Averaged 154 strides per minute on my long run: is my cadence too slow?

Worrying about cadence is a waste of time.

I have a "low" cadence too at about 160, just under probably. I don't know about you, but I find that my cadence picks up to between 165- 180 when I run faster, especially when I really get going on the track. Try running something much faster and see what happens. I wouldn't worry about it though, so long as you are running with good form don't panic about spm.

I agree with the other sentiments. I generally am about 150-160 on easy runs. If I do a tempo run it noticeably picks up to about 175-180.

-hobby jogger