Practicing interview answers silently isn’t enough

Something I noticed while preparing for interviews earlier. I used to read system design blogs and review concepts. But interviews aren’t silent. They’re verbal performance under pressure. When someone interrupts you and asks “why?”, your structure can collapse quickly. What helped me a lot was actually practicing explaining answers out loud instead of just reading material. Simulating interview conversations made a big difference. Curious how others here practice the speaking part of interviews. Do you do mock interviews with friends or mostly prepare alone?