In a slightly alternate scenario, Sharah gets trapped living in a city and is unable to go back to her home in the desert. As time goes on she tries to continue offering her services to people. Eventually becoming real homesick, she starts to lose herself a bit and starts to get real hefty. Eventually she is found by old friends and is set straight when she is able to get back to the desert.
She's still is quite strong though but unlike someone like Gorem she isn't accustomed to her weight and tires out easy, among other things.

Credit goes to BigLoveAlicia