Kettlebell physical training practiced as the world's best system of kb training is taught, Hard Style, is efficient as it engages the posterior chain, mostly overlooked by conventional weight machines training whichvworks mostly anterior (front) chain. Engages every muscle at the same time as opposed to isolating. The more muscles working the more efficient. Kettlebell training takes care of cardio conditioning, strength, flexibility and stamina at the same time. Kettlebell training empowers you to move better in your daily life activities as it is a total funtional system of moving. No activity in our daily life asks us to isolate our muscles. We move as one unit. Kettlebell training assists us in mving fluidly, gracefully, powerfully, and beautifully at the same time!