Andrew > I don't believe they are doing intense lifting. One person's intense is another person's warm-up. For myself, after doing a few sets of heavy squats, I get so hungry I could eat vegtables.......

I am absolutely doing heavy lifting.  One set of 8-12 repetitions to exhaustion for about 10-12 exercises.  Two workouts a week.  High intensity protocol, it's called.  I believe this best reproduces the exercise habits of our male hunter ancestors.  I believe the females as gatherers did less high intensity stuff.
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