Physical activity and exercise Archive

While the drug therapy is becoming more widely available, the science is still not clear on how it may help.

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Medical marijuana has been approved in 28 states and the District of Columbia, but researchers are still trying to connect the dots as to how, and if, it works.

"Unfortunately, there are almost no uses of medical marijuana that have been subjected to the kind of rigorous testing you'd want for a pharmaceutical," says Dr. Kenneth Mukamal, associate professor of medicine at Harvard-affiliated Beth Israel Deaconess Medical Center. "This does not mean that it has no benefits, but only that the lack of human studies prevents us from being sure if medical marijuana can really help."

In the journals

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Trouble sleeping? You may need to examine your outlook on life. A study published online July 10, 2017, by Sleep Science and Practice found that people who felt they had more meaning and purpose in their life had fewer sleep disturbances like sleep apnea and restless legs syndrome.

Researchers asked 823 older adults, average age 79, to fill out questionnaires about their sleep quality and their feelings about their lives, such as how strongly they agreed with statements like "I feel good when I think of what I've done in the past and what I hope to do in the future."

In the journals

Hearing aids can cost thousands of dollars, but a study in the July 4, 2017, Journal of the American Medical Association found that less expensive over-the-counter personal sound amplification products (PSAPs) might be a good alternative for some people.

PSAPs resemble hearing aids and help amplify sounds the same way, but are not regulated by the FDA and thus cannot be marketed as a correction or treatment for hearing loss. They often are advertised as being helpful in noisy places like crowds and meetings, and are sold online for about $200 to $400.

Ask the doctors

Q. I recently decided to give up soda and switched to flavored seltzer water. Is this a better choice for my health?

A. First, congratulations on giving up soda. Sugary drinks like soda have been linked to an increased risk of type 2 diabetes, heart problems, and other chronic health conditions, so that is definitely a win for your health. Switching to seltzer is a much better choice, provided you choose a brand that is sugar- and calorie-free.

Finding motivation to move is easier with these simple strategies.

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If the treadmill in your bedroom looks more like a coat rack than a piece of workout equipment, you're not alone. Many women struggle to commit to and keep up with a regular exercise program.

Often, they've got legitimate reasons for skipping those workouts.

Research we're watching

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Some women squeeze in exercise by using active workstations, which enable them to move more during the workday. But you may wonder: will this type of multitasking make you less productive on the job?

A study in the May issue of Medicine & Science in Sports & Exercise says it doesn't appear to. The study authors tested the cognitive performance of 58 workers — 32 young and 26 middle-aged — who were asked to walk for 50 minutes at a time on an active workstation treadmill. The study authors concluded the walking didn't hinder the workers' ability to effectively complete mental tasks, aside from a slight dip in planning skills during the workout. And they were able to log an average of 4,500 more steps per day during their sessions.

Let's cover the original misinformation first: The earliest missives warned that microwaved plastic releases cancer-causing chemicals called dioxins into food. The problem with that warning is that plastics don't contain dioxins. They are created when garbage, plastics, metals, wood, and other materials are burned. As long as you don't burn your food in a microwave, you aren't exposing yourself to dioxins.

Migrating chemicals

There's no single substance called "plastic." That term covers many materials made from an array of organic and inorganic compounds. Substances are often added to plastic to help shape or stabilize it. Two of these plasticizers are

Ask the doctors

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Q. I've been trying to avoid high-fructose corn syrup. Is table sugar a healthier alternative?

A. Wouldn't it be nice if there were a healthy sugar that you could eat guilt-free? Unfortunately, when it comes to high-fructose corn syrup and table sugar, there really isn't a "good" option. High-fructose corn syrup and table sugar are actually pretty similar from a chemical standpoint.