force. and you want to know who’s the boss when it comes to creating rigid spine positions? yes, you got it, it’s the core.
in order for you to make your core stronger, you only need to let it do its job of protecting the spine when you put heavy loads in your hands or on your shoulders. now you’re probably thinking “but that basically means that every exercise is a core exercise!” and you’re right. if you managed to complete an exercise with good form, that means you managed to train the core to do its job. consistently increase the load of an exercises using good form, and you will 