I would include learning to activate the stability muscles throughout all exercises performed. Many of the currently used exercises are excellent for increasing endurance (planks, bridging, etc.), especially for novice exercisers. But stability, like most activities, needs to be dynamic and adaptive.
Teaching techniques that allow clients to intentionally activate the stability system is the first step. When this is done consistently, the client will develop this into a habit and also become aware of when the system is not activated or too fatigued to safely attempt an activity.
The progression of this is to use multiplanar movement activation exercises for the stability muscles. This is fairly complex, but not difficult to learn how to do or how to teach. Understanding progression/regression is the key to this and really any type of exercise system.
I teach this and more on the Big Island of Hawaii. Check out my new website, www.hawaiifitnessacademy.com or contact me through my profile here.
Come to the Big Island for a Continuing Educaton Vacation and you should be able to write off most of your expenses (if you set up your week/weeks with me properly) for the trip.
Ask your tax guy. According to my tax advisor, “Professionals must spend over half of their days doing business (in a CEC course for some part of the day) to deduct airfare. Other costs (Hotels, meals, rental car) are only written off for the business days (days of CEC courses).”
I set up CEC courses for individuals or groups according to this, their budget, and how they want to set up their time. I can take you around the island for off site course work and out on field trips like swimming the triathlon course, hiking the volcano,and more with CEC time, etc. And you get to come to Hawaii!!
The answers are all great. Neither one is necessarily the better type of training. They are just different. Sets target the muscle group(s) in question. Circuits spread the overload more diffusely throughout the body. Both can have significant benefit. I would include both in the training program.