Maya Karcher

1 · Executive Summary

Maya has now tested on VALD 6 times over 21 months (Aug '24 → May '26). The 16 May 2026 session is her best result on every headline metric, including the most comprehensive battery she's done (CMJ, ABCMJ, SJ, SLJ, SLHAR — 5 jump types in one session).

What the 21-month story shows:

• CMJ jump height: 13.2 → 17.6 cm (+33%) — steady gain across nearly every session. Up 1.3 cm in just the last 3 months.
• Power /BM: 26.2 → 33.3 W/kg (+27%) — biggest jump in the most recent session (+11% in 3 months).
• RSI-Modified more than doubled (0.16 → 0.33) — reactive strength is the standout improvement.
• Bilateral landing asymmetry dropped from 53.7% to 14.1% — the most dramatic transformation in the data set. Maya started with severe leg-leg imbalance and has now closed the gap to within striking distance of the <10% safe zone.
• Contraction time has tightened (1.07 → 0.68 s) — she is generating more output with faster ground contact.
• Bodyweight stable around 73 kg — actually lost 1.1 kg in last 3 months while gaining 1.3 cm in jump height. Quality body composition shift.

What still needs work:

• Single-leg jump is the unresolved gap — SLJ height ~9–10 cm, no clear upward trend over 15 months. Bilateral CMJ is up 33% but unilateral is essentially flat. Classic compensation pattern — bilateral output is using a dominant side.
• Takeoff force asymmetry plateau at 16.3% — better than the 22.6% baseline but still above the 10% target. Hasn't budged much in the last year.

Bottom line: 21 months of training has produced an excellent positive trajectory on every bilateral metric and a transformative improvement in landing symmetry. The single-leg / asymmetry gap is the next ceiling to break through. A focused unilateral block over the next 8 weeks should close the bilateral-vs-unilateral split that's now the only thing holding back her overall power profile.

2 · Session Timeline

Δ values on each card are vs the immediately prior session.

3 · CMJ Bilateral Trends

One line per metric, one dot per session, oldest on the left. Net % is from baseline to current.

CMJ — Bilateral Jump

Counter-movement jump headline metrics across all sessions. Higher is better for jump, power, and RSI; contraction time and asymmetry are the metrics where lower is better.

4 · Bilateral Asymmetry

Bilateral Asymmetry

% asymmetry between left and right legs. The shaded green band is the <10% safe zone.

5 · Single-Leg Trends

Single-Leg Power

Best-trial single-leg jump metrics. Compares against bilateral progression to identify side-asymmetry trends.

5b · 16 May 2026 — Expanded Battery (Snapshot)

Three tests added to this session for the first time. No comparison points; useful as a current jump profile.

Read: The SSC contribution (CMJ − SJ = 1.5 cm) is modest — there's still room to develop the stretch-shortening cycle further. Arm-swing contribution is also small, suggesting upper-body coordination during jumps is an under-utilized resource.

6 · Programming Priorities

7 · Retest Schedule

8 · Reference Notes

All values pulled directly from the VALD ForceDecks API on 22 May 2026. Best-trial values shown unless noted. Asymmetry values reported as magnitude (worst-case across trials). RSI-Modified scaled to 0–1 range. Reference ranges drawn from age- and sex-matched normative data plus Catalyst's athlete pool. Sessions where a metric was not captured are excluded from that metric's chart.