Whether you're enjoying a session in the home gym, local park or somewhere a little more commercial; make sure you're wearing one of these.
There’s a great piece over on The Science of Sport which looks at the relationship between running and heart attacks. Bottom line - despite recent events (such as the experience of Alberto Salazar and the tragic death of Mike Long), running is very beneficial indeed.

"Sonnon is without doubt one of the top conditioning coaches in the US, the thinking man's coach. He is the hologram man. Try and hit him and he disappears."
- Pavel Tsatsouline
Are you ready for Tacfit?
A few others you might like :
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