That's the hard part is those first few times of getting off the couch and exercising.. at my heaviest i was 250#.. i lost 60 in 4 months on keto.. but had to stop cause i got too skinny. I will say the difference from 250>185ish is amazing... oh it's 90 out.. and i'm not sweating at all and feel great, at 85 degrees i was like.. well i'll be inside all day in the AC today :)