I use an old Canon Rebel XTi (often with the 18-55mm kit lens) when I'm out hiking/trail running. It is attached to my backpack or running vest shoulder strap

I use an old Canon Rebel XTi (often with the 18-55mm kit lens) when I'm out hiking/trail running. It is attached to my backpack or running vest shoulder strap using the Peak Design Capture Clip. To prevent bounce while running I use a simple velcro cinch strap. While not particularly great at taking pictures with either a phone or camera, my camera photos are always much better quality than the ones I take with my phone, especially if I am looking at them on anything other than a phone.