There is NOTHING WRONG with weight training for strength - however most of the movements are from body building, power lifting and olympic lifting. The most beneficial manner of lifting for athletes is olympic lifting - however most programs don't include this type of training AND it's an extremely dangerous manner of lifting. What most often happens, is that athletes default to body building and this so called "functional training" where they do bodybuilding exercises on an unstable surface. Power lifting exercises are great for developing strength in the 3 major lifts - bench, squat and dead lift. However they do nothing to improve your athletic ability, flexibility or cardiovascular systems.
Kettlebells address all of these concerns. They develop more what I term "useable" strength. Strength that is applicable to sports and the movements required to be successful. The hip pop & lock, the incorporation of multiple body parts working in unison - as opposed to single muscle or single body part isolation. Athletic movements require a training the body how to have strength in all positions and to cope with the instability of a resistive load that varies throughout a complete movement. No other training tool offers the answers quite like the kettlebell. The core, hips and the complete musculature are engaged with virtually every movement. The off center bell makes the body respond to an unstable load, yet with a firm base rooted in the ground.
If you want to be a bodybuilder - focus on isolated single body development. If you want to be a strong in the bench, squat and deadlift - focus on powerlifting. If you want to be an athlete - use kettlebells to increase your strength, conditioning, flexibility and athletic development.
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