'Back' in Motion

1 minute rest between sets

1 x 300 on 5:00 rev IM DKS REC

2 x 5 x 100 on 1:30 progressive free to back EN1

6x {1 x 125 on 1:45 back EN3
{1 x 100 on 1:45 back EN1

20 x 50 on :50 DK/FK w/fins EN2
(16 x 50 on 1:00 w/o fins)

3,650 yards