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Being aero causes HR to jump?
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 2009-07-29 12:02 AM |
New user  9 Arlington, TX |  Subject: Being aero causes HR to jump?I got a tri bike a few weeks ago and have been taking it on some 20-25 mile rides to get used to it. On my favorite 20 mile loop, on my road bike at a given perceived effort, I maintain 150-155 bpm. Same route on the tri bike, while riding upright I maintain, generally, the same HR... but when I get on the aero bars my HR will increase to ~165-170. When I go aero the perceived effort is the same, but it soon becomes apparent that it's not the same workload as my HR climbs (if that makes any sense) At first I thought the only difference was that when in the aero bars I hit a slightly bigger gear because the slower cadence feels better when aero, but I realized that even sticking w/ the same gear, my HR will jump just going from upright to aero. Is this something I need to just adjust to and learn to deal with or am I missing something? - Matt Edited by Strychnine 2009-07-29 12:08 AM |
| 2009-07-29 12:14 AM in reply to: #2314291 |
Champion 7233    | Subject: RE: Being aero causes HR to jump? if riding in the aerobars is something new to you, a few things may be going on 1- good chance you are more cramped up than on the road bike, causes chest restritction, HR jump 2- you are getting excited;-) 3-cadence going up? |
| 2009-07-29 8:17 AM in reply to: #2314291 |
Extreme Veteran 574 Crossville, TN | Subject: RE: Being aero causes HR to jump? I have a lot of trouble getting my heart rate monitor to register while in the aero position. Maybe tighten the chest strap? You may be constricting your diaphram in the aero position more than upright position. |
| 2009-07-29 9:03 AM in reply to: #2314291 |
| Lafayette, CO | Subject: RE: Being aero causes HR to jump? Aero position can change your breathing if you're not set up right which can in turn jump your heart rate. |
| 2009-07-29 10:40 AM in reply to: #2314291 |
Veteran 143 Longview | Subject: RE: Being aero causes HR to jump? I had this problem and ended up widening the distance between aero just a little and now my HR is actually under what my normal HR is on my road bike. I found that I wasn't getting enough oxygen because my arms were too close together. |
| 2009-07-29 10:41 AM in reply to: #2314291 |
Veteran 143 Longview | Subject: RE: Being aero causes HR to jump? By the way are you Tito Ortiz???? Your picture looks like it. |
| 2009-07-29 10:59 AM in reply to: #2314930 |
New user 9 Arlington, TX | Subject: RE: Being aero causes HR to jump? cacc104 - 2009-07-29 10:40 AM I had this problem and ended up widening the distance between aero just a little and now my HR is actually under what my normal HR is on my road bike. I found that I wasn't getting enough oxygen because my arms were too close together. I have thought since day 1 that my arms were too close together. I have wide shoulders and it definitely takes a bit of a conscious effort to keep my elbows in as tight as my bars are setup for, and after a decent ride I'll have some upper back/shoulder tightness. (But the bars are not adjustable?) Combine that with this: newbz - 2009-07-29 12:14 AM 1- good chance you are more cramped up than on the road bike, causes chest restritction, It sounds like a professional fitting might be in order. newbz - 2009-07-29 12:14 AM 3-cadence going up? I haven't picked up a second cadence unit for my Garmin for this bike, but doing a manual count it seems that my comfortable (ie. i dont start rocking my hips or feeling out of control) cadence on the tri bike is around 80, where as my road bike cadence is 90-95. Could this be another fit issue? And no, I am not Tito Ortiz. LOL - Matt Edited by Strychnine 2009-07-29 11:03 AM |
| 2009-07-29 11:03 AM in reply to: #2314988 |
Champion 7233 | Subject: RE: Being aero causes HR to jump? the cadence on its own is not a fit issues (although it could be, but that is not enough to say). in normal training my cadence is much higher on a road bike then a tri bike. normally high 90s on the road, 85ish on the tri bike. in sprint races on the tri bike it goes up quick though. also, my HR (i went back and looked at some power files), goes up about 5 beats when in the aerobars. i am comfortable in them, and have raced this position up to HIM without issues at all. so maybe not as big of an issue as you think, or just a few smaller changes needed to make it a bit easier (widen bars a tad, make sure your hip angle is not too closed). |
| 2009-07-29 12:42 PM in reply to: #2314291 |
| Extreme Veteran 495 Bluffton, SC | Subject: RE: Being aero causes HR to jump? My HR actually drops when in aero so I am not sure what is going on. 5 to 10 beats lower when in aero for the same speed. |
| 2009-07-29 12:48 PM in reply to: #2315266 |
Champion 7233 | Subject: RE: Being aero causes HR to jump? at the same speed in aero you are doing less work, thats why your HR is going down.......... if you were working the same to go the same speed, something is wrong with your position. |
 2009-07-30 11:30 AM in reply to: #2315266 |
| Subject: ... This user's post has been ignored. |
| 2009-07-30 11:45 AM in reply to: #2314291 |
| Champion 7595 Columbia, South Carolina | Subject: RE: Being aero causes HR to jump? I read a study somewhere -- sorry, but I cannot find it now -- that a tighter hip angle (i.e., knees generally closer to your chest) can restrict blood flow to the legs, which can have an effect on heartrate. This is one good reason (or so I read) to achieve your aero position (flat back in particular) by rotating the hips forward, rather than by just leaning over (leaving your hips in their old 'roadie' position). I guess it's possible that this is going on for you, in which case it's a fit/position issue. |
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