Fitness basics
Learning Center
Arcus senilis: A sign of high cholesterol?
With this condition, older adults develop a gray arc around the cornea of the eyes.
Loss of taste and smell: Natural with aging?
Aging can play a role in the loss of taste and smell — but not always.
Low blood sodium in older adults: A concern?
For older adults, low blood sodium, known as hyponatremia, can cause death if left untreated.
Did the definition of Alzheimer's disease change?
What the change in the research definition of Alzheimer's disease means for you.
What is a heart failure action plan?
Know when new heart failure symptoms require a call to a healthcare professional or an ER visit. An action plan can guide self-care.
Heart failure and sex: Is it safe?
Many people with heart failure worry that sex might harm their hearts. How do you know when sex is OK? Cardiac rehab and counseling can help.
How do COVID-19 antibody tests differ from diagnostic tests?
Antibody testing shows whether you've had the COVID-19 virus in the past. It's not the same as testing to see whether you have the virus now.
COVID-19 variants: What's the concern?
The virus that causes COVID-19 has changed over time, which has affected prevention, diagnosis and treatment of COVID-19.
Male masturbation: Does frequency affect male fertility?
Male masturbation has little effect on sperm count or quality.
Can vitamin D protect against coronavirus disease 2019 (COVID-19)?
Find out what the research says about links between this key vitamin and the widespread viral infection.
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