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Is there any flexibility tests I can do, to figure out wich muscles are tight?
thanks
for example: If you cant keep your back arched while doing deads you have tight abs/glutes/hamstrings.
that doesn't mean that the hamstings and abs are tight all the time. It might mean that the errectors are weak, if the lower back is rounding. It may be tight hamstrings pulling the pelvis posteriorly also though.