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Well if you regularly workout a lot from day to day, you are probably fit for your age, depending on what type of lifestyle you live. Some of the following could be, increased muscle capacity, healthier lungs, increased stamina, things in that area.
Answer:
The answer is gastroesophageal reflux disease (GERD.)
Explanation:
IDK how to explain this, it has been a long time since I took biology. I hope this helps and that you have a magnificent day!!!!!!!!!! Stay safe!!!!!!!!!!!