(Rating changes in comparison to 2020) Fitness trends based on results of an annual survey conducted by ACSM’s Health & Fitness Journal® (Worldwide Survey of Fitness Trends for 2021 By Walter R. Thompson, Ph.D., FACSM, (ACSM'S Health & Fitness Journal: January/February 2021 - Volume 25 - Issue 1 - p 10–19) ) New 1. Online training → ↓1    2. Wearable technology ↑4    3. Body weight training ↑9    4. Outdoor activities ↓3    5. High intensity ...