I completed the third run of week three this morning but found it absolutely knackering to reach the 3 minute mark however I did try to push myself on the last 3 minute run and like to think I managed 4 minutes (I don't carry a timing device) but man oh man am I feeling it now.
This is kinda putting me off starting W4 on Saturday and thinking I should perhaps squeeze another W3 run in on Saturday and start W4 when I feel more confident...
Or should I just throw caution to the wind and attempt it?
I'd say go for it. If you then find it IS too difficult, you can revert to W3. But you could get a pleasant surprise xxx