Gentle yoga classes may help people with type 2 diabetes take off a small amount of weight and steady their blood sugar control, a small study suggests.
The study, of 123 middle-aged and older adults, found that those who added yoga classes to standard diabetes care shed a handful of pounds over three months. Meanwhile, their average blood sugar levels held steady -- in contrast to the non-yoga-practicing "control" group, whose blood sugar levels rose.
The findings, reported in the journal Diabetes Care, do not suggest that yoga should replace other forms of exercise for people with type 2 diabetes—a disease commonly associated with obesity.
To really lose weight and rein in blood sugar, more-vigorous exercise would work better, according to Shreelaxmi V. Hegde of the Srinivas Institute of Medical Science and Research Center in Mangalore, India.
Among the 60 study participants who took yoga classes several times a week, the average BMI—a measure of weight in relation to height—declined from 25.9 to 25.4. A BMI between 25 and 30 is considered overweight.
"In our study the effect of yoga on BMI (body mass index) and blood sugar control was marginal," Hegde, the lead researcher on the work, told Reuters Health in an email. "But," she added, "it should be noted that yoga controlled the blood sugar levels which otherwise rose in the control group."
In addition to that, the study found, signs of so-called oxidative stress declined in the yoga group.
Oxidative stress refers to a situation where levels of reactive oxygen species or "free radicals"—damaging byproducts of energy use in cells—rise beyond the body's capacity to neutralize them. Long-term oxidative stress is believed to contribute to a host of chronic diseases.