The German international featured for 45 minutes against Leicester last week and admitted after doubling his workload that he ran out of steam slightly in the final 20 minutes at Stevenage.
"I would say for 70 minutes it was okay," reasoned Christian. "I felt quite alright and afterwards I had a few problems - in the last 15 minutes I played with cramps in the calf.
"I feel alright now, I wanted to finish the 90 minutes even if it hurt. The last 15 minutes I played a bit less than before. I am very happy about playing 90 minutes though.
"It was quite good. I had a few runs down the left side and felt I could do something - it was alright."
Christian also reported that he was never really a contender for a place against Arsenal at the weekend despite impressing in his first comeback match.
"No, not really. Last Monday I played just 45 minutes which, from my point of view, was better as I had been out for seven weeks. It was not worth risking in the first game and here I had problems in the last bit with my fitness level.
"So it was good to play the 90 minutes and the game against Arsenal would have been too early. In such a game you can't play at 60 or 70 per cent."
Christian Ziege took a major step towards a first team return after completing 90 minutes for the reserves against Charlton on Monday evening.