Just 1 hour on treadmill can boost metabolism for 2 days

A single workout session consisting of three 20-minute treadmill runs could activate neurons that are important regulators of blood glucose levels and energy balance as well as influence metabolism for up to two days, says a study over mice.

The findings showed that a single bout of exercise for mice could boost the activity of energy-burning neurons and inhibit the counterpart one for up to two days and those changes can last longer with more training.

“It doesn’t take much exercise to alter the activity of these neurons,” said  a neuroscientist.

“The study predicts that getting out and exercising even once in a semi-intense manner can reap benefits that can last for days, in particular with respect to glucose metabolism,” he added.

Further, a single workout consisting of three 20-minute treadmill runs caused a decrease in appetite that lasted up to six hours.

“This result may explain at the neural circuit level why many people don’t feel hungry immediately after exercise,” he said.

For the study,  the team measured the effects of short- and long-term exercise on two types of neurons that comprise the melanocortin brain circuit. Both humans and mice have this circuit.

One of the neuron types is associated with reduced appetite, lower blood glucose levels, and higher energy burning when activated while the other type increases appetite and diminishes metabolism when activated.

The study also provides avenue to research potential treatments to improve glucose metabolism in patients with conditions such as diabetes.

“It is possible that activating melanocortin neurons may hold therapeutic benefits for patients one day, especially for diabetics who need improved blood-glucose regulation,” he said.

“This research is not just for improving fitness. A better understanding of neural links to exercise can potentially help a number of conditions affected by glucose regulation,” he noted.

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Two-min stroll every half hour can ward off diabetes

Taking a two-minute walk around the office every half hour can help stave off diabetes, scientists claim.

Researchers  found that volunteers who regularly walked for just one minute and 40 seconds had lower blood sugar and insulin levels.

Leaving the desk for a brief walk every half hour can have a bigger impact on health than a brisk 30-minute walk before work, researchers said.

Raised sugar and insulin readings may be warning signs of Type 2 diabetes, a major risk factor for heart disease and stroke. In the study, researchers recruited 70 healthy adults and asked them to sit for nine hours. Their blood glucose and insulin levels were measured each time they had a meal-replacement drink. This was done after one hour, four hours and seven hours, to test how well the body absorbed sugar from foods. In second phase of the experiment, volunteers walked briskly for half an hour before sitting for nine hours.

Finally, they sat for nine hours again but this time walked around for precisely one minute 40 seconds every half hour.

The scientists found that the volunteers' blood sugar levels were lower after the brief strolls compared with when they had walked for longer and when they did not budge at all.

"Regular activity breaks were more effective than continuous physical activity at decreasing blood sugar and insulin levels in healthy, normal-weight adults," the study said.

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