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TrackFIT 3D Intelligence™ · Predicted Mile Report
Predicted Mile Report
The stopwatch tells you what Brooke ran. TrackFIT tells you what her body is built to run — reading repeat speed, step behavior, fatigue response, impact load, usable force, and movement quality across the TrackFIT Mile Challenge. The distance between those two numbers is the story this report tells.
Athlete
Brooke Ellis
Age
17
Height / Weight
5'6" / 128
Date
06.14.2026
TrackFIT Score
62
Green Belt
Execution
64
Result
62
Pound-for-Pound
60
The Kinesiologist’s Read
What Closes The Gap
Brooke doesn’t break down from lack of effort — she breaks down because her posterior chain fatigues late. Around rep 11 her hamstrings and glutes stop holding stride length, her stride shortens, step count climbs, and usable drive leaks away. The fix is not “run more.” It’s building the specific muscles and systems that let her frame hold its stride under fatigue. The target areas are below — your coach turns them into the drills, stretches, and lifts.
The Gap
What’s Still In There
Now
5:41.0
What Brooke runs today, leakage included.
Ceiling Now
5:02.7
Best her body — as built today — supports at zero leakage.
Body Ceiling
4:16.0
Her frame’s architectural ceiling, fully developed.
Lifetime
4:36.4
Realistic mature projection. She’s 17 — the runway is enormous.
Motion DNA Gap
38.3 sec
The distance between what she runs and what her body already supports today. Closed by removing leakage — the late stride compression, timing, and sequencing. This is technique, not fitness.
Development Gap
46.8 sec
The distance between her body today and her frame’s full ceiling. Closed by building the athlete — aerobic engine, strength, stride power. At 17, she has years to close most of it.
Report Summary
Quick Read
What stands out
Brooke holds repeat speed well and shows better-than-average technique retention deep into the challenge. Her strongest quality is that her speed does not collapse when fatigue arrives — she keeps enough mechanics to stay strong right through the finish. For a 17-year-old on a mile-friendly frame, the ceiling above her is the real headline.
What needs attention
Brooke’s step length compresses too much in the back half of the challenge. That drives up step count, raises impact workload, and lowers force efficiency. She is working hard, but not converting enough of that work into maintained speed late — which is exactly where her Motion DNA gap lives.
Usable Force — The Number To Grow
Effort Output
More force is not the goal. More usable force is. Usable drive is the force that becomes forward speed — the number that moves the clock. Impact is what her body absorbs each step; it is the cost of the step, not the target. Grow usable drive and she runs faster.
Usable Drive / Step
48 lb
Force that becomes forward speed. This is the number to grow.
Drive Produced / Step
58 lb
Total drive she generates per step.
Drive Leaked / Step
10 lb
Lost to braking, bounce, and late compression.
Force Efficiency
82%
How much produced drive becomes maintained speed.
Total Usable Drive Delivered
54,000 lb
Sum of usable drive across all 1,125 steps of the challenge.
Peak Usable Drive
63 lb
Her strongest single-step propulsive output.
Impact Load — The Cost, Not The Target
Workload Carried
This is what her body absorbs to do the work — useful for training load and recovery, not a number to chase.
Impact / Step
391 lb
Average ground impact per step (3.1× bodyweight).
Peak Impact
452 lb
Highest single-step impact load.
Total Impact Workload
439,875 lb
Carried across 1,125 steps — roughly 220 tons.
Landing Absorption
79%
How well she manages ground-contact load.
Challenge Results
Event Outputs
Predicted Mile
5:41
Built from repeat speed and fatigue response.
Predicted 1500m
5:18
Track-friendly equivalent output.
Average 100m
16.9
Repeat-speed average across all 16 reps.
Fastest Rep
16.2
Opening speed at her best rep.
Slowest Rep
17.8
Late-rep performance under fatigue.
Total Run Time
4:30.4
Accumulated work across 16 reps.
Rep Consistency
88%
Repeatability across the challenge.
Breakdown Point
Rep 11
Where visible fatigue begins affecting output.
Step Profile
Stride Behavior
Total Steps
1,125
Total step count across all 16 reps.
Avg Steps / Rep
70
Overall rep step demand.
Early Rep Steps
67
Reps 1–4 average.
Late Rep Steps
73
Reps 13–16 average.
Avg Step Length
50.5 in
Across all reps.
Early Step Length
52.8 in
Stronger opening rhythm.
Late Step Length
48.7 in
Fatigue compression shows up here.
Step Length vs Height
76.5%
Relative to her 66-inch height.
Step Efficiency
Retention
Rep Phase Breakdown
4-Rep Blocks
Reps 1–4
- Avg Rep Time: 16.3
- Avg Speed: 13.7 mph
- Usable Drive: 51 lb
- Avg Step Length: 52.8 in
- Avg Step Count: 67
- Impact / Step: 405 lb
Reps 5–8
- Avg Rep Time: 16.7
- Avg Speed: 13.4 mph
- Usable Drive: 49 lb
- Avg Step Length: 51.4 in
- Avg Step Count: 69
- Impact / Step: 396 lb
Reps 9–12
- Avg Rep Time: 17.1
- Avg Speed: 13.1 mph
- Usable Drive: 46 lb
- Avg Step Length: 49.8 in
- Avg Step Count: 71
- Impact / Step: 387 lb
Reps 13–16
- Avg Rep Time: 17.5
- Avg Speed: 12.8 mph
- Usable Drive: 44 lb
- Avg Step Length: 48.7 in
- Avg Step Count: 73
- Impact / Step: 378 lb
Execution + Motion DNA™
Mechanics
Posture Control
76
Maintains usable form under moderate fatigue.
Sequencing
74
Good pattern, not fully optimized late.
Technique Retention
81
One of her stronger execution metrics.
Contact Timing
78
Mostly stable, minor late drift.
Energy Leakage
73
Wasted output during late-rep compression.
Signature Tier
Type 2-B
Repeatable speed with late stride compression.
Compensation Patterns
2
Primary issue is late-rep step shortening.
Event Fit
Strong
Her frame is naturally built for the mile.
Belt Logic
Final Belt
| Category | Score | Belt |
|---|---|---|
| Execution | 64 | Green |
| Result | 62 | Green |
| Pound-for-Pound | 60 | Green |
| TrackFIT Score | 62 | Green |
Path to Next Belt
Path to Blue
What Brooke needs next
Her current TrackFIT Score is 62, which places her in Green Belt. Blue Belt begins at 65. The clearest path is not one dramatic change — it is holding step length deeper into the challenge, recovering usable drive late, and raising pound-for-pound force conversion. Her Motion DNA gap is where the fastest seconds live.
How she moves up
Roughly +3 in Result, +2 in Execution, and +2 in Pound-for-Pound moves her into Blue range. The biggest opportunities are late-rep stride retention, lower drive leakage, and stronger usable force relative to bodyweight. She keeps producing the force — she needs to keep more of it pointed forward.
Target Avg 100m
16.5
~0.4 sec faster average rep raises Result.
Target Stride Retention
86%+
Holding early stride length late supports Execution.
Target Usable Drive
52+ lb
More usable force per step lifts Pound-for-Pound.
Target TrackFIT Score
65+
The threshold to unlock Blue Belt.
What Closes The Gap
Target Areas — Zig Ziegler, Sports Kinesiologist
These are the physical target areas Brooke’s Motion DNA and challenge data point to — where her body is leaking performance and what has to be built to stop it. This is the what and the why. Her coach designs the how — the specific drills, stretches, and lifts.
Motion DNA Gap — 38.3s (Technique & Fatigue Resistance)
The leak: stride length collapses from 52.8″ to 48.7″ after rep 11.
Target areas: hamstrings and glutes (hip extension — holding stride length late), hip flexors (leg recovery as she tires), and calves / Achilles (elastic rebound — her ground-contact time rises as these fatigue). Watch for left-right asymmetry in single-leg strength; uneven posterior chain shows up as inconsistent late-race steps.
Development Gap — 46.8s (Build The Body)
The ceiling raiser: her frame can hold far more, but not yet under load.
Target areas: the aerobic engine (the system that delays every fatigue signal above), posterior-chain strength (hamstrings, glutes, lower back — so a 5’6″ frame carries stride length deep into the race), and trunk / core stability (her 82% force efficiency and 10 lb/step leak point to force escaping laterally — a stronger trunk keeps it pointed forward).
Hold Stride Late
Hamstrings + Glutes
Posterior chain — the #1 late-race leak. Hip extension holds stride length.
Elastic Rebound
Calves + Achilles
Cuts ground-contact time. Where her step count climbs late.
Stop The Leak
Core + Trunk
Keeps force forward, not lateral. Protects late-race posture and lower back.
Delay Fatigue
Aerobic Engine
The system that pushes her breakdown point past rep 11.
What This Report Means
System Logic
Your TrackFIT Score determines your ranking. Athletes are ranked by TrackFIT Score, not by time alone.
Your lowest belt across the three categories sets your belt. Execution, Result, and Pound-for-Pound all matter.
Usable force is the number to grow. Impact is the cost of the step; usable drive is the force that becomes speed.
The gap is the story. This is not a race result. It is a map from where Brooke is today to where her body can take her — and at 17, most of that distance is still ahead of her.