Cara
| Test | Before | After | Change |
|---|---|---|---|
| Countermovement jump | 11.63″ | 15.88″ | +36.6% |
| Single-leg jump, left | 5.50″ | 9.50″ | +72.7% |
| Single-leg jump, right | 6.75″ | 9.00″ | +33.3% |
Progress is a number, not a feeling
We measure every athlete at the start, train what the numbers say, and measure again. Here is what that looks like when we show our working.
The pattern worth noticing
Most training is sold on the vertical jump. It is the easiest number to quote and the least useful one on its own.
Look at the single-leg columns instead. In every athlete below, the weaker leg improved more than the two-footed jump did — and in three of the four, the gap between left and right narrowed.
The framework: the gap matters more than the number.
A swing built on a lopsided athlete leaks force and loads one side of a growing back. Closing the
side-to-side difference is what makes the quickness safe to repeat.
The numbers
Kendall
| Test | Before | After | Change |
|---|---|---|---|
| Countermovement jump | 17.00″ | 20.63″ | +21.3% |
| Single-leg jump, left | 7.38″ | 10.88″ | +47.5% |
| Single-leg jump, right | 9.25″ | 12.50″ | +35.1% |
Rafael
| Test | Before | After | Change |
|---|---|---|---|
| Countermovement jump | 15.50″ | 19.75″ | +27.4% |
| Single-leg jump, left | 8.75″ | 11.75″ | +34.3% |
| Single-leg jump, right | 6.75″ | 10.38″ | +53.7% |
Lilly
| Test | Before | After | Change |
|---|---|---|---|
| Countermovement jump | 12.88″ | 15.75″ | +22.3% |
| Single-leg jump, left | 7.00″ | 10.00″ | +42.9% |
| Single-leg jump, right | 6.25″ | 9.13″ | +46.0% |
Countermovement jump is a two-footed jump from standing. Single-leg jump is the same test on one leg at a time, which is where side-to-side differences show up. These are individual athletes, measured on the same protocol before and after. Results vary with age, stage, starting point and how much training actually happens.
The work behind the single-leg numbers
The column that moved most is the one-legged jump. This is the kind of work that moves it.
What earned progress looks like
What we did not do
We did not cherry-pick the best month or change the test between measurements. Same protocol, same equipment, before and after.
And we are not claiming these outcomes are typical. They are four athletes who trained consistently. What we will claim is that we measured them, and that we would rather show you numbers than adjectives.
What families and coaches say
- 150+ athletes earned college scholarships
- 100+ went on to Division I programs
- 14 High School All-Americans
- 13 National Team members
I’ve been playing professional soccer for 5 years, but after 1 month training with Aaron, I am bigger, faster, and stronger than I have ever been. It’s not just lifting weights for the sake of it, it’s practical and sport-specific. It’s perfect for me during the off-season so I can get back to the top of my game.
I knew I needed to get stronger and more athletic to reach my goal of becoming a Division I discus thrower. Learning the foundations and technique of lifting, breathing, balance and stretching benefited me far into my career — those skills set a strong base as I looked to get more powerful in the weight room and in the ring. They helped me in college because I knew how to functionally move my body.
I came out more athletic and able to move more freely while pushing weight — more explosive and quick twitch. Very positive, but informative as well: he helps you understand the why of what you are doing and the benefits of it.
See where your athlete actually stands
Every athlete here started with an assessment. That is the same place your athlete would start.
Request an assessmentQuestions parents ask
Are these results typical?
No — they are individual athletes, and we would be misleading you to present four people as an average. Starting point matters enormously: an athlete who has never trained has more room to move than one who has trained for years. What is consistent is the approach, not the percentage.
Why show single-leg numbers at all?
Because golf loads one side relentlessly — the lead leg posts up on every swing, hundreds of times a week. A large side-to-side difference is a known risk factor, and a two-footed test hides it completely. A large side-to-side difference is a known risk factor, and a two-footed test hides it completely. The single-leg test is where it shows.
How often do you re-measure?
Enough to see whether the plan is working and to change it if it is not. Re-testing is part of the programme, not an upsell — a plan that never gets checked is a guess with a schedule.
What if my athlete does not improve like this?
Then we say so, and we look at why. The most common reasons are not mysterious: not enough training actually happening, load elsewhere in the schedule, or a starting point that was already strong. You get the honest read either way.