Navigation Links
Metformin and exercise combination less effective for glucose control

It's common enough for researchers to look at the impacts of prescribed drugs on the body. And if you're a diabetes researcher who believes that exercise has great benefits for those with type 2 diabetes, you're hoping your research will show that. But when Normand Boul looked at the dual impacts of exercise and metformin two of the most commonly-prescribed modalities for glucose control on that very outcome, the hoped-for double whammy wasn't the result.

"The study had three objectives: we wanted to look at the effect of metformin on exercise in people with type 2 diabetes, examine the effect of exercise on metformin concentrations in the body, and finally to look at the effects of metformin and exercise on glucose control, which is essential for people with diabetes," says Boul, whose study a randomized, double-blind, crossover study - involved a multi-disciplinary team of researchers from five faculties at the U of A.

Ten men and women between 30 and 65 with type 2diabetes, but not taking glucose-lowering medication or insulin for their condition were recruited into the study. Participants were randomly assigned to take metformin or a placebo for the first 28 days of the study, then crossed over so those taking the placebo received metformin and vice versa for a second 28 day period. On days 27 and 28, participants spent six hours in the exercise physiology lab and performed different tests, including approximately 40 minutes of exercise on day 28.

"Metformin reduces glucose in the blood and many believe it does so by activating exercise-like pathways," explains Boul. "As expected, in our study metformin lowered the blood glucose concentrations measured during a two-hour period after lunch. But we found that on the non-exercise day metformin led to better glucose control after lunch than on the day our participants took metformin and exercised."

Boul thinks that because both metformin and exercise act to lower glucose levels, the combination may have triggered a counter regulatory response by the body to prevent glucose levels dipping too much. "During exercise, glucagon concentrations increased in the blood (a hormone secreted by the pancreas that raises glucose levels) but when we combined exercise and metformin the glucagon levels were almost twice as elevated."

He also said that the combination of metformin and exercise is not always worse than metformin alone. The findings of their study was likely impacted by the timing of meals relative to the exercise session participants underwent and that the intensity of exercise may have had an impact as well, including the fact that these levels were measured after a single bout of exercise as opposed to regular daily exercise.

In terms of the other foci of the study Boul says the data for the impacts of metformin on exercise were consistent with previous studies looking at this: participants showed slightly increased lactate levels, and increased use of fats as an energy source during exercise. However, he believes his study was the first to document a significantly increased heart rate when performing aerobic exercise of various intensities with metformin (six beats per minute on average). "However, all participants were able to complete the exercise portion in both metformin and placebo conditions," he says.

"Also surprising is that throughout the day that they exercised, metformin concentrations were higher than on the day that they didn't," says Boul. The reasons for this are not well understood.

Boul says despite these findings, "exercise has hundreds of benefits" and should still be an important part of a healthy approach to glucose control for those with diabetes, including those taking metformin.

"What we've learned is that the relationship between exercise and metformin is complex, and this opens the door for more research to examine how different treatments work together, especially because exercise is widely prescribed for people with diabetes and metformin is often the first line drug of choice for treating type 2 diabetes."


Contact: Jane Hurly
University of Alberta - Faculty of Physical Education and Recreation

Related medicine news :

1. Metformin Still Best First-Line Type 2 Diabetes Drug
2. Diabetes Drug Metformin Linked to Lower Lung Cancer Rate in Mice
3. Start Metformin Early for Best Results
4. Study finds 15 minutes of moderate daily exercise lengthens life
5. Want to keep your exercise resolutions? New research offers pointers
6. A Little Exercise Goes a Long Way to Cut Disease, Death Risk
7. Exercise may help prevent brain damage caused by Alzheimers disease
8. Small amount of exercise could protect against memory loss in elderly, CU study suggests
9. Regular Exercise Helps Keep Leg Arteries Clear
10. Post-Heart Attack Exercise May Depend on Where You Live
11. Regular Exercise Boosts the Brain, Too
Post Your Comments:
(Date:11/24/2015)... ... November 24, 2015 , ... With Thanksgiving right around the ... safety tips to help protect your family and vehicle. , According to the National ... Thanksgiving holiday weekend. Amica is sharing the following safety tips from the NHTSA: ...
(Date:11/24/2015)... ... ... Cold Shoulder , LLC launched their Pro Vest, the latest version of their widely ... $20,000 in under 10 hours. , The campaign, which will continue to ... to the market. , The PRO Vest provides consumers with a less expensive, one-size fits ...
(Date:11/24/2015)... PALMYRA, Wis (PRWEB) , ... November 24, 2015 ... ... Process scholarship award at Cleveland University-Kansas City (CU-KC), in Overland Park, ... scholarship from Chiropractor and University President Carl S. Cleveland III on October 16. ...
(Date:11/24/2015)... Baltimore, M.D. (PRWEB) , ... November 24, 2015 ... ... a new award for its exceptional customer service: the TrustDale certification. The award ... experience. The Baltimore stone honing , tile and grout, and hard surface ...
(Date:11/24/2015)... Boston, MA (PRWEB) , ... November 24, 2015 , ... ... What Henry Ford and Detroit Taught Me about Reinvention and Diversity by Nancy ... , Watching people suffer, with hospitals failing to adequately address the needs of patients ...
Breaking Medicine News(10 mins):
(Date:11/24/2015)... 2015   HeartWare International, Inc . (NASDAQ: ... support technologies that are revolutionizing the treatment of advanced ... Officer Doug Godshall is scheduled to present ... Conference on December 1, 2015 at 3:00 p.m. ET.  ... New York . ...
(Date:11/24/2015)... Diplomat Pharmacy, Inc. (NYSE: DPLO) announced today that ... Education and Human Resources will be presenting in the upcoming ... Plan Strategies for a Dynamic Market" on Dec. 1, 2015. ... consultant with the Cambridge Advisory Group, where she leads their ... The webinar will discuss the rapid growth of oral oncolytics, ...
(Date:11/24/2015)... 24, 2015 Teledyne DALSA , a Teledyne ... technology, will introduce its CMOS X-Ray detector for mammography ... 29 to December 3, at McCormick Place in ... diagnostic and interventional imaging will be on display in the ... of advanced CMOS X-Ray detectors is the industry benchmark for ...
Breaking Medicine Technology: