Learning Effects in Air Displacement Plethysmography.

Air displacement plethysmography (ADP) is a widespread technique for assessing global obesity in both health and disease. The reliability of ADP has been demonstrated by studies focused on duplicate trials. The present study was purported to evaluate learning effects on the reliability of body composition assessment using the BOD POD system, the sole commercially available ADP instrument.

Reliability of body composition assessment using A-mode ultrasound in a heterogeneous sample.

Background/objectives: Several studies have addressed the validity of ultrasound (US) for body composition assessment, but few have evaluated its reliability. This study aimed to determine the reliability of percent body fat (%BF) estimates using A-mode US in a heterogeneous sample.

Subjects/methods: A group of 144 healthy adults (81 men and 63 women), 30.