Wahoo Training Metrics FAQ

Hey everyone! There’ve been some questions around the new Wahoo training metrics and I thought it may help to give you some Helga insight. Below I have addressed some of the most frequent questions being asked. If you have any more please ask in the comments!

What is DTL? The simplest explanation for this is that Dimensional Training Load (DTL) is a new and improved way of tracking strain from an activity. The higher the number, the larger the load. Additionally, it shows you the dimensionality of your activity - meaning you can see exactly what 4DP dimension was strained. This is ideal for athletes looking to train in a specific area. It’s also used to calculate fitness score and training capacity. Remember this uses your 4DP as a base so if that’s not accurate, none of the Wahoo metrics will be. I suggest taking a full frontal fitness assessment to get the most accurate results.

Why do I see my Fitness Score dropping when I am ramping up activity? Fitness doesn’t change directions overnight, it changes based on the balance between your training and recovery. Training Capacity is faster to react to changes from one day to the next. Your Fitness Score is a combination of your long term load (your last 6 weeks of training) and your training capacity (how much fatigue the past week of workouts have contributed). So, if you start ramping up activity after a period of less activity, your training capacity will decrease quickly, but your long term load takes more time to build which will lead to the situation where overall fitness is dropping since you are fatigued. This doesn’t mean you are not making progress, in fact, you are! But, you don’t build fitness overnight and these numbers reflect that. As you keep building, resting and recovering you will start to see your fitness score increase.

Why is Wahoo’s fitness score different from other traditional metrics? There’s a lot that’s different but the biggest difference is that it takes into account rest. All athletes understand that rest isn’t optional, it’s required to get fitter and stronger. Traditional metrics equate more work = more fitness, and the moment you take a rest day you get “dinged”. Wahoo metrics account for rest, so during periods of recovering, you are maintaining or even increasing fitness.

How do I interpret my Training Capacity? Treat your training capacity as your readiness to train each day. This number looks at your most recent training and today’s mental capacity to give you a complete understanding of your training readiness. The more in the orange you are the more fatigued you will feel. Remember, being in a fatigued state is not always a bad thing - periods of heavy training and fatigue are needed to build fitness.

I hope this helps! Please comment below for further questions I may not have answered.

Additionally, here are a list of resources that may help inform further:

  1. A walkthrough of Wahoo Cycling Metrics

  2. What is Wahoo’s Dimensional Training Load and Why It’s Different from TSS?

  3. Wahoo Training Metrics Pod

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Thanks for this @Helga :slight_smile:

Some great resources there!

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Really like the updated score representation - much easier to understand, thank you!

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The additional info thinks I overtrained by taking 3 days off but added a strenuous 8 mins of watching “how-to” videos. I think I’ll go have an extra nap.

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@Helga, I really don’t understand the DTL assigned to the Mental Health episodes. If I listen to 4 episodes, I’ll get a similar cumulative DTL as The Cure for plopping my posterior in my recliner? I set the rating to extremely easy.

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The DTL Score seems really low for The Cure even if it’s only 30 mins if I do Recharger and call it sort of easy my DTL is around 60.

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Why? You aren’t comparing apples to apples.

Additionally, I could also have decreased intensity as I’m on my second return to fitness after at least 10 years of injuries and surgeries. You wouldn’t know this. Don’t assume. :grin:

Look at your own DTL for the Mental Health segments and The Cure, and report back.

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Last time I did the cure I got 39TSS and 106.8 DTL. Something seems off with yours.

Can we focus on the DTL assigned to videos while plopped in a chair?

My understanding is that DTL is unique to each person AND unique to each completed workout by that person.

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Well in theory a SYSTM workout that’s structured to your 4DP values should get very similar DTL.

The real thing that can mess this up is cadence. Really low or high cadence could contribute extra DTL.

Even if you deduct the cadence contributors from my DTL we’re still about off by double.

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Yes, I think that non-workouts like the MTP should get some kind of check-box that stops it from calculating DTL.

I agree it’s a problem that you can sit there for 15 minutes just listening to someone talk and get a high DTL simply based on duration.

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Well, my cadence is really wacko. I’ve had a somewhat recent knee replacement and it takes me forever to get it loose and coordinated enough for lots of quick repeated jumps. I then tend to stay at a high cadence and ignore cadence targets because I’m so focused on regaining form. I impulsively jumped into the Tour training plan because I need a goal, and this was the first assigned workout – just after a period of “over-training” under the new metrics. And, most importantly, I frequently reduce intensity significantly to deal with starting mid-plan and all of my current challenges. Sometime, late March I can re-ride The Cure just for comparison.

Right now, I’m far more interested in why there is DTL assigned at all to the Mental Health sessions.

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The time-based thing also causes yoga to distort cumulative DTL. Some yoga workouts clearly wear me out and impact my training, others are restorative and should have a negative DTL. Most are neutral. My HR would be key to differentiating, but that info isn’t captured by SYSTM, although it can be recorded in the app.

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Thank you! I’m so interested in the rationale for this. Hopefully, @Helga or @Rupert can chime in.

Yes, it’ll be helpful once HR is taken into account. Hopefully Wahoo will update the video player to record HR for yoga and strength videos once they update DTL to use it.

Yeah that’s weird.

For everything that’s not cycling with power and cadence, DTL is set based on RPE. (Apparently HR at some point but not yet). Supposedly there’s weighting by activity type - a run and a walk with equal time and RPE should get different DTL, but that’s not working well for me.

I bet the Mental sessions are just activities and get swept up with everything else.

Good luck with your recovery :crossed_fingers::crossed_fingers:

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Thank you! Last doc appointment yesterday for the latest issue. Yahoo, Wahoo.

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Ik train met een hoge cadans, 105 rpm. Daardoor ziet systm het als een zware training wat het dus niet is. En komt een rondje van 40km met een gem. wattage van 232 uit op 208dtl. Wat veel te hoog is voor zo’n training. 32% endure 56% brake away.

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Have you done a 4DP Full Frontal to calibrate your baselines ?

Yessss I have. But that says nothing about rpm.

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