Does thanking God for an accomplishment take credit away from yourself?

I have a friend who just completed a marathon. A legit marathon with a pretty a good time. Unfortunately, she was sick in the days leading up to the marathon but competed anyways. After she finished, she thanked God for being with her every step and helping her recover enough to run.

Don’t you think she should be giving HERSELF a little more credit for this? SHE ran, SHE toughed it out even with an illness.

For the record, I have no problem with her feeling safe that God is watching over her, but this is HER accomplishment. She did it and no one else. Right?