Felt just fine.
Did 600 about a month before and 300 similarly some month before that.
Not all at once, but in spurts of 20 to 60, mostly 40 every 4 - 10 min apart or so. Stopped for dinner and our usual TV programs in the evening and another 150 or so before bedtime.
No video just made a running time and count record on paper.
On line, others have done more but most/all are younger.