TrackFIT 3D Intelligence • 10×40 Speed Endurance Report
Cindy Ainsley
17 • Soccer • 5'8" • 143 lbs
Cindy found her best rhythm on Rep 3 (5.43), then gradually lost time as fatigue rose before a major breakdown on Rep 8 (6.24). She recovered after the drop, but the report shows a clear decrease in force quality and movement efficiency as the challenge progressed.
55
MDNA
Biomechanics
56
Kinesiology
54
Challenge Result
9 / 10 Inside Standard
5.43
Rep 3 of 10
5.70
Speed endurance average
41,340 lbs
Across all 10 reps
72,552 lbs
Absorbed load profile
Executive Readout
What This Means
Cindy can access usable speed and hold it for multiple reps, but she does not yet fully own speed endurance. Her profile shows one clear fatigue collapse and a slower force pattern across the back half of the challenge.
Primary Limiter
As fatigue builds, effort force drops while impact force rises. That means she is producing less useful forward force and absorbing more non-productive load.
Coaching Direction
Her next gains come from better repeat hip extension, improved trunk stiffness, and stronger foot-ankle return so she can preserve speed deeper into the set.
Rep-by-Rep Challenge Breakdown
Rep Times + Best Window
Best time = 5.43 • Standard window = 5.93Time Lost Per Rep
Rep 3 = best rep • Rep 8 = major breakdownForce Output Profile
Effort Force vs Impact Force
Propulsive quality vs absorbed loadPer-Step Average Force
Estimated 24 steps per rep • Rep 8 uses 25Running Trajectory + Fatigue Pattern
Trajectory Path
Best rep posture vs fatigue rep postureSpeed Curve by Step
Rep 3 vs Rep 8 • estimated step-by-step profileStep Model
Best Rep Step-by-Step Model
Rep 3 • 23 steps • average speed and force progressionKinesiology Focus
Primary Weak Link
Glute Max + Hamstring Drive
Needs better repeat hip extension under fatigue to preserve stride force and reduce back-side collapse.
Heavy sled march
Single-leg RDL
Band-resisted hip lock
Stability Need
Glute Med + Adductor Control
Pelvic control drops as the set progresses, likely contributing to wasted side-to-side force and reduced line efficiency.
Lateral step-down
Copenhagen plank
Single-leg snapdown hold
Late-Set Fatigue Zone
Soleus + Foot-Ankle Stiffness
Ground stiffness likely softens late, increasing contact time and raising impact absorption instead of returning force forward.
Bent-knee calf raise
Pogo series
Split stance isometric calf hold
Transfer Layer
Trunk Stiffness + Arm Timing
Better trunk organization will help her keep force directed forward instead of leaking into posture breakdown late in the challenge.
Dead bug with band press
Wall sprint switches
Half-kneeling cable chop