The answer is Ultraviolet Light
The easiest way for us to obtain a sustainable amount of Vitamin D is by exposing our self to morning sunlight ( which contain ultraviolet light)
Often time, we don't consume enough vitamin D and our body need to get it from our bones, and in order to do that, it need to be activated through enough exposure from sunlght
<span>So all muscle cells contain a high-energy compound called creatine phosphate which is broken down to make more ATP quickly. so it takes about </span>8 to 10 seconds
<span>More than 80 percent of adults do not meet the guidelines for both aerobic and muscle strengthening activities found in Healthy People 2020.</span>