Standing toe touches, military presses, standing quadricep stretch, double leg raises, and full sit-ups are all contraindicated exercises. Some instructors and trainers do not feel this way. Do you still teach them? Why?
??? If it is contraindicated… then there is probably a reason, so, no. The exercises you mentioned are not feasably contraindicated at large. I teach full sit-ups to my pre/active military clientele as it is a job requirement; also, standing toe touches to dancers.