Functional Threshold Power: Does It Really Matter? | GCN Does Science

We've brought in our favourite Genie-us, Professor Louis Passfield, to find out whether functional threshold power, FTP, is actually relevant in determining your fitness.
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Does your FTP only tell you how strong you are for an hour? Or is it still a useful indicator of your overall fitness? Louis Passfield put Si and Blake from GMBN through their paces to find out what their FTP can tell us about their ability, and whether it's lacking at all as a training tool.
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Uppercut 1 - Anders Bothén (1)
Roughness 1 - Anders Bothén
Roughness 2 - Anders Bothén
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Leave us a comment below!

[@corkhead0]

Watching Si and Blake smiling and laughing at each others suffering is the best.

[@chriscolabella880]

We need more Blake and Si. A bit like cycling's odd couple, but it just works.

[@Hardcaslte]

Blake is a damn machine, he almost broke that bike in half during the sprint.

[@maraketty]

1450 watts, that's very nearly the sustained limit of most electrical circuits in the US. :P

[@ChrisCapoccia]

also if Blake has never done an FTP test before, his FTP score could actually rise significantly just by learning how to do the test better, or better pacing

[@LomTong]

Chris Capoccia I was thinking the same regarding the intervals. Blake hasn't done any training of that fashion before, whereas it's a fair bet that it's Si's bread and butter. A lot of it is about practicing and knowing what that 30 seconds should feel like if you wanna be dead by the end of the third one. I reckon ot would have balanced out just fine if Blake had more training experience.

[@waqidj]

Ya if he trains endurance and long tempo. He might hit 300s

[@MDonovan]

First time is not the best time

[@charpsteve36]

Yeah that absolutely how it worked in rowing. You could expect like a 20-30% improvement from your first to second test.

[@mikea6710]

All the points here are, I guess, why ftp doesn't matter as much as we think... Why would you want to cheat for a better ftp? Obviously, if the guy was more conditioned to pro tour fitness, he would do better, but why would you want to have a slick nice prepared ftp vs a pure blind tested ftp rating.. If a liar knew the tricks of passing a lie detector test, and they pass it,.. he is still a liar, right?

[@petinka721]

Louis Passfield is the bike sciences own Hawkins! Great clip GCN!

[@omkarnathmishra2418]

GCN has been my favorite channel in KZbin when it comes to cycling.. I've started riding and touring and the videos have been very helpful in planning these.. Recently I've done a 100 km ride in about 4 hrs.. Big deal for me coj I only used to cycle to my work place.. Now it has grown to be a passion.. Great work with this video as well.. Cheers.. Keep inspiring for a healthier world through cycling..

[@gcn]

Great work, good to hear!

[@omkarnathmishra2418]

Global Cycling Network best wishes from India.. 😊

[@liambarber9036]

Simon, that level of suffering on the 20min is worthy of a Wattage Bazooka!

[@JustAdelaideRacing]

We haven't had wattage bazooka's for a few months, have we? I only just noticed!

[@MDonovan]

I think most FTP tests are around 20 min or less ; I don't know where the one hour comes from. that value would be 10 to 20% lower and often the VO2 is measured as well so the snorkel and lactate lancet distractions might take off 5 to 10 %. In the big picture you would have to measure consistently (sprint first then FTP) over standard intervals to have an idea if the training regimen is effective. hard to do if you are an actual racer on the road. But for everyone else, sure book an FTP and VO2 max test , maybe summer and spring, you'll have a great time.

[@ow916]

@@MDonovan 20 minutes is a common test, because for most (but not all) 95 % of 20 minutes is accurate enough, while also doable in practise. It's a practical solution, not a theoretically optimal one. Lactate measures doesn't impact output at all in my experience. Just a pinprick. The VO2 mask I've used is open, and completely unnoticable when approaching pain zone. Possibly those where you have to bite might impact a little bit, but really, the exertion hurts most regardless. ("Approximately one hour" comes from the definition of FTP, as most athletes can work at threshold for about an hour.)

[@mrfailure93]

Blake was an awesome choice, he's great. Awesome video guys, I feel better now because my ftp isn't very high but my sprint power is decent.

[@gcn]

Thanks Evan!

[@amandanorth6526]

Love Blakey! I'm getting in to GCN from GMBN while training for a couple of long road rides. Both channels are informative and motivating. Nice to see the collaborations.

[@tombukowski3839]

One of the very best GCN videos I have ever seen, informative and fun without being silly.

[@clos2132]

This is one of the best GCN videos I've ever seen! I've not laughed so much at someone's agony as I have today. Sorry guys, but it was great! No pain no (marginal) gains!

[@gcn]

Great stuff Carlos! Thanks for watching!

[@neilgj6305]

This was one of your best videos. Well Done !!

[@gcn]

Thanks Neil 👍

[@lfuscao]

I do agree!

[@jaykan1002]

One of the best video I have watched on GCN. Super informative, very scientific knowledge from an expert, and even better the fact that it strays away from the "typical knowledge" that some of us already knew... aka introduced new ideas/concepts. love it. Keep up the good work

[@geyster97531]

Awesome work to all of you ! And Si, you were absolutely smashing it, as always. Another great piece of journalism from you !

[@jcam4071]

As a hardcore DH mtbker this training stuff seemed pointless...until I did an endurance mtb race and my lungs almost went out through my nose😅I already followed GMBN so I gave this sister channel a try. I don´t regret it at all. You guys give a lot of very interesting nutrition/training tips that can be applied across all cycling disciplines. Just by following these I was able to finish the next endurance mtb race in top shape and even smoked some of the guys that left me behind in the previous one, but, above all, I finished feeling more happier and healthier than ever before. Keep it up guys!!!

[@gcn]

Great to hear! If it's training and nutrition tips you're after, you might enjoy some videos on our dedicated "GCN Training" Channel! kzbin.info

[@velowibble]

Nice to see Blake on GCN for once! More of this please. We need GCN vs. GMBN vs. GTN soon

[@gcn]

Great idea!

[@morosis82]

I can tell you, one thing I find the best channels to watch are where there is a bit of good natured banter between the hosts. Yours is no exception! :)

[@geoffreyanderson4719]

Thank you to Prof Passfield and thank you also to Si and Blake for this most excellent video for sure. It is one of the best I have ever seen because it is fascinating and carefully made and I've never seen such a concise and well done cycling physio video. It's in my short list of favorites ever.

[@kendallseaton2621]

Brilliant! I can't even say how much I enjoyed this video! Suffering-smiles-numbers... all the best parts of cycling.

I never commented before, but Louis should be a regular on your show. Very good answers given in a way that was easy to understand. He really added a nice touch and the chemistry between Simon and Louis as presenters was really good!

[@stuarthenderson7354]

Excellent one of your best to date!! Great chemistry with Blake and Si LOL

[@thesingingcyclist8127]

This is probably my favourite video to date... Keep up the great work!

[@johntrussell7228]

This is the best GCN video you guys have ever done!! Please do more videos like this. Really great stuff and explains a lot, even among guys in my own team!!

[@gcn]

Thanks John, great to hear you enjoyed the video!

[@o0Maximus0o]

Great video! This is basically the tenet behind 4DP used in the Sufferfest app. They do a similar power test the yields 4 results then assign a rider profile based on the results. There’s corresponding training prescribed to develop either your strengths or your weaknesses.

[@chrisbowe8783]

@David McQuillen is that correct ? Didn't realise that

[@fabiodavilacarvalho1338]

What an amazing video! The best I have seen in a while. Congrats!

[@harrie974]

Making great videos day after day is a big challenge. But there’s still so much to talk and discus about, that you can go on for ages. I love the tech stuff and I love it when you bring on the experts. Thanks for the inspiration and keep up the good work👊

[@gcn]

Thanks Har Vélo, glad you find it as interesting as us!

[@LauraChutny]

Great video. Very interesting exercise physiology. I’ve been using the 4DP (4 dimensional) power approach from The Sufferfest since January (measures 5s, 1 min, 5 min and 20 min power). Helps me figure out what kind of workouts will improve my weaknesses *and* strengths. Serious power and endurance improvements since Jan for this 51 year old!!

[@SubMariner_]

Hey GCN, I just met the professor at the MEC store in Calgary, Canada. I stopped by him to say hi and he was a bit surprised to be recognized here. He even said that this was the first time someone identified him because of GCN 😉 Great guy to talk with.

[@samtravis4822]

Completely fascinated by this video and all the expert advice given, this is truly superb stuff from GCN/GMBN!

[@gcn]

Thanks Sam!

[@momentumcycling6262]

Excellent video here GCN. I had the privilege of being a subject in Louis and Juan's training study at the University of Calgary last year. A great experience but man did they make us work hard in those tests!! Louis is a great guy and so intelligent. The cycling world is fortunate to have him studying the exercise physiology of cyclists.

[@leeshirley14]

Excellent video! Just completed the TOC at 80% of FTP for the 3:30 to complete the 80 mile course. Nothing left in the tank at the end! Following the numbers really helped by having a strategy to prevent burning all matches too early!

[@placidfernandes]

Wow!!! One of the best videos iv seen on the channel to date.. thumbs up guys!!

[@Liv3rman]

Fantastic, informative content guys. I have taken a lot from this video for my future training. Thank you!

[@thyneshgunaselan4043]

Always nice to have Prof Louis on, his explanation on scientific stuff is easy to translate and understand.

[@113Tuborg113]

Professor Passfield is a joy to listen to. And thanks to you all at GCN for questioning and explaining accepted wisdom. Brilliant vid.

[@CynthiaS1951]

This is one of the most informative videos I’ve see now anywhere!! Thank you, GCN!

[@gcn]

That's great to hear! Thanks for watching

[@TheTurnerturner]

I'm new to the power meter game and have just started training with FTP, watching this video has helped me understand what I am trying to achieve. Looks like what I am doing is OK which is reassuring as it is bloody confusing otherwise! Keep up the great work Si.

[@gcn]

Thanks Harry for watching!

[@sudduthjonathan]

Great video! Blake and my numbers are VERY similar (fast twitch guy with pecks here), but I only weigh 65 kg and am 40 years old. This exactly explains why training sessions this winter based on FTP on Zwift were so variable. The intervals (the 30 sec bit at the end) were always relatively easy but the longer sustained efforts were harder. I think it’s time next winter to do the 4DP on Sufferfest and other “smarter” training software and leave Zwift for my endurance and fun rides.

[@kdmk94]

You are awesome guys, this is very informational vid. Keep those coming more often!

[@MK-je7kz]

It would have been nice to see Emma's results. Also boys' weight would be nice to know, because that FTP difference is even bigger when considering that Blake weights, what, 20 kg more than Si. That's lots more watts per kilo for Si.

[@jdcampbell23]

Great blend of information and entertainment!!! Thanks for sharing your actual results. All three presenters where amazing.

[@Malandirix]

These videos are so well done

[@JohnBaxendale]

Awesome video, really interesting! Please do more of this kind of video, this is really good information presented in a very digestible and understandable way, great work!

[@walterzabe4825]

I have a powermeter because it helps me to keep tracks of my improvements but I don't use FTP as a training value anymore. I use heart rate as runners do to do tempo, sweetspot or threshold sessions (great video of Jack Daniels about threshold). The only test I do is the MAP test (maximum aerobic power) every 4weeks block. Starts at 100watts and then increase every 2min 30watts until you colapse. For exemple, mine is 410watts and my maxHR is 182. It is more or less the same as the Vo2max test but from my point of view more accurate. I use this value to do 30"/30" or 1'/1'. But for the 2x20min I stay at 90% of my maxHR and I check my power but I don't target a power number. For swetspot max 85% and tempo 80% of maxHR. I use to training with 20min test value * 0.95 and...very fatigue and not great results cause my FTP was overestimated and thus the workouts were to high in intensity. Since I work with HR for long intervals I have better improvements and less fatigue over time. Your heart rate is the reflexion of your fatigue. Your HR is more accurate to reflect your current threshold. In my opinion the FTP value is not useful at all and its calculation 0.95 of max 20min test is not accurate. Just ride at max 88% or 90% of maxHR and you'll feel your threshold. Do what runners do and transpose it to cycling. I do gandfondos and train like a marathonian. If you do crits train like a half marathonian or a 10km runner. Less time and better results. 4X4weeks blocks before your primary event of the year. Mine is the 8 july for "L'étape du tour" I feel great and building my fitness without fatigue. PS : regards from France. My english is terrible Walter,

[@scottishjohn]

Great video once again with Dr Passfield. Very reassuring that not all training for each rider has to be the same and also very reassuring that each riders physiology is different and so what you can do in training and what you may need to work on is also very different. I guess that it means that we don't have to worry about just one number any more as we are all kind of complex and looking at the issue of getting the best out of us as an individual is also a more complex issue and it would appear that the more the reasearch is done on things then the more cloudy the picture is but also how it does give more variety for riders. Which is good, the thing which seems to come across is not so much to worry about numbers and power but more worry about what you would like to be do, such as sprints or climbs or long powerful efforts (such as a TT) and then try and tailor your training to replicate the sort of effort that you would experience in this sort of situation so that you body can adapt and be able to cope with these sorts of situations. Does seems like a case very much of listening to your body when your training and finding what you can cope with and how you improve things. Really love having more of Dr Passfield on the show and its always really interesting to hear what he is up to and the research there doing. Oh boy Si that was one sufferfest that you had going on there with the testing... such an inviting place to suffer... in the basement👻!! Cheers guys and keep the great videos coming!

[@itarry4]

Great video, do more collaborations with GMBN love seeing Blake work. 😎😋

[@comrad707]

awesome video for someone that's just started to get into cycling, great job!

[@mattnugy]

This is great! I am more of a "Mr Fast Twitch" type rider and over the years I sort of accidentally discovered longer easier efforts tend to do more for me than shorter intervals... So neat to hear my "anecdotal" experience corroborated.

[@rafaelmondini]

This video is a real eye-opener and might be the best one you guys ever made! Thanks a lot!

[@gcn]

Thanks Rafael Mondini-Bueno!

[@haroldhdknoxstreet-glide5331]

AWESOME MOTIVATION...😎 I’m 57 now and cranking up training again...in a sprint 17 years ago did 1200watts so I’m a little proud of me...but I’m at maybe 25% of the training capacity that I’ve had at 40... So plans are for 50%... Thanks so much for all the input and motivation.

[@monkobillo5806]

one of the most valuable videos on training. excellent. :-)

[@dogsdangelies1]

Love the info, but also love the competitiveness between the two teams, would love to see more

[@erwineerwine]

thanks for this great video and for all the other great video’s too actually. you guys really brighten my day.Really motivating! keep up the great work and thanks for involving Emma!! cheers fron Sagan-land:)

[@gcn]

Glad you enjoyed it!

[@Liam_ridesbikes]

What a fantastic video, Louis is such a fountain of knowledge!

[@janwillemkuilenburg7561]

This is a fantastic video!

[@gcn]

Glad you enjoyed it Jan!

[@kurtobermeyer3356]

One of the best vids on GCN. Thank you.

[@gcn]

Glad you enjoyed it Kurt!

[@AlanJeffreyMcClainJr]

It's Blake and Si! Two of my favorite presenters!

[@sailinggreenpearl2571]

Great co lab with Blake, so much fun watching this video. Literally, laughed out loud on multiple occasions. Great analysis at the end.

[@gcn]

Thanks Mike

[@Lemond75]

Great video chaps; please do more like this 👏👏👍👍. One question though: where does this leave sweet spot training if the recommendation is to polarise training?

[@LachlanHS]

really well done - you've presented this really effectively

[@bubbaw1234]

I love these more nuanced videos. Top notch content. It's funny that with all the data we can collect, it still comes to a philosophical question: do you work on your strengths or your weaknesses?

[@mayfieldcourt]

This is very inspirational, thank you all and well done!

[@KFN_VII]

Great vid. Sir and Blake are great on screen with each other. Please do more.

[@s0012823]

The evaluation is very insightful! Thanx!

[@fissionchips8840]

More Blake Samson please 😁👍 Great to see!!! For the matter grab Mr Ashton also!! I feel a challenge coming on GCN vs GMBN 🏆

[@phillwhitlam6999]

Excellent video, fun to watch others suffer and gave us some great insights into the science behind training, and FTP's. Well done guys more of the same please.

[@Yosser70]

I'd put money on Blake having a higher FTP. Those tests take some skill to perform well, knowing how hard to go, ramp up, down or steady are all things you can only learn after doing a good few of them. Also, this will throw the numbers off for the tests after. Si was spent after his FTP because he knows how to put that max 20min effort out, whereas Blake looked tired but definitely not as much as Si so had more in the tank. This would mean Si would have his edge knocked off for the following tests but Blake wouldn't so much. Interesting test but not exactly groundbreaking, a sprinter needs to work on endurance and a climber on their sprint, who knew ;) Saying all that, one of the best GCN vids for a while :)

[@MDonovan]

it is an interesting conundrum who can be a better all rounder...like Sagan vs Martin, Cancellara and Wiggins show the disadvantage a strong sprinter has unless he has the best team to take him to the line, I think Sagan and Gilbert are classic all rounders now they really have to work hard (training) to get the win and age is a factor too

[@jeffreycunningham7742]

Great video!! It seems to show how much a derived power curve that most interval workouts based on FTP use, could be significantly off for those more anaerobically inclined. Maybe Sufferfest workouts based on their 4DP are closer to the right answer.

[@chiefrocker12]

Thoroughly awesome and funny Mr No Pecs. Notch this one as another great informational video.

[@gcn]

Thanks Ravin!

[@Mikethemac2015]

Congratulations on 2.01M!! Shocked that you interact with most comments. :)

[@portemat]

Great vid, as always from GCN. Take a look at what The Sufferfest do in their training vids/app. Similar idea in that FTP alone is not always a good base for your training as people are too different. They call it 4DP, where the sprint targets are based on your sprint power & longer efforts based on your FTP. Makes for some very hard sessions, but ones that you can complete.

[@TheAce1727]

Very very fascinating, I loved this video. This is some serious stuff you can't find anywhere else on the internet

[@gcn]

Thanks TheAce1727!

[@zzhughesd]

WOW Ace Vid guys, think best yet. Mr. Professor has great oratory easy on ears skills. Actually took from it rather than over ears out the back

[@bugboy152000]

#GCN what I’m taking away from this video is that I need solid endurance (ftp) but also need to identify my strengths and develop them. I have found a great 3 minute 11% grade climb that I lap over about 4 times. It’s increased my recovery time and all segments are getting faster. Based on this video I feel I’m trading properly. Thank you!

[@Rustoleum5]

Just the motivation i needed for my ftp test today!

[@running4fun863]

Love watching this Channel. You guys are great

[@donaldryder5534]

Great video, lots of insight from the Prof!

[@gcn]

Prof. Louis really knows his stuff!

[@danielmontgomery7948]

very informative video! Also, quite entertaining to watch.

[@TheWaxChainFanClub]

Outstanding, Si. Outstanding. Very interesting indeed, nice one, lads. Excellent.

[@gcn]

Cheers Michael! Glad you enjoyed the video!

[@EvidenceofaFabulousLife]

Great stuff, thank you to Si, Louis, Blake and production team. Looks like it was filmed in some kind of Russian Gulag 😂. Thanks Blake for coming over to the dark side and participating. What I found most interesting is that Blake could be in such fine form for sprinting and very acceptable FTP and yet he had never tested before. Therefore he just arrived at this point from riding his bike and doing what he loves to do, cycling. I'm a great one for numbers and love the scientific approach, but I think this demonstrates that you should just get on your bike and ride it, regardless. Enjoy cycling! I raced an 80km mountain bike race yesterday with 1900m of vertical ascent and decided to switch power off, simply concentrating on cadence between 70-80rpm climbing and as close to 90rpm everywhere else. I just drove the biggest gear I could whilst maintaining that cadence. I don't think I could have done any better riding to power, I just went as hard as I could, all the time (heavily supplemented by SIS 😂). 37C at one point, I can confirm that their isotonic drink works! Ride on, Tim

[@gcn]

Cheers Tim for watching! Sounds like an awesome race!

[@EvidenceofaFabulousLife]

They are not happy here unless you need an oxygen tent by half way 'round. I think they feel they are letting you down if you're not close to death: www.strava.com/activities/1614718906 If it ain't on Strava, it never happened. My legs know it happened today. Ride on! Tim

[@drewjanzen2739]

Can't tell you how happy I was to see Blake here on GCN, more Blake the better!

[@haydenjefferson5225]

Awesome topic to cover, great to see an experts point of view too. 👍

[@harrymcgarvie666]

I really think Blake could have smashed that sprint test if he'd been on the drops. He did really well but could have boosted GMBN's image more!

[@fernandoroman6494]

"Why are ur bars not 700mm wide?? and what in the world are those curvy thingies at the ends?"

[@404nobrakes]

Fernando Roman the Enduro market these days would make you think 700mm is basically a flat bar road bike.

[@zereshgeresh257]

Great vid , more of Professor Louis Passfield please .

[@allo2u85]

Laughed out loud at the motivational speeches you gave each other. Great vid guys!

[@jeffkerr6527]

This information fits neatly into the 4DP test the Sufferfest training app uses. I'd love to see GCN visit the SUF crew at SUFCamp in Switzerland this summer. It's right in your backyard!

[@lisapet160]

Like Professor's presentations and find them very practical. Including this one, where practicality means that I don't need a powermeter (except for some cases of turbo-trainer driven curiosity). HR and speed readings suffice for most of us, and riding with the same speed at lower HR than previous season is enjoyable, i.e. how cycling hobby shall be.

[@garybc]

Really love the crossovers between GCN/GMBN/GTN/EMBN!

[@gcn]

Glad you enjoyed the video Gary!

[@ChasingChinster]

I do a little heart rate based training, but mostly perceived exertion (RPE) and this seemed fairly obvious to me. FTP is a great data point to know what power you can sustain for an hour, but so many rides fall into times and efforts that aren't "sustain for one hour" like gran fondos and sprints/shorter time trials. Blake and Dr. Louis Passfield were FANTASTIC guests to have on this episode and this is was a high quality video. Thanks, GCN!

[@gcn]

Thanks Chasing Chinster, glad you enjoyed the video.

[@helendale7668]

Loved Simon's smile when Blake said he was going to make a cup of tea !

[@paulc8985]

Really enjoyed this. Can you and the GMBN team take this further? maybe a proper competitive lab session? I am definitely more Blake than Si and older than both... so its all just inspiration from where i am sat... Loved watching Si struggle to put out a meagre 1k peak power... thanks all

[@jamesainsworth5711]

Great video! My thoughts are that in order to win a race, you have to be able to finish a race. The ability to sprint isn't going to help me much if I can't stay with the pack or if I'm just too tired at the end of the race to put in that effort needed for a sprint. Targeted FTP training has really helped me and I find it to be a great tool. My week is a combination of HIIT (usually by chasing some local segments), SST (most often done on my trainer using erg mode), an easy endurance ride (the long Sunday ride where I can relax and enjoy the scenery and reap the benefits gained from the harder mid-week sessions), and rest. Then sticking in that tough FTP test about every 6 weeks just to make sure I'm on the right track.

[@gcn]

Hey James, sounds like you have your training pretty sorted!

[@cottaging_womble905]

Great video. Really interesting discussion, combined with some good old fashioned schadenfreude from the suffer-fests. Thanks guys!

[@davidgeorge9233]

Really interesting video GCN, I don’t have a power meter so have no idea of my FTP, however I recently undertook a physiology test to determine my max and sub maximal power and blood lactate levels and it’s been interesting changing my training with these in mind. If I had a power meter I imagine my FTP give me another piece of data to work with also, I think it helps having some figures to train to!

[@johnjohannawilson6834]

Probably the most helpful training video by GCN to date.

[@gcn]

Thanks JohnJohanna Wilson, glad you found it useful!

[@drabir]

At the beginning of 2018, i switched from TrainerRoad to Sufferfest and immediately had to take one of their 4DP tests. I trained for six months using these 4 new numbers for my targets and noticed a massive increase. I went to a race in May and knocked hours of my previous times. The benefit of having a 4DP profile is that workout targets then become much more precise and useful. How about doing a review on Sufferfest and the people behind it?

[@tristramwilson2661]

Excellent vid guys! Thanks

[@adambeevers3679]

Great video. Thanks Louis for giving your time. I would be very interested at a similar video, focussing on MTB xco racing. #gmbn

[@roadiedvm]

These analyses closely resemble The Sufferfest 4DP power profile with five second neuromuscular power, one minute anaerobic capacity, five minute maximal aerobic power and 20 minute FTP. Sufferfest stopped using a standard 20 minute FTP test last year for the same reasons that Si illustrated, that it doesn't adequately reflect a rider's strengths and weaknesses.

[@Quepedal]

What an enlightment! Complete mind blowing

[@gcn]

Cheers Miguelangel Da Vila

[@paulhilliar]

The Sufferfest do a really great job of this sort of testing. The 'Full Frontal' test (5s, 5m, 20m, 1m) will identify your rider type and then match you to a training plan that addresses the cycling weaknesses that the test exposed. It would be a great GCN video to do the testing and then follow a few workouts - we love the suffering :)