I meant more in the sense of "how high can you jump" rather than "how quickly can you accelerate/decelerate/change direction/react".
One of these is much more strength based than the others.
I'd actually like to disagree with this, especially in Verge's current state.
Verge doesn't have anyone offering him advice about how to most efficiently fulfill a training goal, so the efficiency of his training is limited by his own ability to formulate an effective training plan.
Anyone can figure out that lifting weights and doing sit-ups both make you stronger, and each does so in a different way. Takes some cleverness to realize that you can improve your gains by alternating between them many times, doing one while the other is on break.
Write-ins are an attempt to do that cleverness.
Granted, it could also go wrong, exhausting us so much that we get sore.