Inclusion Criteria:  Traumatic and non-traumatic SCI; > 1 year Level of lesion: C2 - L5 AIS score A/B/C/D Age: ≥ 18 years Urge to reduce defaecation time  Exclusion Criteria:  Patients during primary rehabilitation Bladder stimulator Autonomic dysreflexia by application of ES of the abdominal wall Pregnancy: test in women of childbearing age (15 - 49 years) Opioid use Inflammatory bowel disease Cancerous tissue in abdominal region Patients' inability to follow the study, e.g. mental-health problems, language problems, dementia etc.