This is subject to a lot of misunderstanding. This is generally said and written out of concern for babies and, in a nutshell, boils down to the fact that a baby car seat such as a Maxi-Cosi Citi SPS or Maxi-Cosi Cabrio(Fix) and Maxi-Cosi Pebble should not be used excessively. Children should not lie in a fixed position for too long unnecessarily. They must be given the opportunity to develop their motor system and arm, back and neck muscles. As manufacturers of the first car seat for babies in Europe, the Maxi-Cosi, naturally we have been including this in our instructions for many years. So do not place a baby in his or her seat for the entire day for reasons of convenience, but give him or her the opportunity to develop. This also applies to front pack carriers and all other products in which a baby sits, hangs or lies in a stationary position. However, this is not problematic whatsoever when taking a relatively long car journey or holiday trip once in a while. Our advice is as follows: stop once every 2 hours. After all, the baby must also eat and be changed on a regular basis.