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Is "bouncing" caused by saddle height or technique?(7 posts)

Is "bouncing" caused by saddle height or technique?vindicator
Jan 6, 2003 11:26 AM
I've now done a few sessions on the rollers I got for Christmas. I've been cycling overall since July, so I'm still a novice.

I've tried some high-rev intervals on the rollers and I notice that I start bouncing somewhere around 105 rpm or so. I don't THINK my hips are "rocking" as is often mentioned when saddles are too high - it's more a bouncing straight up and down.

Can anyone confirm or deny my assumption that the cure for this is smoother pedal technique?

Any suggestions on drills to cure it? Rollers at just below bounce threshold or something else?

Thanks,

Dave
Smoother pedalling technique will helpduckstrap
Jan 6, 2003 11:41 AM
You probably want to just keep after it doing more or less what you're already doing. Pedal for short intervals--1-3 min as fast as you can without bouncing and repeat a few times during the workout. Pedal circles and concentrate on relaxing your toes. Works for me!
DependsFez
Jan 6, 2003 11:48 AM
Have a buddy ride behind you on the road or have a buddy observe your technique while you are on the rollers.

I have seen a few riders whose hips bounce up and down, but their upper body is relatively stable. My guess was they were concentrating too much on the down and up motion and not enough on spinning smooth circles. A higher cadence just exacerbated the bouncing for them.
BothLC
Jan 6, 2003 11:57 AM
Too high a saddle can cause it, as well as going above your practiced RPM's.

If your hips are not rocking for normal pedaling, then it is just a matter of practice and it could take several months to perfect.

There is a quicker way though. Fixed gear riding is a quick way to become good at a fast spin, but you can do it on a normal bike as well. Set out on a ride with the idea that you got 5 minutes to find your one gear that you have to do the rest of the ride without touching your shifters any more. Keep in mind that your chosen gear is going to have to get up and down any hill you might encounter or wind in your face. You should be spinning pretty high on the flats and really high down hills. It will force your legs to adjust to the bike and will be very hard to do at first so do shorter rides till you adjust to it.
BothPEDDLEFOOT
Jan 6, 2003 12:08 PM
I love that drill.I do it about once a week .Usually for my easy ride.It's alot of fun and the reason I'm seriously thinking of building a one speed.It also works great.
or....Fredrico
Jan 6, 2003 11:59 AM
Lower the saddle a half inch and see if the bounce goes away. Then, raise the saddle by 2cm. increments, and see when the bounce re-appears. Lower it back to where there was no bounce, and work on your spin. Seems like doing this on the road would be a bit safer than on the rollers!

On the other hand, most new riders would start bouncing around 105 rpm. It takes years to develope a fluid pedal stroke, even with the saddle at the optimum height.

Rollers will always amplify pedaling jerkiness. That's a big advantage of rollers over stationary trainers: they teach smooth pedaling technique. Otherwise you bounce right off the rollers!

Fredrico
re: Is "bouncing" caused by saddle height or techniquelaffeaux
Jan 6, 2003 12:17 PM
For me it's caused by pedaling at a high cadence with not enough pedal resistance. I notice it more on my MTB where the terrain transitions faster. When I am in a gear that is to easy to spin, and I'm spinning as fast as I can, I get the same up and down bobbing feeling. Usually shifting into a gear that is a bit hearder clears it up.