Plot hole

Mr. Miyagi believed in the power of the mind and getting an understanding of the basic techniques of karate over strength, power, endurance, etc. Plus I dont think they had time. It had to be already November by the time Daniel decided to enter the tournament which was in December.

There were deleted scenes of Daniel pulling Boeing 747's at LAX and doing pull ups on the Hollywood sign before the All Valley tournament.

LOL @ "unmeated bones."

His workout regimen consisted of being used as a slave by Miyagi, sand the floor, paint the fence, wax on, wax off. In Cobra Kai Daniel-san tries to impose the same training on new recruits and they tell him to piss off.

People take this movie too literally without realizing that it's mostly symbolic.

Read some Zen koans to realize that this movie is also trying to display some Zen koans in an American setting. Miyagi's training techniques are not meant to be realistic, they're not meant to be authentic training techniques.

This movie is also not about training realistically for a tournament, any old movie can do that. This movie has a deeper message about the spirit, something you can't train by just lifting some weights or running around.

This movie is also not about fights or bullying.

It's about the kind of inner insights you get from seemingly ridiculous Zen training, and about the spirit, mind, strength of both, and so on. It's basically the 'subtle force' vs. 'pure muscle'. Having daniel lift weights and run around would just destroy the message.

You can read Bruce Lee's writings, you can read Zen koans, or you can watch this video:

(The Truth Behind Traditional Chinese KungFu)
https://www.youtube.com/watch?v=2gvGebn11sk

The point here is that pure muscle may win a lot, but when opposing a 'subtle force master', all it can do is tire itself and possibly injure itself, it can't even land a hit.

The training montages are basically 'westernized, modern Zen koan' moment, with student and sensei, kouhai and senpai, teaching something more everlasting, deeper and valuable, powerful and insightful than just 'how to rain muscles'.

Many people have problem with understanding that this movie is not about muscle training, it's about deeper spiritual lessons and understanding the core of what -really- wins fights, and in life. You can train your body to the max., and yet lose to a fighter with stronger spirit (I think this happened in some heavyweight boxing match, where someone a bit fat lost to a boxer with extremely trained body).

The tournament part is about strength and focus of the mind, not about physical training, muscles or the body.