A simple way to keep your muscles strong as you get older (and it isn't exercise)
This one step can strengthen aging muscles, boost your immune system, and even help you manage your weight.
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Many societies have, through the years, encouraged sweating. Native American Indians used sweat lodges (and many still do). Northern Europeans developed saunas. I think sweating is one of the healthiest things you can do, whether it's by exercise OR heat.
If you use a sauna, please be careful considering age and physical condition. There are now new wonderful infrared devices that are portable, from domes to mattresses. All of these have value depending on your particular needs. I'll have more on these infrared devices in future issues of Second Opinion. In the meantime, get outside this summer and sweat.