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Before a new medicine reaches patients, it goes through a long series of tests designed to find problems early. Researchers first study how the substance behaves in cells and in animals, looking for obvious harm.
Step goals are popular, but the benefits of walking don't depend on hitting one exact number. Studies generally find that people who walk more each day tend to have better heart health than those who walk very little.
Stretching advice has changed over the years, and the answer depends on the kind of stretch. Dynamic stretches such as leg swings and walking lunges raise body temperature and prepare muscles for movement.
Stem cells are cells that can make copies of themselves and develop into more specialised cells. Some come from early embryos, while adult stem cells live in places like bone marrow and help repair tissue.
Your body clock runs on cues, and a few of them are easy to adjust. Daylight early in the day helps set the clock so you feel sleepy at a sensible time.
Breathing is automatic, but it's also one of the few body systems you can control directly. Heart rate naturally rises a little when you breathe in and falls when you breathe out.
A temperature that is ordinary in one region can be dangerous in another, so warnings are usually local. Many weather services define a heatwave by how far temperatures rise above the usual for that place and time of year.
Most health insurance policies don't cover everything from day one. The waiting period is the time before certain claims are paid. Many policies don't pay for illnesses that start in the first weeks, though accidents are usually covered straight away.
Meal prep means cooking some food in advance so weekday meals take minutes, not hours. Choose a few meals that share ingredients, so one shopping trip covers the week.
Before a major race or match, many athletes deliberately reduce how much they train. It's called tapering. Heavy training builds fitness but also leaves fatigue. Easing off lets that fatigue fade while fitness remains.