Every 6 to 8 weeks for the main battery, and not a day sooner. That interval is not arbitrary and it is not us being precious about the stopwatch. It is roughly how long a training block takes to produce a change big enough to separate from the noise in the measurement, and if you test more often than that you are mostly measuring how the athlete slept, what they ate, and whether the turf was wet.
Parents ask us this in the third or fourth week, usually some version of is it working yet. Fair question. Here is how we answer it honestly.
Why testing every session makes the numbers worse
A 40 time has error in it. So does a vertical, a broad jump, a 10 yard split. Not error in the sense that the equipment is broken, error in the sense that the same athlete on the same day can produce a spread of results depending on warm-up, hydration, how much school stress they walked in with, and where in the week the test falls.
On a 10 yard acceleration that spread is commonly a few hundredths. On a vertical it can be an inch or two. So if a kid improves by two hundredths over 10 days, you cannot tell whether that is training or Tuesday.
Test weekly and you get a sawtooth. The athlete sees a number go backwards, decides they are regressing, and starts pressing. We have watched a kid run worse for three weeks straight because he was chasing a number instead of running the program. Testing is supposed to inform the plan. Test often enough and it starts replacing it.
There is a physical cost too. A real max-effort test battery is a hard training session. Run one every week and you have spent a quality day on measurement instead of adaptation.
What actually gets re-tested, and what does not
Keep the battery short and keep it identical. Identical matters more than comprehensive.
The main battery we come back to is the 10 yard split, the 40, a vertical, a broad jump, and a change of direction drill. That is enough to see acceleration, top end, lower body power and the ability to redirect, and it fits in one session without turning into a combine.
Run it in the same order every time, with the same rest between efforts, on the same surface. Time of day helps if you can manage it, and the point in the training week matters more than people expect, because a Thursday test after two hard days is a different test from a Monday one. If the conditions move, the number moves, and you will not know which caused it.
Strength numbers are different. Those we track continuously from the training log, because the work itself is the measurement. You do not need a testing day to know whether the trap bar went up.
How much change is actually progress
This is the part nobody tells parents, so here it is in plain numbers.
On a 10 yard split, somewhere around 3 to 5 hundredths is where we start believing it. A 40 needs a tenth to count. The vertical needs 2 inches. Under that, we note it and we wait, because it sits inside the range the test can produce on its own.
That sounds conservative and it is meant to. The alternative is celebrating noise, which feels good in October and does not survive contact with a season.
Across a 6 to 8 week block with a high school athlete who is training consistently and sleeping, a tenth off the 40 and a couple of inches on the vertical is a strong block. A younger athlete, or one brand new to lifting, will often move faster than that early and then slow down, which is normal and is not a sign something stopped working.
When a number goes backwards
It happens, and it is usually one of four things before it is ever a training problem.
Sleep is the first thing we ask about, every time, and it is the input nobody else can supply. A short week shows up in a sprint before it shows up anywhere else. We wrote the whole case for it in how much sleep a high school athlete actually needs.
Second is accumulated fatigue, which is not the same as being tired on the day. If the test lands at the end of a hard block, slower is the expected result and not a bad one. That is why every program is half recovery is the piece we hand parents most often.
Third is growth. A kid who put on 2 inches since the last test is running on levers that changed shape. Coordination catches up and it takes a few weeks.
Fourth, and least common, is that the programming is wrong for that athlete. It does happen. But it is fourth on the list, and a coach who jumps straight there is guessing.
In-season testing looks different
During a season you are not chasing peaks, you are protecting what the athlete already has.
In-season we test less, keep it lighter, and read it differently. A flat number in week 6 of a football season is a win, because the default trajectory in-season is downward as games and practices accumulate. Holding steady means the maintenance work is doing its job. We go into the in-season approach in in-season training for high school football.
Offseason is where the numbers are supposed to move, and that is where the 6 to 8 week cadence belongs.
What a retest should come with
A number on its own is not a report. When we retest, the athlete and the parent should walk out knowing what moved, what did not, which of those was expected given what the block was built to do, and what the next block changes because of it.
If nobody can tell you what the next 6 weeks does differently in light of the test, the test was theater.
The standards we measure against are in speed benchmarks for high school athletes, and if you want to see what a block is actually built out of, how to build a week that makes you faster walks through it. We train athletes from Ocean Township and the surrounding Monmouth County towns at our Ocean Township facility, and you can see the full program on our services page. If you want your athlete tested and put on a plan that uses the result, get in touch.