Zone 3
This is 80 or 90 per cent of your max effort — not all out, but challenging. It’s comfortably hard: you should be able to manage small sentences. This might be an interval lasting two or three minutes.
This is 80 or 90 per cent of your max effort — not all out, but challenging. It’s comfortably hard: you should be able to manage small sentences. This might be an interval lasting two or three minutes.