Just because it is convenient or easy to measure some physical quality does mean that the measure is meaningful. If you do measure it (whatever it is) make sure it is meaningful and will yield actionable results or don’t waste the time measuring it. Gathering random numbers that look cool on graphs does not make the athlete better. Remember a simple axiom I have lived by for years: Training = Testing and Testing = Training. The ultimate test of athlete’s abilities and capacities occur in the competitive arena and everyday in training. Pay close attention to daily training sessions, built in transparent “test” workouts or sessions that give you information as to the state of the athletes progress relative to the sport and position demands. Investing time and effort in this will yield consistent reliable results that will motivate the athlete by making them better.