- Why can't I get my heart rate up on the turbo trainer?
Having recently started introducing high intensity intervals into my training plan, I’ve hit a weird issue with the turbo trainer. I’m meant to be aiming for intervals of 4 mins @ 170bpm, but I really struggle to get my HR above about 150bpm before my legs blow up. Thing is, it’s not like I feel particularly tired or anything & I could quite happily go out for a fast ride and I bet I could get my HR above that in no time. There’s something about being on the turbo trainer that’s causing me a problem.
I’m finding I need to put the bike in a big gear on the turbo to get my heart rate above 130 ish, but then my legs get really tired by the time I hit about 150. I’m not massively out of breath or anything, just tired legs because of the big gear I’m trying to push. Problem is, if I drop the gear then my HR drops down even lower, even with a high cadence. One issue might be that I can’t get out of the saddle on the turbo as the bike just lifts off the roller, but I think it’s more than that.
Any thoughts? Cheers.Posted 8 years agooldgitMember
Sounds lack a lack of warm up. I find it easier to reach the desired higher rates after 1/2 hour.
And please don’t be offended by this, but have you selected a programe your not quite ready for?
Just had a session today, with 3 x 9 minutes at 165 but found I was having to ease off to stay that low which suggests I may have picked one that is a bit too easy?Posted 8 years agoMunqe-chickMember
Mark, as you know I’ve borrowed a turbo to stop the rot. Mine uses a fan, and I was surprised how little resistance there is. At my normal cadence even in top in road gearing my heart rate isn’t in the cardiovascular training zone, so playing at intervals if I really spin it up I can just hit 160. I’m much less fit than you and prob most posters so it must be technique and high cadence, or more sophisticated trainers?Posted 8 years agobig_n_daftMember
this is why you use one of the turbo’s that give power readings, heart rate is too suscepable to other factor’s
Tacx flow is the most basic and does the job well
flow – Member
If its a magnetic trainer it probably can’t generate enough resistance.
depends on the model, Tacx Swing (Mag trainer) can definitely generate enough resistancePosted 8 years ago
As you’re finding heart rate is a lagging indicator of effort and practically useless for short intervals. In an attempt to get your HR up quickly you are going too hard and blowing up before the end of the interval. It can take my HR 10 mins to rise and stabilise on a 20 min interval even after a good warm up. That’s why more and more people who train seriously and can afford to do so get a power meter.
I suggest you ignore HR and go on perceived effort. For a 4 min interval I guess your training plan is calling for something like 17 or 18 on the Borg scale of perceived exertion (20 being eyeballs out total maximum, 6-7 being very light) Stick a speedo on your back wheel. If you have a fluid trainer or if you make sure you use the same resistance setting on a mag trainer then your speed will correlate to power and as you improve you’ll see yourself going faster and therefore generating more power for the same effort.Posted 8 years ago
Cheers all. The turbo trainer is one of these, so shouldn’t be the problem I think. The chap who does my training plans has suggested I do a slow ramp up of effort & see if that helps. Also reckons I might be putting in too much effort at the start of the interval so my legs blow before HR has a chance to get up to the correct level. Sounds sensible I suppose. The more I train with HR, the more I realise just how unreliable & slow to react it can be. Might have to invest in a TT with power reading if I can’t get along with this one.
Dave, hope you’re recovering well mate. Bet you’re looking forward to getting out again! Oldgit, no offense taken…valid suggestion but I don’t think that’s the issue. Cheers.Posted 8 years ago
Cheers, sounds like that’s the most likely issue then. My max HR is 182 (I’ve only ever achieved that in the lab!), so 4 x 4 mins at 170 is a pretty hard session. I’m certainly putting the hammer down when the interval starts, and in a big gear I suppose it’s not surprising my legs fold after a minute or two. Speedo sounds like a good idea, cheers.Posted 8 years ago
Give the rear wheel speedo a good try before you go splashing out on a turbo with power measurement. Like Russell says you will soon get a good feel of the speed to suffering correlation and be able to pace yourself better.
If you go down the power route it would be best to get a Powertap or similar on your bike so you can use it on the road- it will also be more accurate than a turbo power meter.
Edit: from your max HR it definitely sounds like you need to be 17-18 on the Borg scalePosted 8 years ago
Brilliant you have a Garmin, then use Garmin Connect or Sporttracks to save your sessions. Then you can remind yourself how fast you went on a previous session and also superimpose the same sessions (with a suitable Sportracks plugin) and see how you’re improving.Posted 8 years agoDenDennisMember
Pedalhead- my tuppenceworth-
I’d say deffo do a turbo mid-easy warm up for a least 10 mins before doing whatever training plan/interval sessions.
I have a tacx flow with power & cadence. I’m sure the power measurement is not accurrate in absolute terms but it will be relatively between sessions. for a partic gear+ constant cadence you obviously have the equivalent power output as you would for speed+gear.Posted 8 years ago
I can set the Flow to maintain a constant power as it automatically ups the resistance if you drop the cadence- this is really noticeable.
FWIW (I’m not very fit at all) but if I do intervals with the ‘effort’ part trying to maintain at least 120rpm, this gets my HR way up pretty quick.
OR try tabata intervals- if you can’t max out on those by the 8th then you’d need a harder gear/turbo!
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