Problems on holiday walking getting through airport and then sitting in aeroplane able to do stairs but problem with slopes. Affects left leg more than right and feet start to flap can get further by sliding feet until unable to move legs and body goes forward and often fall as cant straighten back had laminectomy over 20yrs ago for prolapsed disc and spinaj stenosis. Problem occurs when travelling mostly and outstde my normal parameters painful spasms but have to stop and rest because of seizing up .
Hi, thank you for providing brief history of you. Since you mentioned that you had laminectomy and spinal stenosis with prolapsed disc. There may be chances of nerve in the lower back which is having a signalling disturbance. Try doing some gluteus strengthening exercises as the hip joint needs to get stability. This you can perform by lying down on your back and lift the leg up. Once you finish your travel kindly meet an orthopedic specialist. He might help you and even may ask for a fresh MRI of spine. Having a close view of the spine is important to plan further treatment. With the grace of God I wish you a speedy recovery