Originally Posted by
Iride01
You might need to re-phrase that. Or are you really implying that any of us non trained non athletes risk a heart attack if we go over zone two. None of my cardiologist say there is anything wrong with me staying in the upper zones for as long as I care to or am able to.
Might not be good training strategy. But it's not risking a heart attack for anyone that is otherwise healthy.
Nope, it's perfectly phrased like that... "all out effort" is quite clear. Something like zone 5, nothing like just "go over zone 2".