^don't know if that's the case really. speed, strength, and agility are not a problem, but as far as endurance... find myself having to tap into indomitable state of mind to bite through the windedness that comes rather quickly, and the groggy mind that can come shortly after if not practicing while out in bracing cold. so like, currently, during control contact sparring indoors, can keep a single opponent of similar ability backing up against the walls for the first ten minutes or so(probably much longer than any average defense scenario, though, that time could probably easily be quartered or cut to a fifth by the addition of another person), but after can't really keep up for more than thirty minutes beyond that at much more than maybe 40% capacity, and after that, my body and mind become rather useless for much more than sluggish blocking or choosing where to take hits.
it probably has more to do with my forced diet rather than my actual endurance though... that, and that my personal take on current taught techniques is more physically demanding and draining, yet from implementing past knowledge of studied anatomy and physiology, is quite rapid and ergonomic in movement(so, the rapid and many strikes in a short span of time quickly tax energy reserves) and doesn't seem to sacrifice strength or discipline of form(thinking to read up on jeet kune do for further inspiration, after having only recently having heard of it... ideally, want to devise a teachable rapid blocking/deflection system efficient enough for use to defend against a group.). also, my digestive health and it's sensitivities/intolerances seem to limit me to a low fat, non-sulfuric, protein heavy diet(thinking it's a gallbladder issue)... so useful calories are quite hard to find on my low income. probably only get like 800-1200 calories a day if there's rice or potatoes around(can't seem to eat much for breads, crackers/chips, or most grains or corn in general without feeling sort of inebriated, and a cooked fish filet or steak is typically only like 200 calories), and should probably be eating somewhere over 3000 with my dangerous metabolism, and at this point, probably don't have much body fat left which might not be a good thing since the brain runs on fat.
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七転び八起き