I have to confess that, for the first time since beginning the program, I did not do all three days last week. My shoulders were really sore from the 160 pups called for on Day3 of the prior week, and bothered me all week. I did days 1&2 of Week 5 Column 1, but found I couldn't even use a floor pump to top off my tires without pain, so decided to take a few days off. I'll repeat Week 5 Column 1 this week.