That means he's slightly older than he should be.
Rules of the Internet 45. Rule 45 is a lie. Check out my art if you notice.Yeah. Goku trained his ass off all his life.
Hell, he trained his ass off to beat Vegeta and failed.
Yes, he ended up surpassing him due to a stroke of luck he couldn't have known about, but he still trained just as hard.
One Strip! One Strip!As Sasuke demonstrates, the fact that Vegeta Can't Catch Up is the reason he's sympathetic in the first place.
He never mentioned King Kai but he did mention training at 100x Earth's gravity.
Let the joy of love give you an answer! Check out my book!Yeah, but the thing I meant to get across is that Goku doesn't need to try hard to beat Vegeta.
Like, Goku does try hard, but Vegeta tries just as hard, if not harder, and yet he still Can't Catch Up.
what do you mean I didn't win, I ate more wet t-shirts than anyone elseGoku tries hard to improve himself. Vegeta tries hard, but not *as* hard, because he assumes that by the simple truth that he is Vegeta the universe will one day right itself and he will be invincible again.
My various fanfics.Plus Goku's smarter in his training.
Vegeta trains on his own, doesn't rest, and pushes himself until he's near dead.
Goku trains with others, learns from masters, and knows when to stop.
Hell, the fact that Vegeta is wound too tight is the only right half of Whis' analysis of their abilities in Ressurection of F. We've discussed how the Goku part is bullshit.
One Strip! One Strip!Vegeta trains like a weight lifter. The highest level gravity his body can withstand without exploding. Then tomorrow, a bigger number. And his attacks are just the most lasers or the biggest lasers he can imagine.
Goku is a martial artist. He learns from masters, he learns techniques, he perfects techniques of his own.
My various fanfics.

Toriyama implied in an interview that the reason Goku didn't grow until training with Kami involved the Hyperbolic Time Chmber somehow, which is how he knew about it later.