I have a L4/L5 and L5/S1 issue, which has caused me massive pain for the past 10 months. I have been told by my physio to cycle...I go to the gym and cycle for 25 min but I am not sure how I should be sitting! I sit straight up no bending forward. My right leg has nerve pain when I start and then it will ease. The real issue and always has been calf pain in my right leg, which never goes away. Does anyone have anything simiular? Can you advise on how to sit on the bike for instance? Many thanks.