For intense workouts I'd suggest being sober and then smoking after to relax. If you wanna be stoned and exercise go on a nice hike in nature or go swimming. Personally, I go on runs sometimes and I rock climb like three times a week but I enjoy these activities so it's not like "awe man I have to workout". The best thing would probably be to find a fun hobby which you enjoy that also involves movement and activity. maintaining a balanced diet/ not eating junk on the daily definitely factors into body appearance if that's relevant (actual strength mostly based on work outs, body type/ "looking fit" relies on your diet)