Answer:
When we're babies.
Explanation:
When you're born, all of your bones are almost completely formed out of cartilage, and you have approximately 300 of them. Over time, your bones begin to fuse together and solidify into pure bone. When your born about half of your bones are solid cartilage and the other half is a mixture, that usually applies to your bigger bones like the bones you have in your legs as they have to be at least partly solidified enough for you to function
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Answer:
Stretching increases your range of motion and prevents injury and muscle strains. “Adequate warm-up has been shown to lower risk of injury for land sports and water sports,” says Weber. Water safety: Wear a life jacket when you're on or in the water. Even the best swimmers can become fatigued and get into trouble.
Hope this helps, brainliest please?