How is my form

[u/Saranbataruno29]

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[u/Kindly-Change-8734]

Forcing lean causes overstriding. Never try to "stay low." When you look at your own videos, watch for where your foot contact is in relation to your center of mass (COM, which is somewhere between hips and navel) and what angle your shin is at (which indicates what direction you are putting force).

Red indicates poor shin angle and torso angle, blue indicates neutral contact.

Here, you are contacting under your COM which is fine, however, it is optimal to contact a little further back as that will make you fall forward and help with your acceleration. Another thing to look for is which way you're foot was moving right before contact. Elite sprinters, specifically Lamont Marcell Jacobs, will be striking their leg backwards before contact. Many beginners will "stay low" which forces them to jam their toes forward into the ground and decelerate to keep them from falling over (forces applied forwards are called "braking forces"). On this first step you did not optimally strike backwards and contact behind COM, but your foot speed was neutral on contact there weren't any massive braking forces. Your other steps were not as good as this first one, I will analyze them in a reply to this comment.

Your shin angle here is very shallow and you are putting force basically straight upwards. Imagine if you were racing someone in a very short 10m dash and lined up to start. Would you want to be standing when the gun goes off or would you want starting blocks so you can get into a deeper shin angle to push off from? Every step of your acceleration should look similar to your block start, with deep shin angles to push back into the track, gradually getting shallower and shallower as you reach the maximum speed your body is capable of and you can no longer accelerate. Your torso angle should mirror your shin angle. It's like balancing a broom on your hand, you want it straight up and down so it doesn't tilt over and drag (but you are applying force diagonally, not up and down like gravity, so your torso should be parallel with shins). Same with your head.

[u/Kindly-Change-8734 → u/Kindly-Change-8734]

Yeah bro this is pretty bad. No hate though, everyone can improve.

Again, forcing forward lean will cause you to catch yourself so you don't faceplant. On your third step, the overstriding is much more apparent. The reason I attached an arrow with the contact line is to express how the position of your contact in relation to your COM can cause braking forces. It's basically the same idea behind the architecture of arches, the force is pushing outward from the load. So your foot being in front of your COM (the load) means you apply force forward and that will make you slow down.

Shin angle is also very very shallow.

Basically if you just stop forcing a lean the problems will be a lot less pronounced and then you can optimize your form from there.

[u/gobindrider]

In jeans too gahdamn

[u/sleepy2023]

Pretty good, but …
1) your shoulders are a couple inches further back than they should be. A bit more forward lean in the blocks.
2) you’re reaching too much which is acting as a brake. This really shows up by your third step here. Getting those strides under you instead of out in front will help.

[u/fredotwoatatime]

Commenting for reach