Lately, I've been going to the pool twice each day in order to split our standard 3000 yard workout into two managable blocks. The main reason is that my schedule is such that it's easier for me to find two hour-long blocks of free time each day, rather than one long block. I go early in the morning, and then again later in the afternoon. I swim every day, but I go twice about two or three days each week. I've been swimming about 12000 yards a week.
I'm fairly new to swimming -- about 18 months. I've yet to compete except for an open water race (Tiburon Mile) last month.
Am I overtraining or doing myself harm by going twice a day?