Doing more does not always mean getting faster. This is something that some athletes have a hard time understanding.
Speed is a product of how fast your brain can relay a message to your central nervous system to fire your muscles. The more involuntary this reaction, so the less you have to think about it, the speedier your reaction time.
You may increase the speed of the message by repetition. But this is only half the equation! Your muscles, the ‘things’ that actually have to do the work, have to be ready to take the signal and turn the engines on.
Volume overloads the muscles and taxes energy systems within the body. Without knowing what energy system needs to be taxed, you could be hindering your chance to increase your speed.
Testing can show you what ‘speed’ is. This could be volume or velocity (or both).
Using a blood sample from the finger, the body will show you how hard it’s working. This means that testing shows you exactly where you need to work. Sometimes this means more volume. Volume can be precribed as more lower intensity work to allow you to recover faster between efforts. Or volume could mean more speed work as you have built the foundation to handle the work load.
So instead of just logging hours, why not train with purpose?