Whilst training for a work sponsored marathon a couple of years ago, they arranged for us to go for a fitness test, including a lactate threshold test.
I plan some of my training based on heart rate zones, and use the zones based on the lactate threshold test I had done.
question is:
i am quite a bit fitter nowadays, than when I had the test done. Are the heart rate zones still valid??? Or do I need to be retested??
if I remember, it was quite expensive.....