To experiment with data and movement I mostly use smartphones, there are a lot of sensors in them and if you use an app like zigsim you can send all the data to the computer using OSC data. 

For example I connected my smartphone to one arm and the smartphone of the performer to the other arm and than used the data in isadora.

Then after experimenting, you know what kind of data you would need and than you can look for that specific sensor.
For example if you find out acceleration is the most interesting one. you can use an acceleration sensor, connect it to an arduino and send that data to isadora. I'm currently using ESP32 boards and send OSC data over the network. Its not a lot of programming you just read the data from the sensor and send it over the network using OSC.