Final answer:
The most recommended method to obtain accurate results for waist, hip, and thigh circumferences is to use a measuring tape.
Step-by-step explanation:
The most recommended method to obtain accurate results for waist, hip, and thigh circumferences is to use a measuring tape. To measure waist circumference, wrap the tape around the narrowest part of the waist. For hip circumference, measure around the widest part of your hips. Repeat the measurements multiple times to ensure accuracy and calculate the ratios as mentioned in the provided references.