I agree that practicing skills such as riding in the rain, the wind, traffic, is very useful. However, I think those skills can also be obtained on shorter rides and avoid five hours of suffering outdoors - esp if the goal race is in a decent climate. If she were training for shoulder season races in crappy climates, then I would say be outside all the time.
All that said, it really comes down to each of our personal preferences. I live in a big city and get frustrated with traffic interrupting my workout. I love sitting on the trainer with zero distractions - but conversely, I absolutely hate the treadmill!
All that said, it really comes down to each of our personal preferences. I live in a big city and get frustrated with traffic interrupting my workout. I love sitting on the trainer with zero distractions - but conversely, I absolutely hate the treadmill!