Your heart rate and blood flow increase with exercise. Photo Credit IT Stock/Polka Dot/Getty Images. There are a variety of physiological reasons why more blood travels to your muscles during exercise, which allows you to exercise at optimal levels.here are a variety of physiological reasons why more blood travels to your muscles during exercise, which allows you to exercise at optimal levels.
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Just the basic facts. An Amazon Prime membership will set you back $79 per year. You can start with a one-month free trial, or if you're a student or a parent, the Amazon Student and Amazon Mom programs offer other benefits. (We'll get to those in a little bit.).One membership can be shared with up to four additional people, so you and your family can all receive the membership for one yearly fee.et your stuff fast for less. Super Saver Shipping is great, but there's a $25 minimum order to qualify and it can still take five to eight days to get your stuff. The biggest benefit of Amazon Prime membership is free two-day shipping on most orders, which can pay for your $79 yearly fee after only a handful of orders.