Hi, I have using this app for 3 months now and progressed onto week 2 approx 2 months ago.
I use a treadmill at the gym (5.6mph) and generally go 3 times a week and I still have problems finishing the last run of the the week 2 cycle.
This is due to being generally out of breath or one of my calf's (or maybe achillies running into my lower calf) feeling like its cramping.
The first 2 90 second runs in the cycle are ok, but I get seriously out of breath after those.
I've just turned 50 and would have hoped that my aerobic fitness would have improved more than it has for me to complete the week 2 run.
Any help or suggestions greatly appreciate