I do warm up, but I think the size of my legs is a big factor. I didn't think about the sitting version. I have had some success with putting my foot in a chair, but I was afraid that that was the wrong way to do it.
Try stretching the hamstrings first (touch your toes) since they are the muscles cramping. A modified version of the quad stretch is to sit on your heels and then lean back. I find this easier to control the stretch than the standing version.
When I try to do the stretch where you lift your foot behind you and then grab your ankle to stretch the front of your thigh, the back of my thigh cramps up before I can even get my foot in my hand. Any way to make that not happen?
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