Here in the US, there are over 15 different names people call Dachshunds derived from shortening the name, misspellings of the name, and “cute” name references.
If you live a sedentary life and don’t take them out much, they probably won’t be fit and may get used to lazing around.
If you are active though, and slowly increase activity to build their fitness (just like people should), they will probably shock you with what they can do