help needed with corrupted FIT file

hello fellow Garmin users,

I'm having a hard time fixing a corrupted FIT file from my last activity. 

it is my first ironman 70.3 competition and you can imagine how frustrated I am...

if someone here is willing to help - this would be highly appreciated!!

thank you

the link to the FIT file:

https://www106.zippyshare.com/v/ViB2tpm5/file.html