Harvard Health Content API

Science continues to find that people with an optimistic outlook enjoy healthier and longer lives. The power of optimism is not just having a sunny disposition, but applying this mindset to make positive change. Even if people are not naturally optimistic, there are ways to change one’s outlook, such as looking for opportunities during trying times, focusing on personal strengths, practicing gratitude, and visualizing their best possible self.

Five blood tests beyond basic blood work may be worth pursuing for older adults. For example, a test to determine one’s vitamin B₁₂ level might be helpful, since older adults sometimes have trouble absorbing that vitamin. Likewise, older adults have less ability to absorb sunlight through the skin, which may lead to less production of vitamin D. Other blood tests to consider include those for HIV or hepatitis C infection, and a test to measure fasting blood sugar.

A review published online March 17, 2021, by the British Journal of Sports Medicine found that fitness trackers helped overweight or obese people with chronic conditions reduce body weight and body mass index.

A Harvard study published online March 29, 2021, by JAMA Network Open found that people who looked up health symptoms online were able to correctly diagnosis a condition about half the time.

A small, randomized trial published online April 6, 2021, by JAMA found that people who took part in a high-intensity walking program for one year covered more ground in six minutes than people who’d taken part in a low-intensity walking program.

Scientists are studying whether medical detection dogs can sniff out and identify disease in humans, such as cancer, infection, and Parkinson’s disease. Dogs might be useful because their noses have 60 times the number of scent receptors as human noses; that might make dogs able to detect scents given off by bacteria or diseased human cells. But it’s hard to get solid evidence about the accuracy of medical detection dogs. Scientists are also studying whether technology can replicate the same kind of detection.

Some older adults feel cold frequently. This may result from age-related physical changes or an underlying condition. Examples of underlying conditions that might make a person feel cold include anemia, an underactive thyroid, diabetic neuropathy, peripheral artery disease, or Raynaud’s phenomenon. People who experience coldness that interferes with their daily activities or sleep should talk to a doctor about it.

The immune system sometimes launches a chronic inflammatory response in certain joints. That leads to pain, stiffness, and joint damage known as inflammatory arthritis. It’s usually unknown what triggers the conditions. Types of inflammatory arthritis include rheumatoid arthritis, gout, and psoriatic arthritis. Treatments include medications, such as biologic or nonbiologic disease-modifying antirheumatic drugs (DMARDs), and lifestyle habits, such as exercising, avoiding processed foods, reducing stress, not smoking, and getting enough sleep. Wearing a splint or brace on affected joints and seeking physical therapy may also help ease pain.