Long Legs Squat Mechanics — Long Femur Challenge Guide
How long legs proportions affect squat mechanics. See modeled bar travel, joint stress, and work per rep compared to average.
The Numbers
ROM Difference4.3% more range of motion for Lifter A
Work Per Rep4.3% more mechanical work per rep for Lifter A
Displacement33mm difference in bar travel at the same weight
Energy Cost0.9 kcal difference per 10 reps
Key TakeawayLifter B does 4.3% less work per rep — Lifter A works harder for the same weight
Why This Happens
Long thigh bones force more forward lean at the bottom of the squat, increasing stress on the hips and making the bar travel farther.
What To Do About It
Low bar squat shifts the moment arm toward stronger hip extensors
Biomechanical Factor Breakdown
Factor
You
Average
Difference
SegmentFemur Length
53.9 cm
52.3 cm
+3.1%
▶
Your femurs are 3.1% longer than average. Longer femurs increase forward lean in squats and create larger hip moment arms, demanding more from your posterior chain.
Research
Your femurs are 1.6 cm longer than average, adding approximately 32 Nm of hip extensor torque demand at this load (~19.6 Nm per cm, trigonometric calculation validated by Cooke et al. 2019). Elite powerlifters cluster at a 1:1 femur-to-tibia ratio (Ferland et al., 2020) — your estimated ratio of 1.0 places you near this benchmark, which increases the demand on hip extensors out of the hole.
Your femurs are 3.1% longer than average. Longer femurs increase forward lean in squats and create larger hip moment arms, demanding more from your posterior chain.
Research
Your femurs are 1.6 cm longer than average, adding approximately 32 Nm of hip extensor torque demand at this load (~19.6 Nm per cm, trigonometric calculation validated by Cooke et al. 2019). Elite powerlifters cluster at a 1:1 femur-to-tibia ratio (Ferland et al., 2020) — your estimated ratio of 1.0 places you near this benchmark, which increases the demand on hip extensors out of the hole.
SegmentTorso Length
51.4 cm
54.5 cm
-5.8%
▶
Your torso is 5.8% shorter than average. A shorter torso can create more forward lean, increasing demands on the lower back.
Research
Your torso is 3.1 cm shorter than average. A shorter torso keeps your centre of mass closer to the hip axis, reducing horizontal moment arm and easing extensor torque demands. Ferland et al. 2020 (n=59) found a trunk-to-femur ratio of 0.94 in elite squatters — your proportions may be near or below this, favouring a more upright torso angle.
Your torso is 5.8% shorter than average. A shorter torso can create more forward lean, increasing demands on the lower back.
Research
Your torso is 3.1 cm shorter than average. A shorter torso keeps your centre of mass closer to the hip axis, reducing horizontal moment arm and easing extensor torque demands. Ferland et al. 2020 (n=59) found a trunk-to-femur ratio of 0.94 in elite squatters — your proportions may be near or below this, favouring a more upright torso angle.
Moment ArmHip Moment Arm
32.9 cm
31.9 cm
+3.1%
▶
Your hip moment arm is 3.1% larger than average. A larger moment arm magnifies the rotational force your hip extensors must produce to support the barbell.
Research
Your hip moment arm is 3.1% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
Your hip moment arm is 3.1% larger than average. A larger moment arm magnifies the rotational force your hip extensors must produce to support the barbell.
Research
Your hip moment arm is 3.1% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
Moment ArmKnee Moment Arm
21.0 cm
20.4 cm
+3.1%
▶
Your knee moment arm is 3.1% larger than average, placing greater demand on your quadriceps to stabilize and extend the knee under load.
Research
Your knee moment arm is 3.1% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
Your knee moment arm is 3.1% larger than average, placing greater demand on your quadriceps to stabilize and extend the knee under load.
Research
Your knee moment arm is 3.1% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
AngleHip Angle
49.4°
52.9°
-6.6%
▶
Your hip flexion angle is 6.6% less than average, indicating a more upright position that emphasizes the quadriceps.
Research
Your hip angle is 6.6% below the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
Your hip flexion angle is 6.6% less than average, indicating a more upright position that emphasizes the quadriceps.
Research
Your hip angle is 6.6% below the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
AngleKnee Angle
60.0°
60.0°
+0.0%
▶
Your knee flexion angle is 0.0% greater than average. Deeper knee bend increases quad and patellar tendon demands at the bottom of the lift.
Research
Your knee angle is 0.0% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
Your knee flexion angle is 0.0% greater than average. Deeper knee bend increases quad and patellar tendon demands at the bottom of the lift.
Research
Your knee angle is 0.0% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
AngleTrunk Lean
40.6°
37.1°
+9.5%
▶
Your trunk leans 9.5% more forward than average. More forward lean increases lower-back and hip-extensor demands.
Research
Your trunk angle is 9.5% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
Your trunk leans 9.5% more forward than average. More forward lean increases lower-back and hip-extensor demands.
Research
Your trunk angle is 9.5% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
OutputBar Travel (ROM)
774 mm
741 mm
+4.5%
▶
Your bar travels 4.5% further than average per rep. More range of motion means more mechanical work, which increases metabolic cost and fatigue rate.
Research
Your bar travel is 4.5% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
Your bar travels 4.5% further than average per rep. More range of motion means more mechanical work, which increases metabolic cost and fatigue rate.
Research
Your bar travel is 4.5% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
OutputWork per Rep
1258.1 J
1203.9 J
+4.5%
▶
You perform 4.5% more mechanical work per rep than someone with average proportions lifting the same load.
Research
Your work per rep is 4.5% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
You perform 4.5% more mechanical work per rep than someone with average proportions lifting the same load.
Research
Your work per rep is 4.5% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
OutputDemand Factor
2.05
1.90
+7.8%
▶
Your biomechanical demand factor is 7.8% higher than average, indicating that your proportions make this lift harder relative to your bodyweight.
Research
Your demand factor is 7.8% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
Your biomechanical demand factor is 7.8% higher than average, indicating that your proportions make this lift harder relative to your bodyweight.
Research
Your demand factor is 7.8% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
OutputCalories per 10 Reps
21.8 kcal
20.8 kcal
+4.6%
▶
You burn approximately 4.6% more calories per 10-rep set than an average-proportioned lifter at the same load.
Research
Your calories per set is 4.6% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
You burn approximately 4.6% more calories per 10-rep set than an average-proportioned lifter at the same load.
Research
Your calories per set is 4.6% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
SegmentFemur Length
53.9 cm
52.3 cm
+3.1%
▶
Your femurs are 3.1% longer than average. Longer femurs increase forward lean in squats and create larger hip moment arms, demanding more from your posterior chain.
Research
Your femurs are 1.6 cm longer than average, adding approximately 32 Nm of hip extensor torque demand at this load (~19.6 Nm per cm, trigonometric calculation validated by Cooke et al. 2019). Elite powerlifters cluster at a 1:1 femur-to-tibia ratio (Ferland et al., 2020) — your estimated ratio of 1.0 places you near this benchmark, which increases the demand on hip extensors out of the hole.
Your femurs are 3.1% longer than average. Longer femurs increase forward lean in squats and create larger hip moment arms, demanding more from your posterior chain.
Research
Your femurs are 1.6 cm longer than average, adding approximately 32 Nm of hip extensor torque demand at this load (~19.6 Nm per cm, trigonometric calculation validated by Cooke et al. 2019). Elite powerlifters cluster at a 1:1 femur-to-tibia ratio (Ferland et al., 2020) — your estimated ratio of 1.0 places you near this benchmark, which increases the demand on hip extensors out of the hole.
SegmentTorso Length
51.4 cm
54.5 cm
-5.8%
▶
Your torso is 5.8% shorter than average. A shorter torso can create more forward lean, increasing demands on the lower back.
Research
Your torso is 3.1 cm shorter than average. A shorter torso keeps your centre of mass closer to the hip axis, reducing horizontal moment arm and easing extensor torque demands. Ferland et al. 2020 (n=59) found a trunk-to-femur ratio of 0.94 in elite squatters — your proportions may be near or below this, favouring a more upright torso angle.
Your torso is 5.8% shorter than average. A shorter torso can create more forward lean, increasing demands on the lower back.
Research
Your torso is 3.1 cm shorter than average. A shorter torso keeps your centre of mass closer to the hip axis, reducing horizontal moment arm and easing extensor torque demands. Ferland et al. 2020 (n=59) found a trunk-to-femur ratio of 0.94 in elite squatters — your proportions may be near or below this, favouring a more upright torso angle.
Moment ArmHip Moment Arm
32.9 cm
31.9 cm
+3.1%
▶
Your hip moment arm is 3.1% larger than average. A larger moment arm magnifies the rotational force your hip extensors must produce to support the barbell.
Research
Your hip moment arm is 3.1% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
Your hip moment arm is 3.1% larger than average. A larger moment arm magnifies the rotational force your hip extensors must produce to support the barbell.
Research
Your hip moment arm is 3.1% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
Moment ArmKnee Moment Arm
21.0 cm
20.4 cm
+3.1%
▶
Your knee moment arm is 3.1% larger than average, placing greater demand on your quadriceps to stabilize and extend the knee under load.
Research
Your knee moment arm is 3.1% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
Your knee moment arm is 3.1% larger than average, placing greater demand on your quadriceps to stabilize and extend the knee under load.
Research
Your knee moment arm is 3.1% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
AngleHip Angle
49.4°
52.9°
-6.6%
▶
Your hip flexion angle is 6.6% less than average, indicating a more upright position that emphasizes the quadriceps.
Research
Your hip angle is 6.6% below the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
Your hip flexion angle is 6.6% less than average, indicating a more upright position that emphasizes the quadriceps.
Research
Your hip angle is 6.6% below the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
AngleKnee Angle
60.0°
60.0°
+0.0%
▶
Your knee flexion angle is 0.0% greater than average. Deeper knee bend increases quad and patellar tendon demands at the bottom of the lift.
Research
Your knee angle is 0.0% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
Your knee flexion angle is 0.0% greater than average. Deeper knee bend increases quad and patellar tendon demands at the bottom of the lift.
Research
Your knee angle is 0.0% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
AngleTrunk Lean
40.6°
37.1°
+9.5%
▶
Your trunk leans 9.5% more forward than average. More forward lean increases lower-back and hip-extensor demands.
Research
Your trunk angle is 9.5% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
Your trunk leans 9.5% more forward than average. More forward lean increases lower-back and hip-extensor demands.
Research
Your trunk angle is 9.5% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
OutputBar Travel (ROM)
774 mm
741 mm
+4.5%
▶
Your bar travels 4.5% further than average per rep. More range of motion means more mechanical work, which increases metabolic cost and fatigue rate.
Research
Your bar travel is 4.5% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
Your bar travels 4.5% further than average per rep. More range of motion means more mechanical work, which increases metabolic cost and fatigue rate.
Research
Your bar travel is 4.5% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
OutputWork per Rep
1258.1 J
1203.9 J
+4.5%
▶
You perform 4.5% more mechanical work per rep than someone with average proportions lifting the same load.
Research
Your work per rep is 4.5% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
You perform 4.5% more mechanical work per rep than someone with average proportions lifting the same load.
Research
Your work per rep is 4.5% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
OutputDemand Factor
2.05
1.90
+7.8%
▶
Your biomechanical demand factor is 7.8% higher than average, indicating that your proportions make this lift harder relative to your bodyweight.
Research
Your demand factor is 7.8% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
Your biomechanical demand factor is 7.8% higher than average, indicating that your proportions make this lift harder relative to your bodyweight.
Research
Your demand factor is 7.8% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
OutputCalories per 10 Reps
21.8 kcal
20.8 kcal
+4.6%
▶
You burn approximately 4.6% more calories per 10-rep set than an average-proportioned lifter at the same load.
Research
Your calories per set is 4.6% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
You burn approximately 4.6% more calories per 10-rep set than an average-proportioned lifter at the same load.
Research
Your calories per set is 4.6% above the population average for this squat measurement. Biomechanical research consistently shows that segment length ratios — not absolute size — are the dominant predictors of lift-specific demand (Ferland et al. 2020, de Leva 1996). This factor influences moment arms throughout the range of motion.
Compared against a lifter with the same height and weight, average proportions. Tap any row to see the research behind each factor.
Proportion-Specific Training
Your long femurs push the sticking point approximately 8 degrees below parallel, where the hip moment arm reaches its maximum. The glute max is at a poor length-tension position at 99 degrees of hip flexion, compounding the mechanical difficulty.
Angle Range103-109° knee flexion / 96-102° hip flexion
Limiting Muscles
gluteus maximusadductor magnusvastus medialis
Hip moment arm is the dominant factor (~38-42% contribution). Your above-average femur length amplifies the horizontal distance from hip joint to barbell at the bottom, creating a larger external torque demand on your posterior chain. SSC dissipation contributes ~22% as elastic energy from the descent is spent.
Pin Squats at Sticking Point Height
PRIMARY
Why: Set pins at your sticking point (~106° knee flexion). Starting from a dead stop at this exact angle trains concentric force production where your hip moment arm peaks — the most specific overload for long-femured squatters.
3-4 × 2-3 reps @ 80-85%. Full pause on pins between reps.Targets: 101-111° knee flexion
Pause Squats at Parallel
PRIMARY
Why: A 2-3 second pause at parallel eliminates the SSC, forcing your glutes and adductors to generate force from a dead stop — exactly the demand at your sticking point.
3-4 × 3-5 reps @ 70-80%. 2-3 second pause at parallel.Targets: 90-100° knee flexion
Belt Squats
SECONDARY
Why: Unloads the spine while training the hip extension pattern. Long femurs create greater spinal compression due to increased forward lean — belt squats let you accumulate squat volume without taxing your erectors.
3 × 8-12 reps. Focus on full depth and controlled eccentric.Targets: Full ROM hip extension
Bulgarian Split Squats (front foot elevated)
UNILATERAL
Why: Front-foot elevation deepens the hip flexion angle per leg, training the exact stretch position where your long femurs create the greatest moment arm. Addresses bilateral deficit and single-leg stability.
3 × 8-10 per leg. 4-6 inch elevation. Controlled tempo.Targets: Deep hip flexion (100-120°)
Hip Thrusts (deep range emphasis)
ISOLATION
Why: Targets gluteus maximus through its full range with peak resistance at hip extension — directly builds the muscle group most taxed by your long-femur sticking point.
3 × 8-12 reps. Pause 1s at top. Full depth on descent.Targets: 0-90° hip flexion
Wall-Facing Ankle Dorsiflexion
3 × 30s per side. Knee tracks over 4th toe.
Long femurs require more forward knee travel over the foot. Improving dorsiflexion directly reduces the compensatory forward lean that amplifies your hip moment arm.
Test: Can you touch your knee to the wall with your foot 12cm away?
90/90 Hip Switches
2 × 10 per side. Smooth transitions, no hands.
Develops hip internal and external rotation range, allowing your femurs to track properly in the squat without impingement at depth.
Test: Can you sit in 90/90 with both knees touching the floor?
Goblet Squat Holds (30-60s)
2-3 holds × 30-60s with light kettlebell.
Loaded stretch at full depth trains the connective tissue and proprioception specific to your deep squat position. The counterbalance reduces the forward lean your femurs create.
Test: Can you hold a full-depth goblet squat for 60 seconds without discomfort?
Heel Elevation Test
Test with 10mm, 20mm, and 30mm elevations.
Place 5lb plates under your heels and squat. If depth and comfort improve dramatically, heel-elevated shoes will significantly benefit your mechanics.
Test: Does a 20mm heel wedge improve your depth by more than 5cm?
Recommended Variant
Low Bar + Normal-to-Wide Stance
Low bar position shifts the load center closer to the hip, reducing the moment arm your long femurs create. A normal-to-wide stance allows the femurs to track outward, reducing the effective vertical femur projection and improving hip clearance at depth.
01
Your ROM is ~3% longer than average — consider 4x5 instead of 5x5 for main sets
Longer ROM means more mechanical work per rep and faster fatigue accumulation. Reducing total rep volume while maintaining intensity ensures quality reps through your extended range of motion.
02
Use slow eccentrics (3-4s) for at least one squat session per week
Slow eccentrics through your extended ROM build strength and control through the sticking region. The longer time-under-tension trains the specific positions where your long femurs create the most difficulty.
03
Use accommodating resistance (bands/chains) for 2-3 week blocks
Bands and chains flatten the V_min by matching the human strength curve — resistance is lowest at the sticking point and highest at lockout, training you to accelerate through the weak zone.
04
Include isometric holds at the sticking point angle for 3-5s per rep
Isometric strength adaptations transfer within 20-50 degrees of the trained angle, directly reinforcing the V_min position.
Your long femurs push the sticking point approximately 8 degrees below parallel, where the hip moment arm reaches its maximum. The glute max is at a poor length-tension position at 99 degrees of hip flexion, compounding the mechanical difficulty.
Angle Range103-109° knee flexion / 96-102° hip flexion
Limiting Muscles
gluteus maximusadductor magnusvastus medialis
Hip moment arm is the dominant factor (~38-42% contribution). Your above-average femur length amplifies the horizontal distance from hip joint to barbell at the bottom, creating a larger external torque demand on your posterior chain. SSC dissipation contributes ~22% as elastic energy from the descent is spent.
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What This Comparison Shows
STATURE Mechanics estimates biomechanical demand for each lift from modeled body segment lengths. This comparison shows the difference in range of motion, moment arms, work per rep, and difficulty between two body types using the same solver assumptions for each athlete.
How It Works
1. Body segments (femur, torso, arms) are calculated from height using anthropometric research data
2. A kinematic solver finds the joint positions at each phase of the lift
3. Moment arms and displacement are computed from the kinematic solution
4. Total mechanical work (joules) = force × displacement × reps
5. Demand factor normalizes by bodyweight to show pure biomechanical difficulty
Try this comparison with your own measurements
The comparison tool pre-fills with representative values. Enter your actual measurements for a personalized analysis.
STATURE