Did my third on Thursday since the new year and that's after a 2 month break due to a twinging lower back. Should have attempted to do light stretching whist I was away from training as I'm suffering now!
My Sensei specifically tells us not to do that. You're telegraphing a spinning attack and against a good counter puncher you'll end up with a hole in your back.
Practice by performing the turn then execute a mai geri before thrusting your leg backwards for the ushiro geri. That way you're ensuring you're upright before the the ushiro geri.
If you successfully complete your combinations, bassai dai, ju ippon and ju kumite then you'll be asked to step forward and will be given a final kata, either a heian or tekki shodan. You won't get a choice.
3500kcal is equivalent to around 1lb of body weight so for an average person with no medical issues to lose weight at a rate of 1lb per week they would need to create a deficit of around 500kcal per day from maintenance. I dropped from around 14st to 12st around 3 years ago using that logic with a constant deficit created either through a drop in calories when on a day I wasn't training or aiming for around 500 calorie usage when training. Losing weight for an average person is a pretty simple thing to do, as long as you have willpower and no excuses (most people have no will power and a boat-load of excuses). Many people I know also choose not count alcohol consumption in their diet which at 7kcal per gram certainly adds up!
Snap! Whilst I do love sparring I don't use it as an excuse to beat people up. I'll generally up my game when sparring with more experienced members and lower it when sparring with less experienced. That way we all get something out of it.
I pay a license fee to the KUGB annually which is required to grade, enter competitions and enables you to participate in any of the free courses offered over the year. It also functions as a record book for your grade and does indeed offer limited insurance. I also pay a second fee for club membership which goes towards the running cost of our club.
Maybe you thought it just wasn't worth the hassle? I'm sure if the guy had approached you then the situation would have changed and your instincts would have taken over. You did the right thing anyway, don't over-analyse it.