Any tips for mustering the energy to go from fast walking to running?

Have someone skinnier and faster chase you with a chainsaw.

actually fast walking is much more effective.

Meth

@SBelle
@Signmeupforthat
Thanks, I know you are right. But I wanna be thin! And fast!

I always stuck with the fast walking, I had no desire to run. :-)

add lots of water

c25k program. there's likely one available for your phone.

@Malcontent - Thanks for tip, I will look into

Oh if am running it is cause something is chasing me.