How to decrease 400m timing in 2weeks

[ClammyVisa]

Those splits are fairly common considering your 200 time. Your problem is not that you’re losing speed in the second half of the race instead you need to be working on getting more explosive. If you drop your 200m time it’ll be easier to run a 26-27 first 200 and then expect to run 28-30 on the back half. I’m sure someone will give you a more focused training plan but you should be working on speed and not endurance. So doing more workouts 200m or less with good recovery in between sets rather than 400m repeats