Thomas admitted he over exerted himself in last year's training camp, which led to him tearing his right ACL for the third time in his career.
"I've controlled myself a little bit more," Thomas said, via ESPN New York. "Last year, I was killing myself. It worked out, when I went back I was in great shape, when I came back I was in great shape. This year, it's just being a little more cautious."
Thomas said "the knee is feeling great" and he hopes to start doing individual work on the field. His career has been derailed by his multiple ACL surgeries, and he hasn't played in a regular season game since 2010. The Giants brought him back on a one-year deal worth $700,000.