What they are
Blocks are a rail anchored to the track with two angled pedals your feet press into. They let you apply force backward and down at the gun instead of slipping, so you accelerate harder out of the start.
Starting blocks are the adjustable frame with two angled foot pedals that sprinters push off to launch out of the start. They give you something solid to drive against, which is why every sprint up to and including the 400 uses them. Here is what they are and how they work.
Blocks are a rail anchored to the track with two angled pedals your feet press into. They let you apply force backward and down at the gun instead of slipping, so you accelerate harder out of the start.
Pedal spacing and angle are set to your build and preference, usually with the front pedal about two foot-lengths from the line and the back about three. Dialing this in is part of building a repeatable start.
Blocks are used in the sprints, the 100, 200, and 400, and the sprint relays and hurdles. Distance races start from a standing position with no blocks.
The blocks only help if you drive off them well. Film your start, the AI grades your block setup and drive angle so the launch turns into real acceleration.
Follow up in chat and ask questions. The AI remembers your analysis and speaks the language of sprints coaching.
Blocks give you something solid to drive against at the gun, with the pedal spacing set to your build.
Common questions athletes and coaches ask about this topic.
A directory of every sprints page on the site, from broad analysis tools to specific phase deep-dives. Each entry points to a focused write-up.
Download the app. Film a rep. See what the AI sees. Free first analysis, no card, no account required.