Arvind Ashok: Fitness & Nutrition Simplified

Bounce, Stride Angle, Toe Lift, and more. Oh my, what happened to plain old heel striking?

I will be hon­est. I am not a fan of long dis­tance run­ning. The most I could tol­er­ate was run­ning a half-marathon (back in 2008), and even that made me wanna go to sleep. The train­ing was so monot­o­nous and bor­ing, with most of the focus on log­ging enough miles. Since then, my knowl­edge of fit­ness, includ­ing endurance train­ing, has grown leaps and bounds. If I were to train for a marathon today, my train­ing hours would be halved and I would see a sig­nif­i­cant improve­ment in per­for­mance as well. But more on that later. This post is about being a more effi­cient runner.

Bare­foot Craziness

When I run, I run bare­foot. This makes me more effi­cient than a ver­sion of me that wears shoes. I attribute my lack of injuries, bet­ter recov­ery, less tired­ness to run­ning bare­foot. If you are a seri­ous run­ner, look into it. It was one of the smartest things I did. Run­ning shoes have a lot of spiel about “cor­rect­ing prona­tion” and stuff like that. But that’s how you run nat­u­rally and shoes by cor­rect­ing your stride often end up caus­ing a lot of injuries. Shin splints, for exam­ple, are one of the most com­mon ones. But a more generic issue that shoes cause is not giv­ing you feed­back when you are run­ning poorly. All the padding, espe­cially in the heels (why do you need so much heel padding if heel strik­ing is taboo?), doesn’t tell you “Hey idiot! You keep land­ing on your heels”. Instead, this pain man­i­fests in knee pain, shin splints etc. If you run bare­foot and land on your heels, you know imme­di­ately. And you have no option but to run in a more effi­cient man­ner. But as I keep repeat­ing, what worked for me need not work for you. Enough about me and enough about bare­foot running.

Improv­ing efficiency

I came across this video which packed a whole lot of infor­ma­tion in 15 min­utes. If you are a seri­ous run­ner, take a look. Or if you are like me and zone out while watch­ing videos, read the rest of this entry.

  • Con­ven­tional wis­dom says that East African run­ners are bet­ter because they are genet­i­cally pre­dis­posed to run bet­ter, run to school while they are kids, train at high alti­tudes. This video sug­gests that the truth is a lot sim­pler — they just run more effi­ciently.
  • A marathoner takes 1000 strides per mile, or 26200 strides total. So, cor­rect­ing an issue is going to go a long way. Or on the con­trary, one small inef­fi­ciency is going to be mul­ti­plied with a huge fac­tor — 26,200 to be exact.
  • Bounce, Stride angle, Over-stride angle, Toe lift angle, Upper body torque, and Crossover angle — these are the 6 aspects that they get into.
  • Bounce: The ver­ti­cal dis­tance you move, as your head bobs up and down while run­ning. The run­ner shown in the image below is Ryan Hall, who was the first Amer­i­can to run a half-marathon under the 60 minute mark. So, this guy is not a ran­dom noob. He has a bounce of 4″, which mul­ti­plied by 26,200 strides is a whop­ping 2.6 kilo­me­tres! And when you bounce up, you have to bounce back down = 5+ ver­ti­cal kms! So, not only are you doing a lot of extra work because of the bounce but the pres­sure you are putting on your body is a lot — as you are land­ing heavy all the time. This up and down motion is one of the pri­mary causes of fatigue. So, reduc­ing bounce will go a long way in improv­ing your run­ning and stride efficiency!
  • Stride Angle: The max­i­mum open­ing between the front and trail­ing leg. Every degree increase here leads to a 2% increase in stride length. Stride angle is a func­tion of your hip flex­i­bil­ity.  A poor stride angle leads to over-extension.

    Note the figure-4 that both of them make!

  • Over­stride: This is basi­cally reach­ing out far in front. This is prob­a­bly the biggest cause for knee pain and shin splints. You are reach­ing out, and land­ing ahead of your­self. Thus, your body puts pres­sure at an awk­ward angle on the knee and shins. Over­stride also inevitably will lead to a heel-strike. It is imper­a­tive that you land under your body, and not in front. This is a com­mon prin­ci­ple when you work with weights as well — when squatting/lifting, you always want the bar to in the same plane as your mid­line, or at least as much as pos­si­ble. The goal in an over­stride angle is to keep it as neg­a­tive as pos­si­ble. And the way to fix this is to increase stride angle.

    over­stride = heel strike

  • Toe lift: This is the biggest cause of shin splints. You can see the toe-lift in the pre­vi­ous image as well, that’s an angle of 23 degrees. In com­par­i­son, how does a 0 degree look?
  • Upper body torque & Crossover angle: My knowl­edge of upper body focus in run­ning was not to swing your arms across. This expands on that a bit. Twist­ing and torquing the upper body causes over-pronation in your legs and kees, as it is a com­pen­satory action. Get­ting the crossover angle as close to 0 degrees is important.
  • The video fin­ishes off with some magic, where by improv­ing flex­i­bil­ity, the stride angle etc is vastly improved within an hour or so. But hey, these guys made a really great video and they are obvi­ously wel­come to sell­ing what they do.

An ultra-marathoner I used to run with once remarked that I had really good run­ning mechan­ics for a recre­ational run­ner. And we got talk­ing and in my case, it is a direct con­se­quence of bare­foot run­ning. I have a poor thresh­old for pain, espe­cially when it involves run­ning, and once I min­i­mized it — I auto­mat­i­cally became a bet­ter run­ner. And now, I can see how I can take it fur­ther — coz I do a lot of run­ning while play­ing Ulti­mate Fris­bee. Quite hon­estly, I’ve been lax about work­ing on my run­ning but that’s been part-laziness and part-necessity, as I am try­ing to put on some mass. Once that’s done, I am going to start by get­ting back to prac­tic­ing pose run­ning — to bet­ter my run­ning style and mus­cle use/distribution while run­ning.  Hill sprints, to work on speed. And flex­i­bil­ity, to work on the issues high­lighted in this post. This post shows that a lot of these issues are inter­con­nected, and if you get to the under­ly­ing issue and fix it, the improve­ment in results will be mag­ni­fied sev­eral times.

And if you are seri­ous about run­ning — take some time off. Work on these issues. One big prob­lem I have with run­ning is the train­ing involved — it is just too much time, and stress — miles upon miles upon miles of it. I think there are more effi­cient ways for that as well. But by work­ing on being more effi­cient, you will become a bet­ter run­ner, and add a few more years to your legs. I hope this post has given you guys some food for thought.

Next Up

This post got way longer than I intended. I wanted to get into pose run­ning, and some drills but will save that for another post. Endurance train­ing is another post I have in mind. Run­ners — video tap­ing your­self along with your run­ning bud­dies and ana­lyz­ing the video might lead you to some awe­some insights. And work on your flex­i­bil­ity and mobil­ity. Have fun running!

  • Mama

    Totally agree with the part about feel­ing weird to keep run­ning and run­ning. Seems like no end to it. Its so bor­ing!! Fris­bee is much bet­ter and I have had expe­ri­ence with the shin splits and upper body twists. I guess i need to fix that even for short dis­tance running

  • Manu

    Yep.. need to fix the run­ning mech­a­nism. I am work­ing on my hip flex­i­bil­ity and core strength. Need to increase stride angle to optimum!

  • http://twitter.com/arv43 arv43

    Yeah, I’ve real­ized the same thing. Inef­fi­ciency is an inef­fi­ciency, and it shows up all the time. In fact, in my case, in long dis­tance run­ning, I am not doing any­thing else but monot­o­nously run­ning. So, I can slowly work through a check­list in my head of do’s and dont’s, and fix things. While play­ing Ulti­mate, my brain is else­where. And I do think my form goes to shit many times — cross-swinging, shuf­fling feet etc. A large-scale fix is nec­es­sary, to make it sec­ond nature.

  • http://twitter.com/arv43 arv43

    Keep track of your progress. Start with mea­sur­ing ham­string flex­i­bil­ity, hip flex­ion and flex­i­bil­ity. As you work on flex­i­bil­ity and core strength, you should see progress in these ranges of motion. And that should auto­mat­i­cally trans­late. It is hard to know where you stand if you are not chart­ing progress — see­ing what is work­ing, what is not etc.

  • http://hbfser.wordpress.com Raj Gan­path

    Awe­some post! I, for one, need to work on my run­ning and this is def­i­nitely push­ing me in the right direction!

    May be I’ll join a group of run­ners once I move to chen­nai. Now if only there is one such group that doesnt hate me… ummmm!

  • Lavanya

    Extremely well writ­ten post, A!

  • http://twitter.com/arv43 arv43

    Thanks!

  • Mahesh

    Awe­some post Arvind. One of the best posts on run­ning mechan­ics I have come across. Pretty good job. Im totally with you on all the points you have high­lighted — toe strike, stride length, bounce, UBT. Learnt through my mis­takes., par­tic­u­larly because of upper­body torque which caused a lot of Ili­otib­ial band pain. When i mod­i­fied my stride, heel strike, over­all run­ning form, it had resulted in almost close to 1 hr of improve­ment in my marathon time and painfree run­ning few years ago when I used to train. Then, like you I went bare­foot, sprinted bare­foot or pseudo­bare­foot, hiked bare­foot and i loved it. Hop­ing to get back to run­ning soon after a long break due to gain­ing some mass. Keep it com­ing. Always enjoy your post.
    Whats your take on V02 max in addi­tion, rela­tion to the biomechanics?

  • Pasokan

    Wow! So much of nice sci­ence. I like this a lot

  • http://twitter.com/arv43 arv43

    Thanks Mahesh! Shav­ing 1 hour of your time is amaz­ing!! And yeah, I think both of us are in a mass gain­ing phase right now. I am look­ing for­ward to work­ing on my run­ning too, once am done with it.
    About VO2 max. As it per­tains to endurance train­ing, it is cer­tainly one of the core vari­ables that deter­mines per­for­mance. I think if the mechan­ics are improved, your mus­cle fatigue is auto­mat­i­cally reduced. But it ulti­mately comes down to what Verk­hoshanky (this genius Russ­ian coach) refers to as antigly­col­itic final­ity — how effi­ciently can our mus­cles extract oxy­gen from the blood and put it to use. So, reduc­ing mus­cle fatigue while increas­ing avail­able oxy­gen does seem like a one-two punch.

  • Ramani

    Shall cer­tainly pay atten­tion to some of the sug­ges­tions here towards improv­ing my long dis­tance run­ning.
    If fol­lowed or adopted, looks like some mir­a­cle may hap­pen. I indeed need one to make my self enter Com­rades 2012.
    Shall await the “pose run­ning as well as the drills ” post.
    Shall read this, re read it and try drum­ming in to my head in to fol­low­ing at least some of these
    Ramani
    Chen­nai Run­ner
    india

  • Ramani

    Hi Raj Gan­path,
    Try Chen­nai Run­ners, when you are in here.
    Great group, many marathon­ers and many more bud­ding marathon­ers are there
    ramani

  • http://twitter.com/arv43 arv43

    Hi Ramani,
    That’s good to hear. Keep me posted on what improve­ments you see etc. I am work­ing on the pose run­ning videos, will update this com­ment once am done with it.

  • Murali

    very infor­ma­tive post!
    do the mechan­ics change a great deal while sprint­ing?
    about bare­foot run­ning, is it ok to run bare­foot on con­crete or on the street?

  • http://twitter.com/arv43 arv43

    Thanks Murali. Mechan­ics — not nec­es­sar­ily. It is just pump­ing faster (I visu­al­ize a pis­ton). But sprint­ing is even harder on the legs, so what I try to do con­sciously is keep my stride length in check.
    Bare­foot run­ning — it is a very per­sonal choice. While it is far supe­rior to run­ning with shoes, it requires a lot more care than run­ning with shoes. Some­times, it might be use­ful to tran­si­tion to bare­foot run­ning, using a shoe (like Nike Free or Vibrams). I didn’t — I just took off my shoes and ran, but just sug­gest­ing less dra­matic ways. Con­crete — not good. Street — yeah, a lot bet­ter. I’ve ran on streets here, and in Madras and both felt the same. The newer the street, the bet­ter (coz there are less gaps in the tar).

  • http://twitter.com/arv43 arv43

    Thanks Murali. Mechan­ics — not nec­es­sar­ily. It is just pump­ing faster (I visu­al­ize a pis­ton). But sprint­ing is even harder on the legs, so what I try to do con­sciously is keep my stride length in check.
    Bare­foot run­ning — it is a very per­sonal choice. While it is far supe­rior to run­ning with shoes, it requires a lot more care than run­ning with shoes. Some­times, it might be use­ful to tran­si­tion to bare­foot run­ning, using a shoe (like Nike Free or Vibrams). I didn’t — I just took off my shoes and ran, but just sug­gest­ing less dra­matic ways. Con­crete — not good. Street — yeah, a lot bet­ter. I’ve ran on streets here, and in Madras and both felt the same. The newer the street, the bet­ter (coz there are less gaps in the tar).

  • http://themadmomma.wordpress.com The Mad Momma

    well this explains why i lost my knees instead of weight :-/

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  • Aso­brils

    Is there any nor­ma­tive data that says what the appro­pri­ate con­straints for these vari­ables are? 

  • http://twitter.com/arv43 arv43

    Nope. If you are able to find any, do send it across.

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  • http://www.wheelchairindia.com Wheel­chairs

    I really appre­ci­ated your post, this would really pro­vide the great infor­ma­tion .Thanks for shar­ing.
    wheel­chairs

  • http://twitter.com/arv43 arv43

    Def­i­nitely! Thanks for reading.

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  • Karthik Pad­man­ab­han

    I had read this awe­some post before, book­marked it and read this post again just now. Noticed these com­ments only now though :-). There is one such group I know…

  • Srid­ha­ran Krishna

    Thanks for sharing…Very use­ful info. FYI…Link to the youtube video is not working…

  • http://twitter.com/arv43 arv43

    Thanks! And yeah, looks like the video has been removed due to some copy­right claim issue. ‘thanks for the heads up

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