I want to find out what my lactate threshold heart rate is. I've got a heart rate monitor, however, it doesn't have a lap button. This means it'll be difficult to do a 30 minute time trial test outdoors. Any ideas on how to do this without a lap button?
I was thinking: perform the test indoors, and after 10 minutes, put on the chest strap. However, I've heard doing this test indoors is much more difficult and not a very good gauge of LTHR.