<qa>  What is the minimum length of spinal cord lesion between T3-T12?- Complete spinal cord lesion between T3-T12, of at least 1 year duration. Age between 18-65 years No significant medical or psychiatric complications assessed by clinician. Sufficient range of motion at the joints assessed by therapist. No excessive spasticity assessed by therapist. Bone density in necks of femora and upper tibias 40 - 60 mgcm3. Willing to attend the clinic and to exercise at home according to the training programme. Having space at home to set up the tricycle ergometer for frequent use. 