Anyone planning to travel to Myanmar to train Lethwei needs to plan around the situation since the February 2021 coup. This article deliberately gives no flight routes, visa rules, border crossings, exchange rates or prices: the site has no source for them, and conditions on the ground can change faster than an article can be updated.
Entry requirements, safety conditions and travel options should be checked with your own government's current travel advice and with Myanmar's official channels before you book anything. The travel guide lists what to check and where to look for current advice.
The gyms guide names the Lethwei clubs that published sources mention, and says plainly which details are not documented. Before planning a trip around any named club, confirm with the club directly that it is open and accepting visitors; this site does not claim that any gym is currently operating.
Etiquette matters as much as logistics. The travel guide covers basic courtesy for visitors, including how to behave around religious sites and the advice to leave political topics for local people to raise.
What this means practically: read the travel guide and the gyms guide, check the equipment guide for what you would bring, and verify current conditions independently before committing to dates. Treat this site as a starting point for those questions, not as an up-to-date source on entry rules, safety or costs.