The interior color scheme is cool, and the use of black metal frames for the bar chairs and coffee table help to create a light and airy room. Rugs are very useful in home decorating. Not only do they give interest and provide a soft surface to walk on, but they can also 'mark out' areas such as this one.
On a treadmill, you can accurately set your incline by 1%, 2%, etc. When walking outdoors, you need to use a tool such as MapMyWalk.com to map out your walks and see what the incline really is. I can tell you from experience, that a 5% incline is a real huffer-puffer. 1  for every 1% of grade, you increase your calories burned by about 12% or about 10 more calories per mile for a 150 pound person.  By the time you are at 10% grade, you are burning over twice as many calories per mile.
A person weighing 160 lbs. will burn 102 calories walking up and down stairs for 10 minutes. By running, the calories burned will increase to 191. For a person who weighs 200 lbs., walking up and down stairs burns 127 calories in 10 minutes, while running the stairs burns 239 calories. Benefits Stair climbing builds endurance and strengthens muscles.