i am all done with MIS for a while. i am the runner who logs 50-60 miles per week. i was doing MIS two days a week. now i want to switch off to pure strength for a month. how many times a week do i need to do each tape? i usually do an 8-10 mile run in the a.m. and then lift weights at night. i never do speed work and weight train on the same day. thanks for all of your help. keep up the good work everyone. you are all very inspiring to me.