Physical, medical researches
Blood tests
MRI scans and some more scans
And researches with sensors over the whole body which will show all kinds of important things

And researches with measurers and detectors
Radio frequency spectrum analysers, acoustic spectrum analysers which also measure infrasound and ultrasound, vibration measurers, electric field measurers and magnetic field measurers

And researches with schlieren optics and shadow graphs to make air and gas flow visible