"Riding with the dog"
I ride quite a lot with one of our two, they're both the same age, but the staffieXenglishbullXrottweiller (Moog) doesn't have the legs for it anymore, he just likes to pootle around at a slow pace. The staffieXpekingeseXamericanstaffie (Trip she's a very odd mix but that's birmingham dogs' home for you!) however still absolutely loves to run for hours on end! Cycling proved to be a really useful training tool for draining the energy out of her when she was 12mnths old bouncing off the walls and its really good fun.
I do miss being able to go out with both of them at the same time! I'll either take trip out by herself on the bike of if the four of us are going out together I'll often bring the bike along and my other half will keep an eye on the old lad whose priority is sniffing & pissing on all perimeters and tall things, whilst I zoom around with Trip.