Jonny May believes he can still improve as a player after spending the last 10 months out with a knee injury.
The 26-year-old is back in the England fold for the November Tests after returning for Gloucester in the Challenge Cup from a knee injury he suffered last December.
Back with England, May believes he has yet to reach his full potential.
"It seems like it’s been a really long time, but then not a long time at all in some ways," he said.
"I’m excited to be back in this environment, it’s awesome and I can’t wait to get going. It’s been a long time out and a lot of hard work but I’m confident that I’ve got my best days ahead of me."
May has not appeared for England since the 13-33 loss to Australia in the disappointing home Rugby World Cup campaign last year but is back in the squad for the Old Mutual Wealth Series which begins against South Africa on November 12.
During his rehab, the Gloucester flier even attended former 400m world record holder Michael Johnson’s performance lab in Houston, Texas, in July to train alongside some of USA's best athletes.
However, he revealed some of the difficult challenges he faced on his road to recovery as he looks to come back better than ever and add to his six tries for England.
"You can’t really describe it in words, it was very, very tough. I had some dark days and some hard times," May said.
"You’ve got to start from level one all over again; learning to walk, jog, run and jump, lift, everything went back to square one. I managed to get better and I’m here now, so I want to put it behind me and move on. It’s huge for me to be back and I’m just really pleased and optimistic about my future."