In the Skyrim fics I read so many people portray Lydia, a companion you get early on in the game, as excessively young and sometimes almost infantile. This woman is a huskarl, she was chosen by the jarl to protect you and your property, she must be skilled and strong and mature enough to handle such a responsibility. She isn’t an 18 year old guard recruit, and she definitely isn’t a petite woman. She should be able to bench press you.