How tired am I ?

Did another 3 hour workout today at the leisure centre in Carn Brea...Body Combat, attack, Jam & balance...now Balance is a mixture of Yoga & Pilates, and although I love the music and the flow, its a killer if you have a bad back as most of the moves are advanced...and gthey change the routine every 3 months so you dont get bored, fair enough, but most of the ladies in the classes are going to get relief from back pain, or have issues that can only really be resolved with a balancing of the musclesd in their body, bettering their posture, and thats Pilates...in a nutshell...now if I get up in time tomorrow(Sunday) Im off to a Body Balance class, and will ask the teacher for a modification for one of the moves as its tough on the back and I dont want to do that move...DONT TRY THIS AT HOME!!!! But its lying on your back, both legs straight in air, (abs in of course...) now slowly lower both legs to the right and hold, back slow to centre then opposite side, hold, repeat..ouch...if theres no modification then Im sitting it out and will not be going back, may even revoke my membership as Im going less and less now and doing Pilates more and more and seeing it makes more sense to do Pilates, and you get a great workout once you progress further and use the Circle, bands, ball and even the Reformer, but thats next year!