iPhone Fitness Electronics

Learn about speed and distance monitors, GPS fitness trainers and heart rate monitors so you can choose the right one for you.

Learn how to choose and use a heart rate monitor to track HR target zones for training, weight-loss and overall cardiovascular fitness.

Does a high VO2 max mean you’re in shape? We explain what VO2 max indicates and how to improve your VO2 max score through aerobic exercise. 

A fitness watch is a valuable tool for trail running. Learn some features that can help you become a better runner and have more fun on the trail.

Learn how to train using a heart rate monitor, what your HR max is and how to determine it, and how to calculate and use heart rate training zones.

Learn what VO2 max is, how you can measure it and why it’s key to improving fitness. Also get tips on training routines that can help you improve it.