Workload tests is the main way for analysing your progress.

Tests in rest as additional tool in training.

Or, what the reason of using running in cyclists training?

Or why so important to know your intensity zones.

Testing without principles become senseless.

About limitations which caused by high sensitivity threshold to acidosis.

Minimal price for necessary functions for maximal performance!

What actually it can do, and what it can't?

Mobile compromise for ergometric tests, and indirect calorimetry.

The easiest test for determination AT and AeT is also easiest test for monitoring your training progress.