Of course you can. And you don’t need to spend a penny on equipment or programs to do it. If you have any understanding of the function of the abdominals or if you have good awareness of muscle activation.
Now the average client will need to be taught how, but it is not rocket science. I do teach fitness professionals a couple of CEC courses on the activation and stabilization of the core. This is important information for those in the industry who have not been exposed to these types of training methods. www.hawaiifitnessacademy.com