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.
Tom Furman points to some great videos demonstrating the Piper System. Great stuff; make sure you also check out A Pointed Truth (the Piper System blog).

"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 :
Leave a comment below, or discuss it in detail in the SttB Facebook Group.