It's also really hard to feel that you are ignoring a horse, a living thing that is pretty dependent on people for its exercise and general well-being. I often feel bad when I feel that I am ignoring my dogs, or not exercising them enough, because of training or kayaking, even though they are pretty old, still, sometimes I'll devote an afternoon's walk on the beach with them.
I spent a large part of yesterday at an ocean kayaking class, and felt that it affected the organized (100K) ride that I did today; it's amazing that you use thigh muscles to paddle!
The bicycle is the most civilized conveyance known to man. Other forms of transport grow daily more nightmarish. Only the bicycle remains pure in heart. ~Iris Murdoch, The Red and the Green