We are told that good running should also activate the glute and muscles back and below there. The more I have tried to activate and unlock power from the glutes and back thigh area, the more problems I have. First I did strength training like hip thrusts and later i have done deadlifts. I have done this for a while and for sure I guess the muscles get stronger, but they also get "irritated" to the degree they irritate the sciatic nerve giving stiffness down in the back thighs. I will not stop strengthening them cause at some point they should be strong and robust enough to not getting "irritated" and tense from running fast, but there must be more to the equation.
There is also talk of short hip flexors from sitting and anterior pelvic tilt. I do not have the latter, but I might have short hip flexors that eventually gives similar problems when I reach good hip extension and then maybe tires the glutes too much.
THe good thing about stiffness and aches is that i get good feedback on what running form increases irritation and what eases it. The more effortless and sound, the easier on the muscles, I feel.
Anyone with tips on how to reduce these annoying problems? Should I increase flexibility or strenght of some specific area to improve? Should I stretch hip flexors or glutes in some way? Someone said that muscles should have the right amount of flexibility, not too short, not too lose. I am not very limited in flexibility in the glutes, but maybe more in the front side of the hips.