Train, even if you don't feel like it.

Total 2000 - 1 hour

Warm up
4 x 100 as 50 swim, 50 kicks choice @ 2:00
6 x 50 free as odds 35 easy 15 fast - even 50 easy
6 x 50 swim

3 sets of
25 fast
50 easy
75 as 50 fast 25 easy
100 easy