Do force-sensing resistors draw current?
A strain gauge is a resistor whose resistance alters when force is applied to it: -



It might alter its resistance by up to 10%. To measure that resistance change you can use a bridge (shown below) or feed a constant current into it or just use another resistor and a voltage supply: -



In every application of using a strain gauge, you have to have current flowing through the device in order to be able to read its value and hence compute how much strain/force is placed upon it.

So, usually in strain gauge applications the current is roughly the same whether mechanical load is applied or not.