Can you get physically stronger by improving ki power? Being able to move faster without flight looks like physical strength. They're unable to fly, so they're using a stronger physical push off the ground. Being able to dodge twice as fast means they're physically moving faster. Or are they...
There's also initial Krillin, who is below 10.
Is 10 twice as strong as 5?
That means a quite typical adult human should be able to do half of at least some of these (whichever you think link to power level):
-sprint 100 yards/metres in 5 seconds
-swim across an ocean or sea like Krillin did...
"Hello!!!"
Is this "heeeeeeeeeello" or "hellooooooooooooooooooooooooooooooooooooooooooooooooooooo" or "hellooooooooooooo" or "hellllllllllllllllllllllllllllllllo" or "heeeeeeellllllllllooooooooo" etc