I'm going to be the big 30 this year. I know I know, hardly ancient, but as I've gotten a bit older I've notice some things:

1) My body takes longer to recover from intense training

2) My body takes longer to get over injury

These are fairly small changes, but just some things I noticed. How has your training changed as you've gotten older? Did you have to alter what you do? Spar less?

Did you have to change martial arts altogether? I've known some Judoka for whom Aikido is some sort of "retirement" MA they go to when Judo training gets to much for them and they can't do Judo anymore!
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"Let your food be your medicine, and your medicine be your food" Hippocrates.