Re: Riding isn't an exercise?!?
My GP once told me riding isn't exercise! We were laughing about this whilst watching a very fast and furious group lesson last week - 6 very good, fit, adult riders being put through their paces! They were all exhausted by the end of it (horses were puffing a bit, too!
)
I thought the definition of good exercise was that which raises your pulse rate for a sustained period - which riding certainly does! Ask someone who doesn't ride to mimic on the ground the movement you do in rising trot for more than a few seconds! Unless they already do some targeted leg work, they won't be able to, I bet! When I started pilates again recently, I could do things with my legs that the instructor couldn't do
, because they are so strong!!
My OH is a bit of a fitness expert and says he always thought 'you just sit there' 
Untill he came to watch me! He says it is very good exercise - core muscles, legs, heart/lungs etc. As well as getting you out in the fresh air and having fun (most important thing - you won't continue doing any exercise if you don't enjoy it!)