Building back my base + 10k training program

[goldfeld]

I just found out there's a race on the 20th of May. I started yesterday the sub-50 program, so the race comes at a good time.
Should I also do a 4k time-trial after 3 weeks or is the race sufficient?
Should I run the race with a heart-rate monitor? (I usually avoid it for better comfort)

Thanks for the comments and talk to you soon,
Johnathan.