Heart rate training mistakes runners (myself included) make can lead to believing that zone 2 training doesn’t work. I have been running all of my easy runs in zone 2 for my sub-3 in Philly marathon training and have realized…

Thanks to Smith & Bradley for sponsoring this video! Help support my channel by buying your own Smith & Bradley watch using my link – https://bit.ly/3FLyYHy In this episode of Bro Labs, I do an experiment where I test my…