I'm looking at using Kinovea to analyse runners on a treadmill in a podiatry clinic and would like some advice about cameras.

• The room containing the treadmill is small (roughly 3m x 4m).
  I would like to use two cameras at the same time, one from the side, one from behind.
  I need the cameras to work in real-time, as well as be able to analyse the recordings after.
  Ideally, the cameras would be wireless, but this is not essential.

I'm not at all technically minded, so some basic advice would be appreciated. I wondered whether something like a GoPro might work well, or an iPhone/iPad, or something different altogether. Any advice would be greatly appreciated.