From this article, the reader will be introduced to this specially themed issue of ACSM's Health & Fitness Journal®, Field Assessments on the Go. The reader also will be made aware of the terms and definitions used throughout this themed issue.

In the pages that follow, this specially themed issue of ACSM's Health & Fitness Journal® will provide evidence-based and practical recommendations on incorporating client-specific field-based assessments of physical fitness and functional performance in the exercise program development process from experts in pediatric, adult, geriatric, perinatal, occupational, postrehabilitation health, and fitness.