hi,
as you mentioned you have pain in your let's I will make a small understanding here. what happens is, when the muscle is weak the
metabolism is faster and the
fatigue in the muscles occur faster . which leads to the lactic acid production and later a pain.
performing regular exercises and progressing from mild to moderate to severe levels is needed. also a need of endurace training is needed to improve the cellular mechanism.
Since the pain is not lowering down and constant it is, I will like to know the nature of the pain, if it is like burning,
numbness, radiating, etc then you should take the MRI of
lumbar spine as the
nerve may be getting trapped in the spinal column.
for this you can improve the strength in your core muscles by performing core stability exercises and spine Strengthening exercises. Also strengthening the hip muscles is of importance as the stronger the muscles is the better the venous return.
Exercise is a slow a steady process which will consume alot of time for getting progress. You may need to even improve you cardiovascular response to exercise as it will even help to maintain the hemodynamics of the blood and help you perform well. including cardiorespiratory training is good for lungs and to improve the
oxygen levels in the blood for
detoxification.
you can discuss the same with your vascular surgeon
with the grace of God I wish you a good health.