Interval Training 400m x 6

After the long 60km during the weekend, I just want to do something short. Decided to have 400mx6, 1.5 mins rest, 4:30 target time.



However, the body is not fully recovered. Other than the first split, I am not able to hold on the 4:30 pace. Drifting to 4:45 to 5:00.