Sleep Archive

Weight-loss surgery is now viewed as a way to both prevent and treat health problems linked to extreme obesity, such as diabetes, heart disease, and sleep apnea. Annually, more than 250,000 Americans undergo bariatric procedures, which can help extend their lives. Weight-loss procedures include sleeve gastrectomy, gastric bypass, and gastric banding, which reduce stomach size and change the way the body absorbs food. The surgery adds to other weight-loss measures such as diet, exercise, and medications.

Food freshness dates rarely mean products are unsafe after the date listed. Refrigerated items usually keep for days to weeks, while canned and boxed goods often keep longer.

The American Heart Association recently revised its checklist for achieving optimal heart health. Adequate sleep was added, and updates were made to previous recommendations for diet, cholesterol and blood sugar measurements, and nicotine exposure.

As men age, many factors affect their energy levels, such as declining muscle mass, unhealthy diet, poor sleep, and increased stress. Addressing these areas are some of the best ways to increase energy levels. Exercise, healthy eating, good sleep, and stress reduction can increase mood-boosting hormones, help the body produce more adenosine triphosphate (the energy-carrying molecules found in cells), and balance blood sugar levels to prevent sudden fatigue, among other benefits.

The American Heart Association added sleep to its list of factors for cardiovascular health. The others are a healthy diet; physical activity; low levels of nicotine exposure; and healthy levels of weight, cholesterol, blood sugar, and blood pressure.

People who meet the recommended physical activity guidelines may experience the same health benefits regardless of whether they spread the exercise out over the week or do it all in one or two days.

Older adults exposed to light while sleeping at night may be more likely to have obesity, high blood pressure, and diabetes compared with adults who sleep in darkness.

Left-handers make up only 10% of the population. Despite some common beliefs, science has yet to show that left-handers have any specific advantages or disadvantages over right-handed people in terms of physical abilities, cognitive health, or longevity.

Many apps support activities that promote emotional well-being. Happiness apps feature affirmations, meditations, or gratitude journals. Exercise apps track daily physical activity or provide workouts. Meditation apps guide users through various kinds of meditation, such as mindfulness or guided imagery. Sleep apps help people track how long they sleep, and offer instruction to improve sleep hygiene—such as going to sleep and waking up at the same time each day, and avoiding food and drinks at certain times.

Harvard Medical School has created a large department dedicated to developing and teaching young scientists about the emerging field of computational medicine. This field uses new mathematical techniques to make sense of the thousands of numbers generated in experiments measuring various molecules. Analyzing such "big data" was once unimaginable. Now, scientists have the tools to do it, and to compare tissue of people with and without a disease to find out which molecules are different.