What is the dependent variable when collecting data using the emg sensor?

Emg is a muscle contraction sensor correct? For sensors, usually the independent Variable is Time or something you set, like mass or current. And the dependent variable is whatever you are measuring. In this case it's EMG or how much muscle activity is needed for a workload.

Children under the age of 13 have extra privacy settings on their devices. This allows parents to monitor who and what a child is doing/talking to by restricting the access to certain apps/sites