The following videos explain basic boxing techniques and can serve as a good introduction if you haven't boxed before.
Boxing Stance:
Throwing the Jab:
Throwing the Straight/Cross:
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Using the Double-ended Bag:
These videos outline some different heavy bag and double-ended bag routines. Review these for inspiration for designing your own workout in XR Boxer.
Beginner's Heavy Bag Workout:
Intermediate Heavy Bag Workout:
Advanced Heavy Bag Workout:
Beginner's Double-Ended Bag Workout:
Advanced Double-Ended Bag Workout: