We've seen many thousands of players see great swing speed gains from overspeed training. In every case, the results follow a very common pattern and it is more complex than you may think.
Many players who start an overspeed regimen expect that the gains happen gradually and linearly. This just isn't the case. Players will tend to see a Jump in speed right away when starting the training. This typically occurs after the first session. This speed gain isn't permanent, but shows a great potential for what the player should see become permanent over the next 6-10 weeks of training.
These 6-10 weeks align with our "Primary Training Phase", where the training is intense and the player is normalizing this new gain. After that period of time, the player will most likely enter a plateau phase. This shows up as before session and after session speeds being almost the same.
When this occurs, we program in a corresponding period called the "Maintenance Phase" in our App. Essentially we are trying to let the player rest a bit and become comfortable with their new speeds.
After at least a month, we then ramp up and get ready to push toward another speed jump. This jump tends to happen almost out of nowhere again and then the same pattern of normalization and plateau will follow. As we have tracked players for many years at this point, we see this same pattern continue with the jumps getting smaller over time.
Depending on the player, the plateau can be extended as long as needed by continuing to perform the "Maintain Phase" once a week. This is a great protocol to follow if a player is in the middle of a busy tournament of playing schedule and they don't want to try to jump speeds.
The plateau phase is also fantastic place to get a new or updated club fitting.
If you have't yet, check out the SuperSpeed App where we have all this laid out for you in the Overspeed section of the training tab.