Age group triathlete Uri from Switzerland is the guest and he asks a wide range of questions related to triathlon.  Uri is a 40 year old triathlete in his first year of racing with plans to do his first Ironman in 2016.

He asks if Ironman racing is good for you, how not to be overly competitive with friends, swim training questions, how much to rely on training data, and more.

Links:

Larry Creswell on long-term affects of endurance training on the heart 

Atrial Fibrillation and endurance sports - One of many articles you can find on this topic.

Tim Ferris interviewing Dilbert creator Scott Adams about goal setting