The long run is part of Sunday mornings. The 70 to 90 minutes give you the time to build up your endurancer but also clear your mind. In high school and college I wrote most of my papers on runs. In times of anxiety, I would keep the mind open and it helped me clear up many issues.
Enjoy the long run.
Sunday, July 28, 2019: 70-75 minute long run
Week 2, Summer mileage, Training week 4, time to get focused
Monday: 55 minute park run
Tuesday: 20 minute warm up run, 4 times hilly mile, 5 minute jog between each, 20 minute cooldown
Wednesday: 55 minute run, relaxed
Thursday: 60 minute fartlek, 20 times 1 minute hard, one minute easy, 10 minutes easy before and after, keep it good effort
Friday: 55 minute park run, relaxed
Saturday: 50 minute easy run
Sunday: 70-75 minute long run