There are various practitioners who describe themselves as “Kinesiologists”. However, to be a full member of ICAK, of which the UK has it’s own chapter, there is a minimum undergraduate training requirement, which is, “a single professional education with a minimum of 3500 hours and a degree such as DC, DDS, PPM, MD, DO, PhD in psychology. An absolute requirement is the licence to diagnose.”
In practice that means, in the UK, most members are osteopaths and chiropractors, though the chapter also includes medical doctors, acupuncturists and other practitioners with appropriate undergraduate training.