Is it good if I do it at the end of my taekwondo workout or before I go to sleep as my cycling coach told me strenght exercises are best in evening before u go to bed, so body can rest and adopt. When I do them in weekends do I need any warm up before and another issue. When is isometrics when muscles start to hurt. As last time happened to me I could streech more but didnt feel any strong pain. What leve should I begin with if around 8-10 inches are missing to the floor, when I am at max position. But as I told before, after my pads kicking I feel so not streech all tough and unflexible. When we have sparring I am flexible the most. I have to take this method or when I arrive to korea YouTube - Taekwondo Groin Tears this is waiting for me. I prefer your method. enjoy