All Articles 10 articles across 5 topics. Resistance Equipment (2) How a Cable Pulley System Distributes Load How a Selectorized Weight Stack Changes Resistance Cardio Machines (2) How a Treadmill Belt and Motor Work Together What a Flywheel Does on a Stationary Bike Recovery Tools (2) How a Percussion Massage Device Generates Force What a Foam Roller's Density Changes Mechanically Fitness Wearables (2) How an Optical Heart Rate Sensor Reads a Pulse What an Accelerometer Measures in a Tracker Home Gym Setup (2) How Home Gym Flooring Absorbs Impact What a Weight Capacity Rating Accounts For