That deep ache

Obviously, my muscles aren't used to this. I almost never feel any aches when I'm running. Unless I'm doing really intense intervals, the bike is almost refreshing. But this swim thing, it exhausts me mid-workout.

We are definitely in a volume block right now, and I'm considering this an opportunity to become intimately familiar with every muscle in my back and shoulders. It's not a sharp pain, just a dull throb that says, "Hi, I'm a rhomboid. And I'm tired. That big guy over there? He's a latissimus dorsi. He's tired too. I would say it's a pleasure to meet you, but you seem to be working us pretty hard considering we just met."

But at least they're willing to make their presence known for a while. They'll start drawing attention mid-swim, and keep calling for attention for hours. "Hey, just us. Trying to recover. Want to eat something, and stop opening doors so we can rest?"

Swim: Warm-up: 200m each of free, non-free (2x50 back/50 breast), pull
4x500m, 1' as:
1) 400m free, weakside breathe, 100m back
2) 400m pull, 100m back
3) 400m free descending 100s, 100m back
4) 500m free (25 quick/75 ez)
2x200m, 30" as 50m ez free/50 ez back/50 ez breast/50 hard free
Total: 3000m