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    Racing

    Hanging with the Group Over Gradient Changes

    Eric Schlange
    By Eric Schlange
    December 18, 2018
    LAST UPDATED December 18, 2018
    3

    First, let’s just say it: hanging with the peloton is less intuitive on Zwift than outdoors. Outside you are more aware of other riders, plus you have brakes, steering, and a bike that responds immediately to your pedaling. Most importantly (and this will come up later): everyone is on similar equipment (a bike with gears, directly connected to the ground).

    On Zwift, your position in the pack is determined by the watts you’re putting down, combined with the game’s physics engine and its automatic steering. It takes some time to master riding with a group in this scenario, and it is easy to get dropped suddenly if you’re not paying attention.

    The most common place Zwifters get dropped from a pack is on hills (up and down). This usually happens because the group speed changes unexpectedly (or to put it another way: it isn’t a lack of fitness, but rather a lack of experience or attention.) Let’s look at why this is, and what can be done to fix it.

    First: Climbing 101

    If you’ve done much outdoor riding, you know we tend to push more watts up hills than down. (This may seem obvious, but it’s the root cause of people being dropped from packs on hills, so bear with me!)

    There are various reasons why this happens, including:

    • With less inertia on climbs, you must continually apply power to keep the pedals turning
    • It is easier to generate power in a more upright (climbing) position than a more aero one

    This is why many riders prefer long, steady climbs for FTP tests and power training. And if Merckx says it, you’d better believe it.

    Classic vs Smart Trainers: a Definition

    Classic trainers do not adjust resistance to simulate gradients in Zwift, while smart trainers do. There are other differences between classic and smart trainers, but this is the most important one.

    CycleOps Fluid Classic Trainer
    Tacx Neo Smart Trainer

    One major reason groups break up on the hills of Zwift is because these groups are made up of both classic and smart trainer users. Let’s dig into how this affects our virtual peloton.

    Classy and Smarty Ride Up a Hill

    Imagine two Zwifters riding together on the beautiful roads of Watopia. Zwifter “Classy” is riding a classic trainer, while “Smarty” is riding a smart trainer. What does each of them feel as they transition from a flat road to a climb?

    • Classy doesn’t feel any resistance change
    • Smarty feels increased resistance

    How does this affect each rider’s power output? Based on what I explained above, we know Smarty will automatically begin to put out more power–just like he does outside! Classy, however, will not. If Smarty and Classy do what comes naturally, Smarty will ride away from Classy on the climb.

    But Wait: A Downhill Cometh

    The opposite happens on the downhills, though. Think about it: what do Classy and Smarty feel on a downhill?

    • Classy doesn’t feel any resistance change
    • Smarty feels decreased resistance

    How does this affect each rider’s power output? Smarty will begin to put out less power, while Classy will just keep chugging along. Classy will ride away from Smarty on the descent.

    How Classy and Smarty Ride Together

    So how can we keep Classy and Smarty together? The solution is simple, while actually implementing it may take some getting used to:

    • On climbs, Classy needs to shift to a harder gear and be ready to push more watts to keep up with Smarty. This is counter-intuitive at first, since outside Classy would shift to an easier gear on a climb. But she’ll get used to it.
    • On descents, Smarty should keep pedaling, hammering more than he naturally would, just to keep up with Classy. While Smarty normally takes it easy on downhills, he needs to realize that the pedaling rarely stops on Zwift, and many riders will hammer the downhills just as hard as the flats. Smarty needs to pay special attention at the tops of climbs, where he naturally wants to reduce his power, because this is where he will get dropped by Classy if he doesn’t keep his power up.
    • In group social rides, both Classy and Smarty should pay attention and stick with the ride leader. This will help keep the group together for everyone’s benefit.

    Two Other Tips for Smarty

    Smarty can lower his Trainer Difficult setting to reduce resistance changes. Zwift racers seem to prefer a setting of 20-40% to help reduce the yo-yoing that goes on otherwise.

    If Smarty simply must stop pedaling on a longer descent, he should get up to a good speed (~36MPH or ~58km/hr) then stop pedaling entirely to be taken into the supertuck. He will probably be able to keep up with Classy in this position, even if she’s hammering away on the descent.

    Go Forth and Group Up

    I hope this helps everyone hang with the group on social rides, and stay in the pack on races. Ride on!

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      Eric Schlange
      Eric Schlangehttp://www.zwiftinsider.com
      Eric runs Zwift Insider in his spare time when he isn't on the bike or managing various business interests. He lives in Northern California with his beautiful wife, two kids and dog. Follow on Strava

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