I'm pretty sure that its either illegal or prescription medication
Not sure check on yahoo answers
If you pull too wide you could start sinking and it can mess ur swimming up
The answer is they may slow down or even stop!! hope this helps u out
Answer:
blood pressure levels
normal systolic: less than 120 mm Hg diastolic: less than 80 mm Hg
at risk (prehypertension) systolic: 120–139 mm Hg diastolic: 80–89 mm Hg
high blood pressure (hypertension) systolic: 140 mm Hg or higher diastolic: 90 mm Hg or higher
hope it helps <3