Afternoon ride in September 2017

Working on my cardio on parts of a hiking trail. Distance in the clip is about 9 km. Uphills are alot steeper than it looks on camera and I really struggled on some sections. According to my Tomtom Spark Cardio, I reached a max pulse of 217 bpm! If you listen closely you can hear my heartbeat :) Recorded with Gopro Hero 5 black and the bike is a 2016 Giant Reign 1.5.