Q&A #11 - Should you use different heart rate zones for swimming, cycling and running?   According to Dr. Phil Maffletone, the aerobic threshold heart rate is the same in all aerobic sports (like swimming, cycling, and running). Is this true?  How the type of athlete you are and your ability and experience in different sports impacts whether your heart rate zones will be similar or not between different sports.  Practical examples from lab tests and research studies showing massive discrepancies in threshold heart rate between sports (we're talking 10-20 bpm differences) The problems with the MAF-formula or 180-formula for aerobic threshold heart rate.   LINKS AND RESOURCES:   That Triathlon Show website  Coaching Training Plans TRANSFERABILITY OF RUNNING AND CYCLING TRAINING ZONES IN TRIATHLETES: IMPLICATIONS FOR STEADY-STATE EXERCISE Article by Phil Maffletone     SPONSORS:   Stac - The Stac Zero is the world's quietest bike trainer. No noise and no tire wear, since it doesn't even touch the tire! It is also very portable and affordable. Even more so when using the discount code THATTRIATHLONSHOW for 20% off when you buy your Stac bike trainer (any of the models).     ROKA - The finest triathlon wetsuits, apparel, equipment, and eyewear on the planet. Trusted by Javier Gómez, Gwen Jorgensen, Flora Duffy, Mario Mola, Lucy Charles and others. Now shipping directly from the UK and EU. Get 20% off your entire order with the discount code THATTRIATHLONSHOW.      RATE AND REVIEW: If you enjoy the show, please help me out by subscribing, rating and reviewing.      CONTACT: Want to send feedback, questions or just chat? Email me at mikael@scientifictriathlon.com or connect on Twitter - my handle is @SciTriat.