The kettlebell is one of the most efficient training tools ever invented. A single kettlebell swing works your hamstrings, glutes, lower back, core, and shoulders in a ballistic hip hinge pattern that's impossible to replicate with any machine.
What Makes a Good Kettlebell?
Cast Iron vs Competition Steel: Cast iron kettlebells are the classic. The size varies with weight. Competition kettlebells are all the same size regardless of weight — a big advantage for technique consistency as you progress through weights.
Handle Diameter: Thicker handles build forearm strength but fatigue you faster. Most general-purpose kettlebells have handles around 33–35mm diameter, which works for most people.
Handle Finish: Smooth chrome handles are great for swings but rough on palms during snatches. Powder-coated handles are the preference for serious kettlebell athletes.
Flat Base: A flat base means the kettlebell sits stable on the floor — essential for renegade rows and bottoms-up presses.
Which Weight to Start With
- Women beginners: 8–12 kg (18–26 lbs)
- Men beginners: 16–20 kg (35–44 lbs)
- Experienced women: 16–24 kg (35–53 lbs)
- Experienced men: 24–32 kg (53–70 lbs)
For CrossFit specifically, RX weight for kettlebell swings is 24 kg (53 lbs) for men, 16 kg (35 lbs) for women.
Our Top Picks
Best Value: Amazon Basics Cast Iron
A no-frills single-piece cast iron kettlebell available from 10 to 60 lbs. The powder coat is smooth, the base is flat, the handle is good. Under $30 for a 20 kg bell is exceptional value.
Best Competition Bell: Kettlebell Kings
For competition-style training and hardstyle practitioners, Kettlebell Kings' competition bells have a consistent handle diameter across all weights and a finish that's gentle on hands during high-rep snatches.
The Essential Exercises
Master four movements and you'll have all the conditioning you need: the swing, the Turkish get-up, the goblet squat, and the clean and press. These four alone are a complete strength and conditioning program.