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Resistance exercise may be superior to aerobic exercise for getting better ZZZs -- ScienceDaily

Among the 42% of participants who were not getting at least 7 hours of sleep at the study's start, sleep duration increased by an average of 40 minutes in 12 months for the resistance exercise group, compared to an increase of about 23 minutes in the aerobic exercise group, about 17 minutes in the combined exercise group and about 15 minutes in the control group. Sleep efficiency increased in the resistance exercise and combined exercise groups, but not in the aerobic exercise or no exercise group. Sleep latency decreased slightly, by 3 minutes, in the group assigned to resistance exercise only, with no notable change in latency in the other participant groups.

Crosstalk among muscles and fat

After the rodents’ resistance exercise, which consisted of walking around, though, the animals’ leg muscles appeared depleted of miR-1. At the same time, the vesicles in their bloodstream now thronged with the stuff, as did nearby fat tissue. It seems, the scientists concluded, that the animals’ muscle cells somehow packed those bits of microRNA that retard hypertrophy into vesicles and posted them to neighboring fat cells, which then allowed the muscles immediately to grow.

Resistance training even as little as once per week benefits older individuals -- ScienceDaily

"But for other measures that are important for older people, such as the ability to perform activities of daily living, once per week seemed sufficient. Muscle strength that is needed for carrying shopping bags, walking up and down the stairs and sitting down on a toilet can be improved with strength training," Walker says. Training also benefits overall well-being Overall well-being, tested through psychological measures, also improved over the 9-month training period. Similarly, there were no real differences whether individuals trained only once per week or two-three times per week. The researchers found that it was very important that people improved their psychological well-being and motivation for exercise during the study period as it was those people who continued training regularly even after the study had ended. The researchers are keen to point out that their studies show the importance of resistance training for older persons; even as little as once per week can go a long way. "We need to remember that these individuals trained hard, and safely, when they were with us. We supervised every training session closely, making sure that they used correct technique and also ensured that they always tried to improve their training loads compared with previous training sessions." Walker added.

Weightlifting is good for your heart and it doesn't take much -- ScienceDaily

Less than an hour of weekly resistance exercise (compared with no resistance exercise) was associated with a 29 percent lower risk of developing metabolic syndrome, which increases risk of heart disease, stroke and diabetes. The risk of hypercholesterolemia was 32 percent lower. The results for both studies also were independent of aerobic exercise.

Association of Efficacy of Resistance Exercise Training With Depressive Symptoms: Meta-analysis and Meta-regression Analysis of Randomized Clinical Trials | Depressive Disorders | JAMA Psychiatry | JAMA Network

Resistance exercise training significantly reduced depressive symptoms among adults regardless of health status, total prescribed volume of RET, or significant improvements in strength. Better-quality randomized clinical trials blinding both allocation and assessment and comparing RET with other empirically supported treatments for depressive symptoms are needed.