Responses and reliability of candidate intensity measures to different mental and motor load levels of an upper limb exergame in children and adolescents with neurological diagnoses

Changes in motor intensity were better captured than changes in mental intensity. Combining HRV, %ACmax, and NASA-TLX effort could offer a multidimensional approach to quantify therapy intensity. However, many measures lacked sufficient reliability or feasibility for clinical implementation. Further research is needed to validate these measures in real-world therapeutic settings and clarify their relationship to individual capacity.