19.96 kg
Granite stone mass per WCF spec
165–180
Sweeping HR bpm at peak end load
8–10
Ends per match (Olympic / WCF)
±0.5°
Release-angle tolerance for line
Biomechanical Analysis
What your body
needs to excel.
Athlete Profile assesses the specific biomechanical traits that predict elite performance in Curling. These aren't generic fitness metrics - they're sport-specific physiological signatures.
Hack Delivery & Single-Leg Balance Chain
1.5–3 m slide on one trail leg
The delivery loads the rear quadriceps and gluteus medius isometrically while the slider-foot ankle holds neutral inversion-eversion across 3–4 seconds of single-leg gliding. Centre-of-pressure excursion is the primary determinant of stone-line accuracy - elite deliverers hold mediolateral CoP sway under 8 mm where club-level athletes drift 18–25 mm. Vestibular-proprioceptive coupling at the trail-leg ankle, combined with a stable lumbopelvic brace, governs whether the hand releases on the broom-aim line or breaks across it. Our BAL assessment isolates this single-leg postural reserve in millimetres of CoP path length.
Sweeping Repeat-Bout Capacity
8 stones × 2 sweeps × 5–10s max efforts
Each end demands 16 sweeping bouts of 5–10 seconds at near-maximal upper-body output, with the brush head loaded at 25–35 kg of downward force at 4–5 Hz stroke frequency. Triceps brachii, anterior deltoid, latissimus dorsi, and lumbar erectors operate in a hybrid isometric-dynamic mode while heart rate drifts to 165–180 bpm and lactate accumulates to 5–8 mmol/L late in the end. Power output collapse across stones 6–8 of an end - not stone 1 - is associated in observed cohorts with lost weight calls. Our CMJ and lateral protocols capture the upper-body repeat-bout economy that separates anchor sweepers from short-burst specialists.
Rotational Release Precision
±0.5° wrist tolerance at 1–2 m/s
Stone rotation - 2 to 3 turns delivered through forearm pronation and a clean handle release - is the input that decides curl arc on a swept path. Wrist-flexor and pronator-teres timing windows of 30–50 ms govern whether the rotation enters cleanly or wobbles, and a wobble of 5–10° at the hog line translates to 0.6–1.2 m of positional miss in the house. Our coordination-throw and balance assessments expose distal kinetic-chain timing under proprioceptive load, replicating the exact precision demand of hack release.
Lumbar-Pelvic Tolerance Under Sweeping Flexion
Repeated 30–50° trunk flexion at speed
Sweepers operate in 30–50° of sustained trunk flexion while travelling 28 m per stone alongside a moving granite, generating cyclic compressive loads through the L4-L5 and L5-S1 facet joints. Lumbar erector co-contraction must hold neutral lordosis through fatigue, or facet-joint loading shifts and produces the lumbar facet syndrome that ends careers. CMJ-derived posterior-chain symmetry and balance scores reveal the lumbopelvic stiffness required to sweep the late ends without compensatory hip-hike or shoulder hike patterns.
What Athlete Profile Measures
Your Curling
assessment report.
Slider-Foot CoP and Line Accuracy
Mediolateral centre-of-pressure displacement at the slider foot during the 3–4s hack hold correlates more strongly with delivery accuracy than any single strength metric. National-team deliverers hold MED-LAT CoP under 8 mm; recreational athletes drift 18–25 mm and show systematic broom-line break across 28 m of travel. Single-leg balance training with eyes-closed perturbation reduces this drift inside 6–8 weeks.
Sweeping HR and the Late-End Wall
Heart rate climbs to 165–180 bpm during sweeping, with the sweeper's blood lactate often exceeding 6 mmol/L by stone 5 of an end. VO2 peak above 50 mL/kg/min for men and 44 mL/kg/min for women preserves brush downforce into the seventh and eighth stones - below threshold, downforce drops 15–25% on the final two stones, and weight-control errors cluster there.
Skip Pattern Recognition Under Pressure
The skip's role is dominated by visual-spatial pattern recognition: ice-reading, weight estimation, and line calling on a 4.75 m wide sheet across 8–10 ends. Eye-tracking work with elite skips shows fixation patterns concentrated on biting-edge stone positions and broom-target alignment, with decision latency under 4 seconds for routine calls - a skillIQ-equivalent demand far above the physical metrics of the position.
Anthropometric Range and Delivery Extension
Curling tolerates a broad anthropometric range, 168–195 cm, with no clear height advantage across positions. Taller deliverers gain modest reach into the slide and a longer release arc, but compact athletes excel through lower-CoG stability on the hack. Lower-limb length symmetry and trail-leg quadriceps endurance matter far more than absolute height.
Sample Curling Fit Report
What you'll receive after your assessment
Sport Fit Score
19.96 kg
Percentile-ranked against age + sex-matched athletes
Biomechanical Grade
A–F
Per-trait scoring across all 5 assessment dimensions
Loading Patterns Observed
5 described
Sport-specific loading patterns from published cohort literature with corrective movement suggestions
Common loading patterns observed in Curling
Drawn from published cohort literature for elite competitors in this sport. Descriptive only - not predictive, not diagnostic, and not specific to any individual athlete. Consult a qualified healthcare professional for any medical concern.