Danny Huibregtse from The Netherlands, improved his marathon times from a 3:59 to a 2:34, using heart rate training. In his last marathon alone he ran a 34 minute PB from 3:08 down to 2:34, that’s incredible!!    We discuss his approach to training and racing, how he improved so much and recommendations for other athletes looking to improve.    Danny and I first connected the summer of 2019. Danny has been a part of our Personal Best Training Program and it has been really exciting to follow his training and racing progress over time.    Our Personal Best Program is a running coaching program and we often focus on MAF low heart rate training and race day strategies. To learn more, check out PBprogram.com   I hope you enjoy my conversation with Danny Huibregtse.    Full video of this conversation is on YouTube: https://youtu.be/dW2cK6r7UoA  FIND DANNY HERE: ► Strava - https://www.strava.com/athletes/39154584 ► His 2:34 PB on Strava - https://bit.ly/danny-PB-strava   YOU CAN FIND ME, FLORIS GIERMAN HERE: ► Personal Best Program: https://www.pbprogram.com ► Website: https://extramilest.com ► Strava: https://www.strava.com/athletes/1329785 ► Instagram: https://www.instagram.com/florisgierman ► Podcast: https://extramilest.com/podcast    SHOW NOTES 0:00 intro Danny 3:55 Danny's running background 6:18 His first marathon in 2008 at age 18 10:25 Pilot training, minimal running 11:55 3rd marathon, still bonking bad 14:10 MAF training experience 15:25 Chi-Running 19:05 Overcoming challenges MAF training 23:05 Changes in nutrition approach 28:00 His first sub 3 marathon goal mindset 31:25 Speedwork after base building 34:25 From 3:38 to 3:08 marathon improvement 36.30 Mindset limiting factor 37:20 From 3:08 to 2:34 marathon improvement 37:55 Training volume 40:55 Tapering for the big Rotterdam dam 43:25 Race day recap 52:05 Any concerns about blowing up? 54:05 The feeling of finishing in 2:34, a 34 minute PB 56:05 Energy management throughout a race 58:55 Nasal breathing  1:01:35 Importance of thinking big 1:05:53 Recommendations to improve   BOOK MENTIONED: Big Book of Endurance Training and Racing by Dr Phil Maffetone: https://amzn.to/2WAcfbT