ok, let me explain. Most coaches just pick the "run at race pace" because
1) they don't really know much about running - so that is what they read online
2) they don't know enough about you to know if this workout is going to be too hard
So, the solution is always try to build into a workout - meaning you are going to get faster as it goes.
So, your first set should always be slower as you body warms up. Even the reps within a set can be done in progressive fashion.
Example:
400 - just start out easy (don't try to run all the reps at the same pace - runners who do this often start out too fast, and end up hurting the purpose of the workout = that is they get slower towards the end - this is always a sign that you went too hard and should shut it down so as not to spend too much time struggling).
400 - second go a second or two faster
400 - another second faster
400 - another second faster if you have it in you (or if the previous one felt quick, hold that pace)
When I was in HS I had a coach who must have gotten workout times from some book or formula and wanted me to do 8 x400 in 68 or something like that. I struggled from the very first one. Instead of adjusting the workout to fit me (my level of fitness) he just kept giving me the same workout. That's not really coaching. Coaching is listening and observing and making changes as needed.
As others have pointed out this is also a pretty aggressive workout forJan 1. One way to may this workout more base oriented (if your coach is reading this or you want to propose this) is to not worry about the time so much and cut the recovery down to 30-60 sec. By making the rest super short you can't run too fast or you won't be able to finish. You are not able to finish the workout your coach is giving you because the paces are too fast. Here is what I propose if you are going to do intervals in Jan.
4x400 progressive (faster as you go, but start out easy) 30 sec rest after #1, 40 after #2, 50 after #3) 2 min rest then 4x200 progressive (same formula as above). The second set should only be done if you did not go too fast on the first set. Until you learn to run the workout under control there is no point doing more. When you can do this workout properly 8x400 + 8X200 is still an awful lot. I would personally drop to to 6x400 and 4 x200 (the goal of the 200's is just to work on speed a little and should only be done slightly faster the 400 pace.
don't be discourage by the fact that you can not complete this coaches workout. It is not an indication of anything about you - it is more an indication that the workout paces are too fast. and the workout is too long. You would be better served to be doing tempo runs with maybe 1 track work a week. (again the tempos should be done under control = the goal is not to run as fast as you can or hard but try to run as quick with as little effort (efficiency) is the goal. If doing 4-6 miles you should finish feeling like you could have gone 10.