Kettlebell

A compact weight with a handle, used for strength and conditioning exercises. Its offset handle lets it swing, rotate, and be held in varied positions.

Kettlebell swing: A ballistic exercise that propels a kettlebell forward through a hip hinge and returns it between the legs. The swing uses the handle and offset mass to train a forceful hip hinge.
Center of mass: The point representing the average position of an object's mass for analyzing its motion and balance. A kettlebell’s mass sits below and beyond the hand, shaping its movement.
Russian weight measure: A traditional Russian unit of mass used in trade and associated historically with cast-iron kettlebells. The early bell’s name and weights were tied to Russian measures used for weighing goods.
Dumbbell: A short bar with a weight fixed at each end, designed to be held in one hand. Unlike the kettlebell, a dumbbell centers its load along the handle.
Turkish get-up: A floor-to-standing movement performed while holding a weight overhead. The kettlebell’s overhead hold challenges stability through several linked positions.
Moment of inertia: A measure of how strongly an object resists angular acceleration about an axis. The bell’s mass distribution affects how readily it rotates around the grip.
Vladislav Kraevsky: A Russian physician credited with introducing systematic physical training with weights in the late nineteenth century. His promotion of weight training helped establish kettlebells in Russian physical culture.
Barbell: A long bar designed to be loaded with weight plates and held with one or both hands. A barbell supports bilateral lifts and large loads that differ from most kettlebell work.
Kettlebell snatch: A ballistic lift that brings a kettlebell from between the legs to an overhead lockout in one motion. This lift demonstrates how the bell can travel around the wrist into an overhead position.
Hip hinge: A movement pattern in which the hips travel backward while the trunk inclines with a relatively stable spine. Swinging the bell depends on generating and reversing force through a hip hinge.

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