My running history is very limited, I did a relay duathlon with my wife a few years back (2016, so it's been a bit) and I did the run legs, and I did 22:29 and 23:18, completely untrained. According to that power estimator it was 245w, I think my bike power was better at the time. Might be interesting to focus on some run training to see if I can get 19min, which is estimated 290w. There are a couple of duathlons in my hometown area that would be fun to compete in, but I'd hate to risk any chance of running injuries