Cross training is always a fruitful topic & one we haven't really explored together on this podcast. Michael makes his arguments for why cycling & swimming are really optimal cross training options for the serious runner. 
We also discuss the longterm potential of this podcast, take a listener's recommendations really seriously & ask any of our consistently listeners to chime in on requested topic suggestions. 
This one is for all our dedicated listeners. Godspeed, my friends, godspeed.