The American swing takes the kettlebell overhead. Learn the hip hinge, swing path and back protection, with prerequisites and clear milestones.
The American kettlebell swing is the variation of the kettlebell swing in which the bell swings all the way up overhead. In CrossFit it is the standard because it combines hip extension with an overhead end position. There is also the Russian swing, in which the kettlebell only goes to chest height.
The honest answer to "isn't this dangerous for the back?": it depends on technique. A lab study of 7 men, plus a kettlebell master, calculated low back compression of about 3,200 newtons in a swing with a 16 kg kettlebell – roughly the weight of 320 kg pressing on the spine for a moment – and a shear force on the lowest lumbar vertebra in the opposite direction compared to classic lifting [1]. The authors see this as a reason why many people experience the swing as back-friendly and some find it irritating. Here too: they did not measure the American swing at CrossFit tempo.
You learn the basic form in a few sessions; the American swing safely takes more like weeks (experience, not study data).
Stand shoulder-width, push the hips far back, knees stay soft. The back stays long, the chest open. You bend in the hip, not in the back, like someone pushing a door shut with their backside.
Milestone: 10 clean hinges, the back stays straight.
Grip the kettlebell with both hands and swing it between your legs. The hips extend powerfully, the bell flies to chest height. The arms are ropes. A study of 15 healthy people found similar joint angles and similar hip moments in swings to shoulder height and to overhead, but a 34 % longer cycle time in the overhead swing [2].
Milestone: 3×10 at a steady rhythm.
Let the arms go as the bell flies up: the hips send it up, not the shoulders. If you notice pulling up, go back to the Russian swing.
Milestone: 10× without arm pull.
Let the bell swing overhead from the momentum, arms vertical next to the ears. At the top you stand tall, ribs down, glutes tight. Then let the bell fall and guide it back into the hips. In a study of 15 trained men, the two-armed American swing activated the rectus abdominis more than the one-armed (by 40 to 59 %), while the one-armed swing activated the back extensor more strongly on one side (14 to 25 %) [3].
Milestone: 10× with arms at the ears and a stable trunk.
Now build sets: 20 to 30 reps. Breathe out at the top, in at the bottom, and let the hips set the beat. A small study of 12 young adults showed that beginners who learned the swing from video only found, over a week, a pattern in which the hips lead the shoulders [4].
Milestone: 3×20 without losing form.
The American swing is safety-critical because a load swings overhead and the back carries many reps. Fatigue changes the swing: in a study of 16 experienced men (ten rounds of 30 seconds of maximal swings), the swing got slower over a round, ground reaction force rose and hip power fell; the authors see the rising force as a possible injury risk [5]. So rather do more small sets than one long one.
Stand so that the bell can fly forward in an emergency, and let go if you lose control. Stop if your back pulls or the shoulder stabs. This guide explains and motivates but does not replace supervised training. Have your swing filmed from the side once.
Do the dead-stop swing: set the kettlebell down after every rep. The dead stop forces you to reload the hips every time and shows you honestly whether the swing comes from the hips or the arms. And think in an outside image: "send the bell at the wall" instead of "tighten the glutes". According to a meta-analysis, this external focus helps execution and retention [6].
In the Russian swing the kettlebell swings to chest or shoulder height, in the American swing straight overhead. The hip movement is the same. In a study of 15 healthy people the cycle time of the overhead swing was 34 % longer, the joint angles the same [2].
A light kettlebell for learning, one at which the form holds. Studies often used 12 kg for women and 20 kg for men [2]; that is a study design, not a recommendation. Start lighter if you are new.
Not generally. The load is high, but the hip hinge spreads it across hips and legs. Technique and dose are decisive [1]. With back pain, have the cause clarified before you practise swings.
Not necessarily. The one-armed swing loads the trunk differently on one side than the two-armed. The authors of one study recommend alternating both over time [3].
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