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More oxygen is also going to the muscles. This means the heart beats fewer times per minute than it would in a nonathlete. However, an athlete's heart rate may go up to 180 bpm to 200 bpm during exercise. Resting heart rates vary for everyone, including athletes.
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Is there any context to this? Is there a short story or smary before the question?
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Examples of stimulants are dextroamphetamine (Dexedrine, Dextrostat, ProCentra), lisdexamfetamine (Vyvanse) and methylphenidate (Concerta, Daytrana, Methylin, Ritalin). Common examples are caffiene and amphetamines.
Stimulants is an overarching term that covers many drugs including those that increase activity of the central nervous system and the body, drugs that are pleasurable and invigorating, or drugs that have sympathomimetic effects.
Stimulants were first used to treat asthma and obesity. Today, they're also prescribed to treat problems such as ADHD, ADD, depression, narcolepsy, and other problems.
The answer is (A) because if your joints are not "flexible" then you may tear something, break something, or strain something to the point of failure.
Answer: N/A
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