I've been involved in one type of physical exercise or another for the better part of my life. Being from the Midwest (Nebraska) I was heavy into power lifting, wrestling, FOOTBALL and cross country skiing. After watching my first Aikido class I thought, hey, I'm in great shape, this should not be a problem for me. WRONG! four years later I still feel it the morning after an advanced class. I believe the beginner in Aikido gets the best "workout" primarly because they have not learned to relax yet.
But in short, yes, I believe Aikido is a great all around body exercise! (Not to mention what it does for the spirit! )
TRY IT YOU'LL LIKE IT!
train hard, train soft, whatever, just train!