Marathon Plan

Pan pacs
Sat,
800m
Age group 35-39
We ran two groups together, also 30-34 (the outside 3 lanes were all doubled up, so 11 starters)
Came 4th over line, and 3rd in group
Complete lack of racing and i let it slip around 220 to go
About 3min after race, started coughing like a dog, this lasted 1\2hr or longer and non stop. Then continued all day but only every now and then.
Sun
4km cross country
No big hills, no flat areas either. Just constant up or down.
It sure took it out of me, the constant pace changing
The last 1km was pretty horrid
4th overal (every age group in bunch start) and 3rd in catagory

Mon
1500m is today.
Woke up exhausted
Calfs are sore to walk so cupping till they came good.
Still, a good warm up and should do ok??