Running mostly on roads tends to increase it ;)
Chasing/being chased by someone helps too. Sorry I had to quit the course early and leave you to finish it all alone Alex :P
Good run...I'd be curious to see the details...Michael Raz setup a routegadget...if you have a few minutes add your track it would be cool to see you and Tommy I head to head (score vs classic)...see my Sunday log / email for link