunedin Multidisciplinary Health and Development Study that followed 1,037 New Zealand children from birth until the age of 38.
The financial consequences of cannabis abuse might be worse than alcohol.
The group represented a cross-section of the population and received a maximum of 11 follow-up assessments over the years.
For the current study, the researchers utilized data from 947 individuals.
In total, 18% of participants were considered marijuana-dependent in at least one of the assessments, and 15% were classified as regular cannabis users in at least one assessment.
cay an xoa
According to Cerdá, the team found that "regular cannabis users experienced downward social mobility and more financial problems such as troubles with debt and cash flow than those who did not report such persistent use."
cay an xoa mua o dau
All the participants were healthy but described themselves as either untrained or only moderately active.
The men took part in high-intensity training over a 2-week period. The exercise regimen involved repeated 30-second all-out sprints, followed by rest periods.
The researchers observed signs of stress in the muscle tissues of the participants after carrying out ultra-intense leg and arm cycling exercises.
Tests showed that their mitochondria, the "powerhouse of cells," were only functioning at half their capacity after training, reducing their ability to consume oxygen and to defend against damage from free radicals.
Free radicals are molecules that can modify DNA and cause harm to healthy cells. High levels of free radicals appear to be a risk factor for a range of medical conditions, including premature aging, organ damage and cancer.
cay an xoa ban o dau
Boushel says the findings raise questions about what constitutes appropriate dosage and intensity of exercise for the average individual. He urges caution when encouraging the general population to participate in sprint training.
The study, published in Clinical Psychological Science, uses data from the Dunedin Multidisciplinary Health and Development Study that followed 1,037 New Zealand children from birth until the age of 38.
The financial consequences of cannabis abuse might be worse than alcohol.
The group represented a cross-section of the population and received a maximum of 11 follow-up assessments over the years.
For the current study, the researchers utilized data from 947 individuals.
In total, 18% of participants were considered marijuana-dependent in at least one of the assessments, and 15% were classified as regular cannabis users in at least one assessment.
cay an xoa
According to Cerdá, the team found that "regular cannabis users experienced downward social mobility and more financial problems such as troubles with debt and cash flow than those who did not report such persistent use."