Are Kettlebells Or Dumbbells Superior For Gym Based Strength Gains?

By Russ Howe


If you were to put kettlebells vs dumbbells into a fight to see which training method returned the best overall strength gains, who do you think would come out on top? This is a popular gym argument which has raged for many years, and today we will use the latest science to teach you the answer.

Before we do that, it is important to point out that using both approaches is always going to be far superior to limiting yourself to just one style. You will often hear people swearing by the use of just one protocol, all this does is limit your ability on the gym floor as each style comes with it's own plus points and negatives, therefore a combination of the two styles alongside other forms of training, such as yoga, interval training and body weight movements, would be optimal for achieving the goals set by most individuals.

However, recent scientific research looked into the kettlebell training style in direct comparison to free weight training in a bid to put an end to the arguments among fitness enthusiasts.

In the study, researchers ordered their first group of subjects to perform a six week course of swings, goblet squats and accelerated swings using a 35 pound weight. Improvements of squat ability, vertical leap and power clean strength were documented.

Their second group of subjects were put through a 6 week course of squats, high pulls and power cleans using free weights in a bid to boost strength on squat, power clean and vertical leap. They used a weight which was equal to 80% of their one repetition max.

At the end of the six week study, the results of the two groups were compiled and compared. The overwhelming winner was the second group - the free weight group. These individuals boasted improvements of a 15% higher squat compared to group A's 5% increase. They also noticed a 10% power clean and 4% vertical leap boost.

Their kettlebell counterparts, on the other hand, could only manage a 4% increase to their power clean and added just 1% to their vertical leap. Those results were quite surprising, given the explosive nature of kettlebell training in general.

If you want to base your training program purely on the scientific findings, then free weights clearly return the greatest strength gains.

Of course, it would be very silly to take this study on face value and insist that you are only going to train with barbells and dumbbells from now on. Just because they were shown to be superior across the board for strength gains does not mean that any other form of training is useless. For example, body weight jump squats have been shown to recruit 40% more muscle fibers than barbell squats, does this mean you should never squat with a barbell again? No, of course not.

While free weights have now been shown to trump other equipment in the strength category, that doesn't mean they are the only method you should use. For instance, there are a number of exercises which can be performed using a kettlebell which are simply more functional than using conventional dumbbells and barbells. The swing is a perfect example of that.

The battle between kettlebells vs dumbbells will be one that undoubtedly cuts most gyms down the middle depending upon personal choice. However, the latest scientific research clearly documents one winner.




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