The ‘shield’ is your abdominals, the awareness that you have of them, the tension that you hold them under as you go about your daily business, be it sitting, walking or running, even lifting heavy weights. ‘Breathing behind them’ is you, taking your in and out breath, protected by this tensed and prepared ‘core’.
This core to your being is one of the most important areas to get in touch with if you are going to get the most benefit out of bodyweight resistance training and kettlebells. Core muscle groups are a related area, but will will be talking about them at a later stage.
Lets start with a simple exercise. Stand up straight, and gradually tighten your abdominal muscles, and no, dont suck them in, just brace them naturally and gradually increase the tension until your body feels naturally ‘locked’. Now, breathe behind that, taking in your breath, and then letting it go out, feeling that tense protection of your muscles.
I suggest you start with a few minutes a day to start with, and then gradually extend your awareness to whatever you are doing while you are moving about in your daily life. I am not there yet, so dont feel alone. But this awareness, this relationship with your body’s muscular form, will do you in great stead getting to know how your body works, and what you can do with it as you train.
Start simply, act decisively to achieve your goals- and enjoy!