Rehabilitation in Valens includes intensive strength and endurance training. Endurance and walking improve in most patients, evaluated during rehabilitation with the Timed-Up and Go (TUG) and 2 minute walking tests (2MWT). However, Clinic Valens occasionally gets feedback from physical therapists in the ambulatory setting, that outcome after rehabilitation is sometimes poor and some patients with MS (pwMS) seem to be over trained, less mobile, more fatigued and need to recover for several weeks. Physical therapists in Valens know that training is fatiguing. If they knew how many, and which patients are more fatigued and less active after rehabilitation they could reduce treatment intensity and prevent overtraining.