How heat and humidity affecte my HR.
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334 days
kxux posted 45 weeks ago.
Generally the high temperature and high humidity lead to higher heart rate and in many cases while the pace / power output is lower than on the ideal day. According to literature it is mostly because your body is not able to cool down as efficiently as in cooler / less humid temperature. Case in point - had two weekends of 2 hours runs - last week was nice and cool so I did like 14.5 miles at around 9:00 min/mi, today was hot and humid and I did the very same route (almost - had to cut it short towards the end) - did 12.5 miles and had to resort to few walking breaks. Moreover I ran out of water on mile 9 so the rest was really bad and I felt very sluggish. And my average pace was 9:30 for 12.5 miles. The differece? Last week was 65 no humidity, today it was 85 when I left the house and the humidity was quite high. I do not know how high, but yesterday when I did my long ride, the humidity condensated on my glasses and I had to wipe them clean every 10 minutes (for over 4 hours) - talk about fun. Anyways the point I'm trying to make is that the heart rate reacts to many things:
1. Temperature
2. Humidity
3. Your position - e.g. swim, bike or run
4. Altitude
5. Drugs - did you ever try running while finishing the antibiotics? If so you know what I'm talking about
6. How tired you are and sometimes even your psychology plays a big role
I bet there are others...
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Red5 posted 45 weeks ago.
I usually see an increase in HR of about 5-10bpm for the same preceived effort. Your body is having to use additional energy to keep cool, so although your legs are syaing where's the effort? your heart is saying no mas!
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Bryan
Of course it's 'effing hard, it's IRONMAN!
695
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1266 days
Star posted 45 weeks ago.
Red5 and I train in similar heat conditions, though I may face more humidity. His advice to me, though its tough to follow when you're in IM training, is to slow down and keep your heart rate low. Its a difficult task when its hot and humid. Stay hydrated and use electrolyte replacement. As for the race...if its hot and humid that day, everyone will have to face it...just be the smarter one ;)
My blog: http://star.trifuel.net
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750 days
Red5 posted 45 weeks ago.
Right and that came from my coach when I challenged him on this issue. He said your heart only knows what it's doing, and if it's going to fast it is altering your respiration. Now, he also advises whenever possible, try and get workouts, especially key sessions, in the early morning to improve their quality.
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Bryan
Of course it's 'effing hard, it's IRONMAN!
357
Member
749 days
kkocan posted 45 weeks ago.
Such is the joy of living in PA in July-August.
1 day is 90 and major humidity, the next it's 70 and brisk. Heck, the day before it got real hot and humid last week my furnace kicked in.
I just thought it was neat how it worked out that I did the same workout twice within 5 days and the differences on the performance each day because of major differences in temp/humidity.
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2008 Main Races:
VA Beach Shamrock Marathon
Desoto TTT
WV Mountaineer HIM
IM Wisconsin
379
Member
359 days
stewarba posted 45 weeks ago.
I'm not a big heart rate monitoring kind of person, but this past week I can relate. Living in the Charleston SC area, we have been pounded with high temps and high humidity for the past 6-8 weeks - you just get used to it. Its great to go to bed at 10PM and see that it is still 85 degrees outside. Last week I was on business travel to Southern Maryland and went running a couple of times. Temps in the 70s and I swear my run pace was 45 seconds faster per mile! I can't wait for fall to get here!
Goals in writing are dreams with deadlines – Brian Tracy
2008 Sprint Tri A race goals
S: 500m in 10:00 – FS Stroke only
B: 22mph avg over course
R: 5K <= 25:00
Place top 50% for my age group
695
Member
1266 days
Star posted 44 weeks ago.
...but is there anything gained by training with such a high heart rate? Red? I ran 8 miles on Saturday with an average heart rate up in the high 160's to 170 :eek: because its sooo hot and humid (everyone I'm talking to here is really struggling right now), and on Sunday ran 14 miles in the high 160's for the last 7-miles. Are there any advantages training with such a high heart rate, or am I just asking for trouble?
My blog: http://star.trifuel.net
I had two identical brick workouts scheduled this last week. Both were 1:40 bike with a 20 min run, both bike and run in zone 2. Nothing hard, just time to spend leading up to IMoo.
It was interesting as I did the identical route for both workouts, and did them at about the same time of day. The only difference was the temperature/humidity.
The bike course I did was a 33+ mile course with rolling hills and 3 significant climbs (in the granny gears spinning 7-8 mph up the big hills). About 1,600 feet climbing total.
Following are the results of both workouts:
Brick #1, Thursday
Temp 85, Dewpoint was in the mid 70's. It was OPPRESSIVE out that day.
Bike 33 miles, avg 19.3mph, avg HR 153 bpm (zone 2 for my bike is 149-159)
Run 2.15 miles @ 8:11 min/mile pace, avg HR 168 bpm (Z-2 for my run is 161-170).
Overall the perceived exertion for this ride was really low. Any time I tried to push at all the HR jumped up, especially on the bike. The humidity was brutal out that day. I kept looking at my speed on the bike and my high HR and felt I should be going a lot faster, but every time I pushed I went into zone 3 so I backed off. Same for the run.
Brick #2, Sunday
Temp was 77, but the humidity was way down. Very COMFORTABLE day.
Bike 33 miles, avg 20.2 mph, avg HR 148.
Run 2.15 miles @ 7:12 min/mile pace, avg HR 160 (top of zone 1 avg).
Perceived exertion was right where it should have been for the speeds/efforts I was putting out. Felt especially smooth on the run, actually was having to 'push' to keep hr in zone 2. Ended up faster on both bike and run, especially the run, and on both bike and run HR was lower. In fact I avgd top of zone 1 for both!
I'm sure there were other factors at play (diet, fatigue from other workouts etc...) but I'm pretty confident the temp/humidity were the main culprits and it shows how much they can affect your HR and what it is like to exercise in extreme conditions. I don't mind the heat, but I just hope it's not that humid at IMoo.!
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2008 Main Races:
VA Beach Shamrock Marathon
Desoto TTT
WV Mountaineer HIM
IM Wisconsin