What did the early Christian twice weekly fasts consist of?

Other than what is mentioned in the [Didache](https://en.wikipedia.org/wiki/Didache) regarding the days for fasting, what did early Christian "twice weekly fasts" consist of? What I'd like to know more about is what they fasted from. For example: 1. Was it a total fast? 2. Water only? 3. Fasting from wine and food? I would be grateful for any references that could be provided on this.