So finally returned home from my holiday so I’ve been able to upload my VLM run to Garmin Connect and check out those all important stats!
Pleased to see my new 910XT has got the closest to actual race distance compared to any of my previous runs around the city clocking a 26.29
Generally pretty happy with the pacing, had the Garmin set to manual lap count so I could click off the miles as I went through the mile markers. (Missed mile 15 so had to do a “double click”)
The general slowing from about 20 miles onwards is pretty obvious with the worst mile being 25. ( It came out long as I think I was early with 24 but even so it was around 5:30-5:35 I believe )
Some of this slowing I can blame on the westerly wind that hit us as we came out of Canary Wharf but if I’m being honest a lot of it was to do with the fact that my legs were pretty much done by 20 miles and I was hanging on for dear life!
As mentioned in my race report, aerobically I was feeling very strong and this is backed up by my HR stats. For most of the first half my HR gradually built up to around 163/164bpm and that is where it stayed.This is a few beats less than what I can normally sustain in a marathon (167bpm) but I knew any faster and I would be writing cheques my legs were not going to be able to cash.
As the general fatigue and pain started to hit the legs my HR actually dropped to around 159/160 as even though I felt I had more aerobically I just couldn’t push the legs any harder. In the past I have had issues maintaining a higher HR due to energy levels but this was not the case this time, I still felt I could have given more if the legs were able to cooperate.
This is the first time this has happened to me in a marathon and I have spent some time trying to understand why. I have come to the conclusion (maybe wrongly!) that it may have something to do with my racing/training weight differences for this campaign.
Unlike other years where I have been a lot closer to race weight up to 2 months before the big day,this time I still found myself around a stone too heavy around 5 weeks out.
This means that I actually did most of my key training while “overweight” which explains why some of my key sessions/build-up races were not quite as fast as I’d hoped. The bonus was that when I eventually got down to race weight my heart was obviously benefiting from not having to drag that extra fat around the VLM course giving me that extra aerobic benefit but I don’t think the legs were able to make full use of it as I had not been able to push them hard enough in my key long marathon pace training runs.
So more discipline required,need to get down to race weight a lot earlier in the build up to make sure I get the most out of those key training sessions.
………… so I better go and lose some of that “holiday weight” I just put on