That was me!! :]
Well... When I said I ride about 2 hours a day, that's when we have daylight savings. Sometimes we ride for longer as well, but it's not all intense. We go for long sustained trots and canters, occasional gallops, mixed with periods of walking. It's really good fitness work, and for mounted games and polocrosse I need a very fit horse. On the weekend if I'm not competing we will go on long trailrides, sometimes 5-6 hours. We'll stop at a creek or something for lunch and a swim.
In winter however, I don't finish work till four thirty and it gets dark at five thirty, so I can only ride for about 30-45 minutes safely, as I don't have an arena or lights. And trails next to raods in the dark isn't so much fun!