Pacing: 125 mile Ultra Marathon (Devizes to Westminster)

[@brynprice6355]

Great series of posts. Thanks Keith. What do you think about using a HRM to optimise your Effort vs Pace. I have found that I can paddle at a Maximum Heart Rate minus 15% for my usual 20km training sessions, but I'm still learning

[@keithmoule]

Hey, please you are enjoying the posts! I always use a HRM in training but never in the race for ultra marathons. 3 reasons, 1) it's something else that can rub on your skin, so it's a potential hazard. 2) you can get too obsessed with it and try to scale a 2 hour training session to a 20 hour race, it's just unrealistic 3) in ultra marathons you can get heart rate creep, where you HR starts to elevate over time because of the overall stress and fatigue on your body, you can probably still cope ok, but can be a worry if you are used to tracking it over 2 hours or so. By the time to get to the race you'll have a good idea of what feel tough / good, so I would recommend going on feeling for the race and try to not get caught up in the numbers.