Swimming · Sweden · 2008–present
Sarah Sjöström
Sprint freestyle & butterfly — world record holder
The fastest female swimmer in history over 50 meters, built on an unusually broad-shouldered sprint frame.
The blind analysis put "Track running (1500 m–5000 m)" first. Sarah Sjöström became a legend in swimming anyway — bodies are a starting point, not a destiny.
BODY MEASUREMENTS
| Measurement | Value | Source |
|---|---|---|
| Height | 182 cm | Olympics.com athlete bio |
| Weight | 70 kg | Olympics.com athlete bio |
| Wingspan | 182 cm | Est.1 |
| Leg Length, Inseam | 83 cm | Est.2 |
| Torso Length | 64 cm | Est.3 |
| Shoulder Width | 47 cm | Est.4 |
| Hip Width | 42 cm | Est.5 |
| Hand Size | 19 cm | Est.6 |
| Foot Size | 27.7 cm | Est.7 |
- 1.00×height (female population ratio; no published arm span)
- 0.466×height (swimmer −2%)
- height − legLength − 0.19×height (head/neck)
- 0.245×height (swimmer +5%)
- 0.233×height
- 0.104×height (published NBA/NFL 'hand size' is span, not length, so the ratio is used)
- 0.152×height (no reliably published shoe size)
WHAT THE AI SAW
Build type
RUNNER'S BUILD
- •Lean BMI with low non-functional mass—endurance favorable
- •Slightly long legs relative to height (≈45.6%)—efficient stride mechanics
- •Neutral ape index (reach not unusually long)
- •Streamlined upper body (shoulder-to-hip ratio ≈1.12)
THE AI'S SPORT RANKINGS
Track running (1500 m–5000 m)
Height and slightly long legs yield efficient stride length; lean mass promotes superior running economy and heat dissipation. Body type closely mirrors many world-class milers/5k athletes who succeed with tall-lean frames and limited upper-body bulk.
3000 m Steeplechase
The combination of 182 cm height and ~46% leg ratio assists barrier and water-jump clearance while maintaining distance-running economy. Lean build reduces fatigue accumulation over 7.5 laps with obstacles.
Road cycling (climbing/all-round GC type)
Low BMI and streamlined upper body benefit power-to-weight on climbs and aerodynamic drag. Slightly taller stature helps leverage on the bike. Could excel as a climber/all-rounder with training, though the very lightest climbers at this height are often a few kilograms lighter.
Triathlon (Olympic/70.3)
Endurance-lean frame is ideal for the run leg and efficient for cycling. Neutral wingspan is not a pure swimming advantage but is adequate, especially with wetsuit-assisted races and strong run capacity to compensate.
Race Walking (20 km)
Longer legs, moderate height, and lean mass favor high cadence with controlled pelvic rotation and low vertical oscillation over long distances. Anthropometry suits sustained technical endurance.
BIOMECHANICAL READ
- 1Endurance-optimized frame: low BMI and moderate height reduce energy cost per km in running and support high aerobic workloads.
- 2Leg-dominant proportions: slightly longer legs improve stride length at a given cadence and aid 3,000 m steeple barrier clearance.
- 3Neutral reach and average hand size: neither helps nor hurts most target endurance sports; minimizes unnecessary upper-body mass.
- 4Moderate shoulder width and narrow hips: streamlined frontal area aids running and cycling economy; less beneficial for collision/power sports.
- 5Foot size slightly above average: small benefit to swimming propulsion and ground contact leverage without excessive rotational inertia.
LESS ADVANTAGEOUS IN
- •Basketball and volleyball (height/reach below typical elite norms)
- •Pure power/sprint events like 100 m, track cycling sprint, bobsleigh push (insufficient power-oriented mass)
- •Heavy strength sports (powerlifting, Olympic weightlifting heavyweight, throwing events)
- •Combat sports requiring leverage/mass (wrestling/judo upper weights); neutral reach not advantageous for striking divisions
- •Rowing heavyweight and sprint swimming (benefit from longer wingspan and greater upper-body mass)
- •Bouldering/elite sport climbing (typical advantage is high ape index and very low mass)
METHODOLOGY
The AI analysis above was generated from the nine measurements listed — nothing else. The model never saw Sarah Sjöström's name, photo, or sport; it received the same anonymous input as any visitor who uses the tool. The verdict compares its blind rankings with reality.
Measurements marked Est. are not publicly documented and were estimated from published data using the noted anthropometric ratios.
This page is editorial commentary. My Best Sport is not affiliated with or endorsed by Sarah Sjöström.
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