I'm a 400m runner (55.60 second PB,) moving up to the 800m, but I cant run a decent 800m for the life of me. My PB is only 2:14.80, but I've done sessions which should point to a much quicker personal best.
Some sessions: 6x200m in 25 - 28 with 2 minutes recovery
12x200m in 29 - 32 with 90 second recovery.
10 x 300m between 50 and 53.
4x300m, 3 minutes recovery between 42 and 44.
What would be the reason that I am so slow at 800m and why I cant run a decent one?