The bigger someone is, the more damage they can do to themselves through even a relatively innocuous accident. Despite toddlers falling over and bumping themselves regularly, the injuries they sustain are rarely serious. ① Their relatively thick bones in comparison to their mass mean they rarely build up enough energy, even at top speed, to do themselves much damage. ② Because of their increased mass (compounded by the fact that they are falling from a greater height and that their reactions may be slower), adults falling over will impact the ground with a much larger force. ③ The nonlinear relationship between mass and bone strength means that although their bones are thicker than a toddler’s in absolute terms, they may not be relatively thick enough to compensate for the larger impact caused by their increased mass. ④ The body mass index (BMI) can serve as a convenient way for non-experts to examine their health conditions in daily lives. ⑤ For the same reasons, taller people have been found to suffer more fall-related injuries ― like hip breaks ― than shorter people.
* innocuous: 무해한 ** toddler: 아장아장 걷는 아기