You can buy gear for running at a sporting goods store. Most sporting stores will offer a lot of running gear from running shoes, sweat pants, and sweatshirts.
Men's running pants do offer an advantage. They will be looser and provide more room for speed. The more pants cling to you, the more of a strain it puts on your legs. You can purchase these at wal-mart.
There are lots of places to buy running gear online. You can get some from http://www.womensathleticpants.net/buy-cute-womens-full-length-running-pants-online
http://www.runninggearworld.com/men's-running-pants/ has an excellent article on running pants and why they may or may not be beneficial. They also discuss what types of running pants are best depending on your circumstance.
You can buy black running pants online from ebay or amazon, being websites that sell general goods they would have a lot of different types as well for your consideration.
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A good place to find tight running pants would be an athletic outlet such as Sports Authority, Dicks, or Herb Phillipson's. You could also try online retailers such as Amazon.
I prefer Jazz pants when I go running because they are stretchy and can breath, and also very cheap. You can get them at any local dance store. They also come in a variety of colors of different types
There are many places where you can find reasonable running pants online, but amazon.com is probably the best place. You ca read reviews of the products you'll buy, and the prices can be very reasonable too.
Top website for running pants would be roadrunner.com. They offer some of the most popular brands of pants and tights for running at very affordable prices.
Try out runnersworld.com, they have a huge variety to choose from, have fun browsing and hope it helps out some.
You may buy new Nike running shoes at one of the following sites...www.myshopping.com.au/PT--240_shoes_Nike_Medium_Heel_Run or www.finishline.com/ Good luck with your running.