Hey guys it’s Dr. JP and today we are
going to analyze Abraham Kiptun as he broke the world record during the half
marathon in Valencia! The first thing we will look at is his pacing throughout the
race. Kiptum ran the first 5 kilometers in 13 minutes and 56 seconds.
Then, the second 5k split at 14 minutes and six seconds. Now, this was obviously
very fast; however not enough to where anyone would expect the world record to
be broken. What was truly amazing is what happened
during the second half of the race. Kiptum picked up speed and ran the third
5k split in 13 minutes and 35 seconds… and he barely let up this pace as during the fourth and final split he ran it in 13 minutes and 41 seconds.
Similar to when Kipchoge broke the marathon record, Kiptum ran the
second half of the race at a faster pace. Doing this really showcases Abraham Kiptum’s mental discipline and drive. Now the footage we will be looking at is Kiptum during the final 5k split. As I mentioned earlier, he still ran this
part of the race faster compared to the first and second 5k split; however, there
may be some breakdown of form ..as he ran this slower than the third 5k split. I
would have loved to use footage from the third 5k split; however, this was the only
decent footage I can find throughout the entire half marathon. Looking at this
footage, let’s look at general parts of his running, such as stride frequency
which is the rate of steps he takes and stride length. He presents with a solid
cadence of 180 steps per minute. This is a pretty quick rate of steps and is a
common stride frequency for many elite long-distance runners. What actually sets
Kiptum apart from other elite long-distance runners is his stride length.
He presents with a long step length as based off a few calculations, it
seems to be around 2.03 meters. This is comparable to Mo Farah, who is
considered to have one of the longest strides as well. This is obviously
impacted by leg length, but this is also attributed to leg mobility and power
produced through those legs. Now, taking a closer look at the legs when the foot
hits the ground, he seems to be striking around the mid-foot area. Landing around
this area is pretty common in long distance runners. Now let’s take a look
at the landing relative to the body. Initially, it may seem like he is over
striding because of the long stride he has. Just a quick tip for anyone
relatively new to my videos. Overstriding is when someone takes too big
of a step. This causes a bit of a braking mechanism to occur during
landing. Leading to wasted energy as well as adding increased stress to the knee
and ankle joints. Anyway, taking a closer look at the landing, his foot still lands
relatively close to the body center of mass, which would be almost right under
the hips. The landing is still slightly farther from the body compared to the
other long-distance runners we have looked at before, but at the same time
remember… he has long legs. Another way to see whether he’s over striding is
looking at the shin angle. Typically, during foot landing, the shin angle is
perpendicular or slightly less in elite long-distance runners. As you can see,
this is the case for Kiptum as well. Moving up to the hips, we will take a
look at how much vertical movement is going on as he runs. Compared to most
long-distance runners, there is not much vertical movement going on. This is
showing efficiency as he’s making sure to have adequate amount of vertical
force and is really maximizing force directed forward. However, if we do
compare this to my most recent breakdown, which was Eliud Kipchoge breaking the
marathon world record, you’ll see that Kiptum does have a bit more bounce. This
is more possibly due to likelihood of increased power generation through those
legs as he’s running at a faster pace. This may also be due to running at a
slightly slower cadence compared to Kipchoge. A slower cadence typically causes
increased vertical movement. Looking at the trunk, you can see he has good
postural alignment. He keeps it in basically a straight line;
however, he does present with a pretty decent forward tilt especially for a long
distance race. This tilt helps with forward momentum as well as a improved
force generation from the hips during push off. Now looking at the body from
the front, we will compare movement from the right and left side of the body.
Symmetry is very important for efficient running. As you can see, even when going
at a record-breaking pace, he is maintaining symmetrical movement from
the arms and legs as he runs. Now looking at arm movement, he presents with a
similar style like Eliud Kipchoge. He keeps his arms high and close. He
presents with mostly rotation in his arm swing, but still not letting those arms
cross mid line. This helps on counteracting rotational
forces from the legs, so we can maintain a straight path toward the desired
direction. Looking at the head movement, he does look around throughout the race
for situational awareness, but overall, he presents with a neutral position of the head…
basically looking straight forward. Doing this helps maintain core stability which
allows for maximized force generation from the legs. And… that’s it for the
quick analysis on Abraham Kiptum! I hope you guys enjoyed the video! If you
enjoyed it, please subscribe to my channel for future videos if you haven’t
done that already. Also, feel free to follow my Instagram for even more
content! I really appreciate you guys for taking the time to watch this. Please
comment below what you think!… And as always… THANK YOU FOR WATCHING!!!!

Author Since: Mar 11, 2019

  1. You are publishing pure gold JP. Love your voiceover + analysis – the insight, edits and overlays are spot-on + right to the point. Exciting times we live in, to witness records like this being broken but have to add that the VAPORFLY 04% must play a small role in these recent benchmarks. My PR half marathon time has gone from 01:23 to 01:17 by using the Vaporfly 04% Flyknit..the shoes are magic

  2. Another good video.
    About the vertical oscillation. I think you should draw lines on top of the athletes' heads to see exactly how much they're bouncing up and down. It's hard to see their hip movement with their cloths on.

  3. Great analysis. Very instructive as always. He compensates a very high cadence with stride length. Do you think that is good for running economy, JP?

  4. I think forward tilt has no significance. The falling angle is a myth mostly referred to by pose running people. However the mechanics of running at constant speed whether sprinting or jogging is based on producing force directly downwards into the ground so our body can keep on moving above the ground instead of collapsing into the ground. It’s like a ball that is thrown forward, the moment it leaves your hand it has no horizontal force anymore, only momentum. What keeps it moving is the force it applies straight downwards at each bounce and the momentum. So as in running, yet we still have to produce a tiny bit of horizontal force backwards in order to overcome the friction of the ground and the air resistance, yet in no way it is even close to 20 deg or related to that tilt. It is tiny. After the foot passes the center of mass backwards there is almost no force anymore to the ground, so that line of the tilt represents nothing. The only time the degree of the tilt implies of force is when you accelerate or decelerate. You can see that when sprinters get out of the blocks. Then they really push backwards in an angle to the ground, but when they hit top speed they are running tall producing force directly downwards. Actually 100m sprinters in most cases have less of that tilt degree due to more forward mechanics and fast pulling of the thigh forward. That’s why most of them at toe off have a bent knee, because they are already pulling the thigh forward before their foot has even left the ground. They produce the force to the ground very early right at the impact and then already start to pull

  5. You rule bro, but I don't understand why don't you have more subscribers there so many shity useless youtubers and they've got so many subscribers!!! I find your videos very helpful, keep up the good work 👍

  6. Excellent running analysis from you JP. Your voice makes this subject interesting .

    Btw, something you forgot to mention in this vid was the height of the knee drive ,, , i assume that factor determines much of the stride length.?

  7. Sorry, but… I really like your videos, but sometimes you force your considerations although the frame exposes somethings different. The head is not neutral… It lean forward. Landing is in front, full stop, not slightly. Forefoot, midfoot, heel strike are three indicators… In reality there is an infinite number of points. In this case he lands on the rear foot, not heel non medium foot.
    Sometimes seems you want to show that all the elite runners have a single way to run. It is not true. Also by video you try to impose whst you think it is running correctly. Check your videos, are super usefull for us, but your analysis sometimes lacks of precision and quality.

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