I have been going to the gym and doing most of my time on the treadmill. I listen to headphones and it makes the workout not seem like it lasts so long. I have the iPhone 5s and I tried out a Running armband for my style phone.
This is really comfortable and fits my phone great, It fits on my arms just fine and I have thin arms also. The price is great and you can get this in hot pink as well as black. I love that you ca out a key into the pocket but I will fold up money and slide it in there instead.