Is it safe to weight training exercises in the gym? completed 4 months of tb treatment can tb relapse if i loose weight that i gained during treatment

Should be safe: It is felt that a person can remain contagious for several weeks after treatment has started, but by 4 months, you should be safe to go to the gym. Your treating provider is better able to advise you. You should not be at risk for relapse if you resume pre-treatment normal weight; becoming underweight might be a risk for relapse.

No bearing.: As long as you complete your recommended antibiotics, your TB will be eradicated regardless of weight training in the gym and regardless of weight gained or lost with exercise.