From a Wall Street Journal article (March 21, 2020):
As we age, our balance declines, says Dani Johnson, a physical therapist with the Mayo Clinic’s Healthy Living Program in Rochester, Minn. Implementing balance exercises as simple as standing on one leg as you brush your teeth can help prevent falls. Getting a daily dose of cardio can boost the immune system.
This at-home circuit routine will get your heart rate up while also challenging strength and balance. Perform the circuit three times. Walk up and down steps or march in place for two to three minutes between sets. To up the effort, she suggests adding dumbbells or improvising with cans or tube socks filled with coins or rice.
Chair squats
Stand in front of a chair with your feet shoulder-width apart. Bend your knees, lowering your hips back, keeping weight in your heels and your chest upright. Start by sitting into the chair and standing back up 10 to 12 times. If this is easy, hover above the chair then return to standing.
Counter push-ups
Place your hands on the edge of a counter, just beyond shoulder-width apart. Lower into a push-up then press back up. Repeat 10 to 12 times. For more of a challenge, walk your feet farther away from the counter.
Chair triceps dips
Sit upright in a chair with your hands on the armrests, elbows bent at 90 degrees. Straighten your arms, lifting your body off the chair. Hold briefly. Then lower yourself down. Use your legs to balance. Repeat 10 to 12 times.
Calf raises
Begin in a standing position. Rise up onto your toes, hold briefly, then lower back down. Repeat 10 to 12 times. Place one or both hands on a table or chair for more support. For an added challenge, perform on one leg at a time.
“These results are exciting, as they suggest that people may potentially prevent brain shrinking and the effects of aging on the brain simply by becoming more active,” said study author Yian Gu, Ph.D., of Columbia University in New York and a member of the American Academy of Neurology.
Eat less, live longer- If you want to reduce levels of inflammation throughout your body, delay the onset of age-related diseases and live longer—eat less food. That’s the conclusion of a new study by scientists from the US and China that provides the most detailed report to date of the cellular effects of a calorie-restricted diet in rats. 
Well, when you get older, you are more fabulous, actually. You go through a lot of hard times in your life… and then, at this stage you get out of those bad situations quicker and they are less painful. You figure them out, and you move on. And I’m having the best time ever. I’m 71 now, it’s the best time ever, and I think at 81 it will be great. My mom [had] her best times when she was in her 90s. So I look forward to that.
Challenging widely held assumptions about the diminishing abilities of an ageing brain, leading neuroscientist Daniel Levitin argues that we should view getting older as a beneficial experience rather than a form of cognitive entropy. Persuasively argued and consistently surprising, The Changing Mind will alter your perception of the relationship between age and intellect.
And what if older neurons were replaced wholesale with new stem cells? They might scramble different sectors of the brain by destroying the new connections between the originals. Fiddle with those, and who knew what mayhem might follow? Memories, learning, and other cerebral functions that the brain had grown accustomed to might simply vanish. On the other hand, in the case of a disease like Alzheimer’s, maybe new memories would be better than no memories at all.
• For many devices, adoption among adults ages 50 and older is comparable to younger generations. Adults ages 50
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