Girth (Circumference) Measurements

Girth (circumference) measurements track body shape and regional change using a flexible, non-stretch tape. They don't give %body fat by themselves but are excellent for monitoring change during fat loss or muscle gain — often revealing recomposition the scale hides (body-recomposition).

Common sites: neck, shoulders/chest, waist, hips, thigh (mid/upper), calf, upper arm (relaxed and flexed), forearm. Technique: tape horizontal, snug to the skin without compressing, same landmark each time, end of normal expiration; take 2 measurements per site (agree within ~0.5 cm) and average.

Uses: simple progress tracking; the waist (waist-circumference) and WHR (waist-to-hip-ratio) doubling as health-risk markers; some equations estimate body fat from girths (e.g., the US Navy method using neck/waist/hip + height), though these are rougher than skinfolds.

Key practice: consistency dominates. The same tape, sites, landmarks, tension, time of day, and tester make small real changes detectable above noise.

• Tape circumferences at standardized sites (neck, chest, waist, hips, thigh, calf, arm, forearm).
• Tape horizontal, snug not compressing, same landmark; 2 reps/site averaged.
• Track shape change (great when scale weight is flat); waist/WHR also flag health risk.
• US Navy girth equation estimates %fat roughly (less accurate than skinfolds).
• Consistency (tape/sites/tension/time/tester) is everything.

• waist-circumference / waist-to-hip-ratio — specific health-risk girths.
• body-composition-overview — where girths fit among methods.
• girth-measurements — logging girths over time.
• body-recomposition — why girths catch change the scale misses.