40 min 10km. Am I on the right track?

[Tigerdale]

Pretty Happy with the 5k paced run today. I tried to keep it at around current 10k pace. Felt really good and relaxed for the first 2km. Then the pace became slightly uncomfortable, but I still felt like I could have kept going without great discomfort.

Distance (km)__Time____Km split____HR
1____________4:09_____4:09______163
2____________8:21_____4:12______170
3____________12:37____4:16______170
4____________16:52____4:15______173
5____________21:09____4:17______172

400's will be on wednesday. Do you think a sub-42 minute 10k is realistic for the race day?

-Dale