Bike Forums

Bike Forums (
-   General Cycling Discussion (
-   -   I'm no Stuart O'Grady (

threadend 07-11-02 06:16 PM

I'm no Stuart O'Grady
While O'Grady's heart is giving him cause for concern by racing at 235 BPM, my heart rate has given me something different to think about.

I'm not on any meds, not even for recreational reasons ;) . My speed, cadence and distance does not varying greatly for similar workouts, those numbers are up a little if anything, but my heart rate is just not going up into the zone I have targeted for a given workout. This has come on rather suddenly over the last week to 10 days.

Any guesses or ideas if this might be related to old age, improved conditioning, a stale workout routine or something all together different?

Chris L 07-11-02 09:08 PM


Originally posted by threadend
Any guesses or ideas if this might be related to old age, improved conditioning, a stale workout routine or something all together different?
I'm no expert here, but I'm thinking more along the lines of the stale workout thing. One way to check would be to find somewhere new to ride and see what happens.

Richard Cranium 07-12-02 06:37 AM

Who, knows, but at least your toes are comfortable.

Unless you have an ergometer, there's no way to relate your heartrate to a given effort accurately.

Try some, fully rested, empty stomach intervals and see what happens.

RainmanP 07-12-02 07:36 AM

You don't say what cadence/gear combo you are using. If you try to push too big a gear your legs will fatigue long before your HR gets high enough. HR is a cardiovascular measure. You need to use an easy gear and spin it fast to get your HR up. If you are used to pushing big gears slowly, the gear you should be in will feel ridiculously low and wimpy, but that is the point. It SHOULD be easy for your legs so they can do it for a long time. Spinning lower gears faster produces more power for the effort expended. Going the same speed, say 17-18 in a big gear may feel hard, but it is just your legs feeling it; you may not even be breathing too hard. Doing the same speed in an easy gear at 90-100 will get the heart and lungs involved. You will be breathing harder, but your legs will last longer.

OK, all fine and good, Rainman, but what gear are we talking here? Obviously it depends on your particular fitness level, but I will try to give you some benchmarks. When I first started working on cadence, the most I could consistently pedal 90 was about 39/21 (54 inch gear). Now I've gotten a little stronger, and 39/17 (62 inch gear)feels like 39/21 used to. If you have a triple, 42/19 (60 inches) is close to 39/17. You may be much stronger than I. To calculate gear inches:

Teeth on chainring divided by teeth on cog times wheel diameter in inches (for 700c use 27 inches).

Regardless of what specific gears are involved, gear inches is a consistent measure of effort, ie 62 inches feels the same whether you are using 39/17 or 48/21.

threadend 07-13-02 11:36 AM

Thanks for the input, could be alot of things I guess but it looks like things are returning to normal. I just returned from my Saturday "test" ride and was able to push and maintain 86 1/2% of MHR for two hours.

My target for this particular ride is to warm up for 15 minutes, ride at the highest sustainable pace (90-100 RPM @ 85 - 90 percent of max.) for 1 - 2 hours and then cool down for 15 minutes. My average speed was down 1/2 MPH from last week, but last weeks work section of the ride was only 1 hour.

All times are GMT -6. The time now is 04:37 PM.