My aim after C25K was to up the speed to manage the 5k in 30 mins. Not quite there yet but have gone from 36 mins to 31.5 mins in the last 8 weeks using the week 2 podcasts to do run/jog intervals.
I'm now plotting my next goal so I make the final hard push to the golden 30 mins sooner rather than later. I'm now thinking I will up the distance to 10k next so I've been looking at some training plans.
So- question is that these plans mention fartlek sessions rather than intervals but what exactly is the difference?