Hi everyone Am hoping for some fitness advice on improving my kicks (side, front, back, twist). I'm relatively new to martial arts having started as a white belt Oct 2016 with no experience in kicks etc. I've just graded to a yellow belt and the kicks now need to be above waist height. My problem seems to be opening my hips as I can't seem to raise, hold or kick either leg very powerfully at all. Last lesson I also became very light headed and nearly fainted having had a lesson focused on kicking (I had eaten plenty beforehand, although it was really warm in the dojo which may explain some things but not all...) - does kicking affect blood pressure much? When speaking with my teacher, he said although I may be fit otherwise - I run regularly and attend a circuits class plus lots of yoga, I may not be doing the right exercises for the more explosive intensity of training that is needed during my class with him. Are there any really good exercises I should be doing to stretch, strengthen and improve my cardio? My job is sedentary, working in front of a computer all day which can't be helping things. Any advice very much appreciated, as I really want to learn and improve in my practice (and preferably not pass out whilst doing so)! Thanks so much.