Endr2
WU: 400 as 100 free, 100 back. 300 as 50 drill, 50 swim. 200 as 100 kick, 100 swim. 100 free building effort. MS: Endurance swim: 2 x 1000 free (1:30 recovery). Check heart rates, should be zones 3-4. Keep effort and pace steady and consistent. CD: 3 x 100 as 50 non-free, 50 free (20").