Speed and block over arm
The javelin rewards the speed carried into the throw and a hard block leg, so average distances climb as athletes get faster and learn to transfer that speed. A strong arm without a block leaves distance on the runway.
Average javelin distances climb through the teens with run-up speed, a firmer block, and cleaner technique. As with the other throws, the numbers only make sense alongside the implement weight. Here is how the average moves with age and what separates average from good.
The javelin rewards the speed carried into the throw and a hard block leg, so average distances climb as athletes get faster and learn to transfer that speed. A strong arm without a block leaves distance on the runway.
These are typical marks, not competitive ones. A good varsity throw is well above the age-18 average here, around 170 feet for boys and 120 for girls. The gap is the run-up and block, plus throwing over the top.
A faster, controlled run-up and a firm block, then an over-the-top pull. Throwers stuck at average are usually slinging the javelin around the arm.
Average shows the ballpark. Film from the side, the AI tracks your approach speed, block, and elbow position, so you climb past the age average by fixing the link that is leaking distance.
Follow up in chat and ask questions. The AI remembers your analysis and speaks the language of javelin coaching.
Typical boys' marks by age, girls' marks in the table below. Compare throws only on the same implement.
Typical developing-thrower marks on standard implements.
| Age | Boys | Girls |
|---|---|---|
| 12 | 70 ft | 55 ft |
| 14 | 90 ft | 80 ft |
| 16 | 120 ft (800 g) | 100 ft (600 g) |
| 18 | 140 ft (800 g) | 115 ft (600 g) |
Common questions athletes and coaches ask about this topic.
A directory of every javelin 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.