I’m a bit impatient and cycle regularly so I started at W3. I’ve go a nice off road route or a park to run round. W3 was fine. I run very slowly. W4 trickier beacause I went on holiday but luckily the holiday flat was very close to a park.
My challenge is that I have a knee replacement so have to take this very gently. The first sign of pain and I have to stop.
One of my motivators is a fancy Garmin watch that measures and calculates all manner of measurements and stats The wonders of VO2 max