tough

Hello, my fellow bread bakers,

I have a question. Why is my sourdough bread always so DENSE? From what I can tell, my sourdough starter is highly active, because I feed it 2 to 3 times a day and it bubbles right up each time. I also measure my ingredients by weight in order to make sure the percentages are accurate. No matter what I do, the bread always turns out DENSE and HEAVY. The flavour is always subtle and complex, but the texture is just too thick and chewy.