thanks - I do feel much better when I exercise, and also much clearer (which, for me, equals more intelligence in practice). I've been getting back into exerci

thanks - I do feel much better when I exercise, and also much clearer (which, for me, equals more intelligence in practice). I've been getting back into exercise over the past few weeks, but I've found I have to ease into it gradually, or I get sick. I'm up to 20mins, 3 times pw. I'll keep in mind that level you you mention, of 30mins, 3-5 pw