We have always pulled our daughter's seat belt until it clicks. When the seat belt is released, it goes fairly tight against her body and does not move around. When being driven by a friend's parent the other day, he said to her (and to his own child) that it was better not to activate the lock because it increased the chances of broken bones.
I thought that may be true at lower speeds but that the chance of death from a higher-speed accident would be greater with a looser safety belt.
Well you want to ensure that your child is indeed comfortable in their seat belt. If the seat belt is too tight then you may need to look at getting a seat belt adjuster. They aren't all that expensive to purchase. Now as it relates to a potential accident, your child could actually sustain greater injury if they are belted in too tightly. A loose seat belt does cause damage as well, but if you were to get into a major accident and the seat belt is too tight on the child then broken bones could be a result. The reason why is because in an accident your child's body should move forward in the event of a crash. If there isn't enough room for the child to move forward in the crash then the child could break ribs, or any other bones in the body from being restrained too tight. Moving forward is important because it takes the strain off of the child. The best option is to get a seat belt adjuster to ensure that the child is neither too tight or too loose. You want to find a middle ground to ensure the best comfort and safety.
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