How balanced proportions affect squat mechanics. See modeled bar travel, joint stress, and work per rep compared to average.
The Numbers
ROM DifferenceNearly identical range of motion
Work Per RepVirtually the same work per rep
Displacement0mm difference in bar travel at the same weight
Energy CostNegligible calorie difference
Key TakeawayThese two builds perform nearly identically on this lift
Why This Happens
Body proportions change how you move through a lift — affecting how far the bar travels, the angles at each joint, and how much stress those joints handle. Even small differences in limb lengths produce measurable changes in effort per rep.
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
52.3 cm
52.3 cm
+0.0%
▶
Your femurs are 0.0% 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 0.0 cm longer than average, adding approximately 0 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 0.0% 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 0.0 cm longer than average, adding approximately 0 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
54.5 cm
54.5 cm
+0.0%
▶
Your torso is 0.0% longer than average. A longer torso shifts your center of mass, affecting balance and muscular demands during squats and deadlifts.
Research
Your torso is 0.0 cm longer than average. In the squat, a longer torso shifts your centre of mass forward, increasing the horizontal distance from hip to bar and raising extensor demand. Elite squat data (Ferland et al. 2020, n=59) show trunk-to-femur ratio 0.94 as optimal — a longer torso can improve bracing leverage but demands more spinal erector strength through the sticking point (102–108° knee angle).
Your torso is 0.0% longer than average. A longer torso shifts your center of mass, affecting balance and muscular demands during squats and deadlifts.
Research
Your torso is 0.0 cm longer than average. In the squat, a longer torso shifts your centre of mass forward, increasing the horizontal distance from hip to bar and raising extensor demand. Elite squat data (Ferland et al. 2020, n=59) show trunk-to-femur ratio 0.94 as optimal — a longer torso can improve bracing leverage but demands more spinal erector strength through the sticking point (102–108° knee angle).
Moment ArmHip Moment Arm
31.9 cm
31.9 cm
+0.0%
▶
Your hip moment arm is 0.0% 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 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 hip moment arm is 0.0% 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 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.
Moment ArmKnee Moment Arm
20.4 cm
20.4 cm
+0.0%
▶
Your knee moment arm is 0.0% larger than average, placing greater demand on your quadriceps to stabilize and extend the knee under load.
Research
Your knee moment arm 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 moment arm is 0.0% larger than average, placing greater demand on your quadriceps to stabilize and extend the knee under load.
Research
Your knee moment arm 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.
AngleHip Angle
52.9°
52.9°
+0.0%
▶
Your hip flexion angle is 0.0% greater than average at the bottom position. Deeper hip flexion shifts demand toward the posterior chain.
Research
Your hip 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 hip flexion angle is 0.0% greater than average at the bottom position. Deeper hip flexion shifts demand toward the posterior chain.
Research
Your hip 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.
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
37.1°
37.1°
+0.0%
▶
Your trunk leans 0.0% more forward than average. More forward lean increases lower-back and hip-extensor demands.
Research
Your trunk 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 trunk leans 0.0% more forward than average. More forward lean increases lower-back and hip-extensor demands.
Research
Your trunk 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.
OutputBar Travel (ROM)
741 mm
741 mm
+0.0%
▶
Your bar travels 0.0% 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 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 bar travels 0.0% 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 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.
OutputWork per Rep
1203.9 J
1203.9 J
+0.0%
▶
You perform 0.0% more mechanical work per rep than someone with average proportions lifting the same load.
Research
Your work per rep 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.
You perform 0.0% more mechanical work per rep than someone with average proportions lifting the same load.
Research
Your work per rep 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.
OutputDemand Factor
1.90
1.90
+0.0%
▶
Your biomechanical demand factor is 0.0% higher than average, indicating that your proportions make this lift harder relative to your bodyweight.
Research
Your demand factor 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 biomechanical demand factor is 0.0% higher than average, indicating that your proportions make this lift harder relative to your bodyweight.
Research
Your demand factor 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.
OutputCalories per 10 Reps
20.8 kcal
20.8 kcal
+0.0%
▶
You burn approximately 0.0% more calories per 10-rep set than an average-proportioned lifter at the same load.
Research
Your calories per set 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.
You burn approximately 0.0% more calories per 10-rep set than an average-proportioned lifter at the same load.
Research
Your calories per set 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.
SegmentFemur Length
52.3 cm
52.3 cm
+0.0%
▶
Your femurs are 0.0% 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 0.0 cm longer than average, adding approximately 0 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 0.0% 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 0.0 cm longer than average, adding approximately 0 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
54.5 cm
54.5 cm
+0.0%
▶
Your torso is 0.0% longer than average. A longer torso shifts your center of mass, affecting balance and muscular demands during squats and deadlifts.
Research
Your torso is 0.0 cm longer than average. In the squat, a longer torso shifts your centre of mass forward, increasing the horizontal distance from hip to bar and raising extensor demand. Elite squat data (Ferland et al. 2020, n=59) show trunk-to-femur ratio 0.94 as optimal — a longer torso can improve bracing leverage but demands more spinal erector strength through the sticking point (102–108° knee angle).
Your torso is 0.0% longer than average. A longer torso shifts your center of mass, affecting balance and muscular demands during squats and deadlifts.
Research
Your torso is 0.0 cm longer than average. In the squat, a longer torso shifts your centre of mass forward, increasing the horizontal distance from hip to bar and raising extensor demand. Elite squat data (Ferland et al. 2020, n=59) show trunk-to-femur ratio 0.94 as optimal — a longer torso can improve bracing leverage but demands more spinal erector strength through the sticking point (102–108° knee angle).
Moment ArmHip Moment Arm
31.9 cm
31.9 cm
+0.0%
▶
Your hip moment arm is 0.0% 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 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 hip moment arm is 0.0% 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 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.
Moment ArmKnee Moment Arm
20.4 cm
20.4 cm
+0.0%
▶
Your knee moment arm is 0.0% larger than average, placing greater demand on your quadriceps to stabilize and extend the knee under load.
Research
Your knee moment arm 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 moment arm is 0.0% larger than average, placing greater demand on your quadriceps to stabilize and extend the knee under load.
Research
Your knee moment arm 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.
AngleHip Angle
52.9°
52.9°
+0.0%
▶
Your hip flexion angle is 0.0% greater than average at the bottom position. Deeper hip flexion shifts demand toward the posterior chain.
Research
Your hip 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 hip flexion angle is 0.0% greater than average at the bottom position. Deeper hip flexion shifts demand toward the posterior chain.
Research
Your hip 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.
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
37.1°
37.1°
+0.0%
▶
Your trunk leans 0.0% more forward than average. More forward lean increases lower-back and hip-extensor demands.
Research
Your trunk 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 trunk leans 0.0% more forward than average. More forward lean increases lower-back and hip-extensor demands.
Research
Your trunk 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.
OutputBar Travel (ROM)
741 mm
741 mm
+0.0%
▶
Your bar travels 0.0% 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 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 bar travels 0.0% 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 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.
OutputWork per Rep
1203.9 J
1203.9 J
+0.0%
▶
You perform 0.0% more mechanical work per rep than someone with average proportions lifting the same load.
Research
Your work per rep 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.
You perform 0.0% more mechanical work per rep than someone with average proportions lifting the same load.
Research
Your work per rep 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.
OutputDemand Factor
1.90
1.90
+0.0%
▶
Your biomechanical demand factor is 0.0% higher than average, indicating that your proportions make this lift harder relative to your bodyweight.
Research
Your demand factor 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 biomechanical demand factor is 0.0% higher than average, indicating that your proportions make this lift harder relative to your bodyweight.
Research
Your demand factor 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.
OutputCalories per 10 Reps
20.8 kcal
20.8 kcal
+0.0%
▶
You burn approximately 0.0% more calories per 10-rep set than an average-proportioned lifter at the same load.
Research
Your calories per set 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.
You burn approximately 0.0% more calories per 10-rep set than an average-proportioned lifter at the same load.
Research
Your calories per set 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.
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
With average femur length, your sticking point occurs at the standard position (~106° knee flexion) where the hip moment arm peaks. Both quadriceps and posterior chain contribute roughly equally.
Angle Range103-109° knee flexion
Limiting Muscles
gluteus maximusquadricepsadductor magnus
Hip moment arm (~35%) and SSC dissipation (~22%) are the primary contributors. With balanced proportions, technique quality is your main variable — all variants are viable, and the sticking point responds well to general strength development.
Pause Squats
PRIMARY
Why: With balanced proportions, technique is your main variable. Pause squats build positional awareness and concentric strength at the sticking point, which responds well to direct training.
Why: Develops quad strength and upright torso stability. With average proportions, rotating between front and back squat variants builds well-rounded strength.
3-4 × 3-5 reps @ 75-85%.Targets: Full ROM, quad-dominant
Belt Squats
SECONDARY
Why: Extra squat volume without spinal loading. Allows you to push hip extension volume beyond what your erectors can support in barbell squats.
3 × 10-15 reps.Targets: Full ROM hip extension
Bulgarian Split Squats
UNILATERAL
Why: Addresses bilateral deficit and develops single-leg stability that carries over to squat balance and knee tracking.
3 × 8-10 per leg.Targets: Deep single-leg squat
Leg Extensions
ISOLATION
Why: Isolates quadriceps in the shortened range where they contribute most to lockout strength. Useful for developing the final 30 degrees of knee extension.
Even with favorable proportions, tight hip flexors limit hip extension at the top and create anterior pelvic tilt at the bottom. Maintaining hip flexor length supports your naturally upright position.
Test: Can you achieve full hip extension in a half-kneeling position without lumbar hyperextension?
Thoracic Extension over Foam Roller
2 × 10 reps. Arms overhead.
Upper back mobility supports the front-rack position and high-bar stability. With your upright torso position, maintaining thoracic extension maximizes your mechanical advantage.
Test: Can you extend your upper back enough to touch the floor with your hands while lying over a foam roller?
Goblet Squat Holds
2 × 30-45s with light kettlebell.
Develops end-range comfort and proprioception at full depth.
Test: Can you hold a full-depth goblet squat for 45 seconds with a flat back?
Recommended Variant
Either High Bar or Low Bar + Normal Stance
With balanced proportions, both high-bar and low-bar variants are biomechanically viable. Experiment with both and choose based on comfort and competition goals. Rotate variants periodically for well-rounded development.
01
Rotate squat variants every 3-4 week block
With balanced proportions, you benefit from varied stimulus. Cycling between high-bar, low-bar, and front squat prevents accommodation and develops comprehensive leg strength.
02
Technique refinement is your highest-ROI investment
Your proportions don't create a dominant weakness — technical consistency (bracing, bar path, tempo) is the primary differentiator for your build.
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.
With average femur length, your sticking point occurs at the standard position (~106° knee flexion) where the hip moment arm peaks. Both quadriceps and posterior chain contribute roughly equally.
Angle Range103-109° knee flexion
Limiting Muscles
gluteus maximusquadricepsadductor magnus
Hip moment arm (~35%) and SSC dissipation (~22%) are the primary contributors. With balanced proportions, technique quality is your main variable — all variants are viable, and the sticking point responds well to general strength development.
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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