Hello sir...first you need to consult orthopaedic to rule out lumbar spondylysis and nerve compression, vitamin b12 and vitamin D levels.
Weight loss does reduce back pain. Ideal body weight for your height is 72. Need to lose 10 kgs.
For weight loss reduce your junk, bakery, sweet, fried and include salads, raita, buttermilk, sprouts, egg whites, less no. Of chapati.
Sugar, sweets, bread are known to increase inflammation so suggested to avoid it completely.