Answer:
When you first wake up.
Explanation:
This would be before you consume anything that could cause your heart rate to go up, such as caffine, sugar, etc... Your heart rate will be at its resting BPM. (Beats Per Minute)
Vaccines PERIOD, because the vaccine has a little bit of the disease in it to build up you immune system. Which is why you get them yearly like the flu shot.
<span>The answer to this question is B embryo.</span>
Walking Take a rest. no weight lifting this prevent
Blood is blue before it reaches oxygen. this is why your veins are blue