EMWA. Sleeping lots while undergoing heavy training can be both cause and effect. If you are sleeping lots, recovering, and feeling more fit, that’s wonderful. I don’t know how old you are, but when I was younger I found myself particularly able to absorb hard training with sleep. On the counter, really hard days can sometime make one sleep restlessly. Good sleep hygiene, with consistent bed and rise times, caffeine caution, rituals/etc can help you better monitor if you are going in right direction. Pro endurance athletes sleep tons. Chicken and egg. Tom