I enjoy running. My freshman year at MIT, I ran the Boston Marathon as an unqualified bandit runner (the term "bandit" is used for those non-registered runners who don't qualify or who want to run the marathon at the last-minute). Of course, it takes a lot of training to properly prepare for a marathon. As for me, I was a freshman and I wanted to do something fun since it was my first time living in Boston. I did all my running outside along the Boston Esplanade and I certainly didn't need a treadmill.
Now, I run at the gym and sometimes I'll go for a run outside. At my local health club, they have many different types of treadmills. I'm constantly amazed at these workout machines that get introduced. Technology has come a long way in the area of health and fitness machines. At Smooth Fitness, you'll find an assortment of treadmills, ellipticals, bikes, and other workout machines. Equipment technology has advanced and I like how newer equipment can now be linked to a heart rate monitor so that you can evaluate your intensity. It's also a safety issue for older people who exercise on routinely.
When I'm at the gym, I tend to use the ellipticals because they are easier on the joints. I'm spoiled because I get to choose from many different machines what all have different features that you can change like elevation, resistance, angle, etc.