TEDxPennQuarter - Christopher McDougall
19:12
TEDxPhoenixville - Christoper McDougall - Barefoot Running
15:22
Barefoot running: Dave Thompson at TEDxBelfast
18:03
From couch to ultra marathon: Bill Hoffman at TEDxAlbany 2013
12:58
The science behind dramatically better conversations | Charles Duhigg | TEDxManchester
16:20
The runner's low - depression & the badwater ultra marathon: Hannah Roberts at TEDxHonolulu
17:49
Everything is Connected -- Here's How: | Tom Chi | TEDxTaipei
9:13
What if age is just a state of mind? | Bruce Grierson | TEDxPSU
13:14