Diabetes study ties lower risk to moderate amount of body strength

Diabetes study ties lower risk to moderate amount of body strength

Strength has been tied to a lower risk of Type 2 diabetes, but you don’t need to overdo the weightlifting to reap the benefits, according to a new study.

Moderate amounts of muscle strength, but not beyond that, were associated with a 32% reduced risk of developing Type 2 diabetes in the study, published in the journal Mayo Clinic Proceedings on Monday.

“While it’s not entirely clear why higher strength did not protect against diabetes, it’s possible that higher aerobic fitness, higher amounts of physical activity and lower body mass indexes that were present in this higher-strength group were also affecting the relationship between strength and diabetes,” said Angelique Brellenthin, a postdoctoral research associate in Iowa State University’s gtx_ads_conf.ads["ad-manager-551125-3"]= {"custom_css":"","ad_details":[{"min_width":"","max_width":"","dfp_ad_sizes":[{"dfp_ad_width":"300","dfp_ad_height":"250"}]}],"ad_id":551125,"ad_container":"div-ad-manager-551125-3","ad_placement":"in-article","ad_name":"ad-manager-551125-3","position":"in_article","article_position":1};

After dividing the adults’ muscular strength tests into thirds, the researchers found that those in the middle level had a 32% reduced risk of Type 2 diabetes compared with the lower third.

Yet there was no significant association between incidents of Type 2 diabetes and the upper level of muscular strength compared with the lower level, the researchers found.

They came to their findings after taking into account other factors that may influence Type 2 diabetes risk, including cardiorespiratory fitness level.

“While we adjusted for these other healthy factors in the study, it doesn’t completely take away their potential confounding effects, particularly in the higher-strength group,” Brellenthin said. “Future studies will have to consider these to fully understand the relationship between strength and diabetes.”

The study had some limitations, including that the sample size was small, and the adults were mostly white and in a middle to upper socioeconomic status. More research is needed to determine whether similar findings would emerge among a more diverse group.

The study also did not take into account each adult’s diet, which can influence diabetes risk.

The study’s findings point to how important both muscle strength and cardiorespiratory fitness are for having a lower diabetes risk, said Dr. Monique Tello, a practicing physician at Massachusetts General Hospital and clinical instructor at Harvard Medical School, who was not involved in the study.

“People in the medium strength group tended to also have good cardiorespiratory fitness,” Tello said about the study. “There was a good correlation.”

Whereas, “in the low strength group, there were people who had high cardiorespiratory fitness, and then in the high strength group there were people with low cardiorespiratory fitness. The correlation was not as clear, so that may have washed out some of the significant findings,” she said. “We know from prior studies that combining aerobic exercise and resistance training particularly improves blood sugars in people who have diabetes, and can also prevent diabetes from developing.”

Overall, “the encouraging takeaway from this study is that you don’t need to be super strong to help reduce your risk of diabetes,” Brellenthin said.

How much strength training does your body need? Adults should perform muscle-strengthening activities on two days each week to stay healthy, according to the 2018 Physical Activity Guidelines Advisory Committee. The guidelines also recommend at least 150 minutes of moderate-to-vigorous aerobic activity every week.

“We have a solid body of evidence that shows that just being moderately in good shape — having decent muscle strength and decent cardiorespiratory fitness — is significantly associated with a lower risk of diabetes,” Tello said. “Having both of those things is very good for your health.”