Walking beat will be an excellent way for practicing breath techniques, the one mentioned is great, but the one I practice most are the basic breath ladders, which come in 4 ways.
Firstly you must keep good posture as walk, try to remain as relaxed as you can, breath in through nose out through mouth, and walking at your normal pace breath in for one step, breath out for 1 step, then breath in for 2 steps out for 2, up to 15 steps to start with, try not to breath in until your lungs are so full it causes you to gag, or panic, and try to be as smooth as possible, try to control the amount of breath released or taken in so the breath last for all the steps, once at 15, go back down to 1.
Then once you have the hang of it, try a triangle breath pattern, same as before, but a in breath for 1 step, hold your breath for 1 step, then exhale for 1 step, again up to 15 to start with then down to 1, again try to keep the breath smooth and each phase last for all the steps.
3rd is the square breath, breath in for 1 step, hold for 1 step, exhale for 1 step, and an empty lung hold for 1 step, this is the harder one, again up to 15, and back to 1. This one is harder when you exchange the steps, for a press up, sit up etc, so 1 situp on an in breath, 1 on a full hold, 1 on an exhale, 1 on an empty hold, then 2, up to 5 reps, so a whole cycle would be 60 sit ups, once you have mastered it. Then after 5 mins recovering by stretching and rolling, move to press ups, leg raises, squats, and pull ups, just to be clear 5 situp's whilst breathing in once, 5 on a hold etc.
The 4th is slightly different, I call sausage breath, I use it when I walk my dogs, breath in for 4 steps, hold for 4 steps, exhale for 8 steps, excellent for clearing out carbon dioxide, great for an early morning walk.
For recovering yourself, especially when you first try the square breath pattern, is burst breathing, when under stress or to regain your breath after excersion, in through the nose, out through the mouth, try to match your heart beat for approx 8 seconds, then take a deep in breath, and then exhale, burst breath again for 8 seconds, deep in take exhale, after 3 cycles you will find you are pretty much restored.