Multiple Sclerosis - Using the Stairs Rob has been using e-stim to improve Vlad’s muscle response and control, leading to working on using the stairs for the first time during his visit. Going up and down stairs relies on lower body and core strength, balance and a control of specific muscles. Sometimes, our clients can be their own toughest critics - focusing on how certain parts of the process aren’t quite perfect, yet. But that’s exactly what neurorehab is: a process.