Subject: Kettlebell swing to boost muscle, strength, and power

Building muscle is always at the top when considering the reasons for exercising. Young or old, if you have a body, you need to build and maintain muscle for overall and metabolic health. Simply put, you need to build muscle and strength.

Heavy kettlebell swings: a screenshot from the
Kettlebell Simple & Sinister online course

Now, a caveat if you please. Building muscle does not mean becoming a bodybuilder. What it does mean is fighting sarcopenia or the loss of muscle mass as we age, and this starts way earlier than you might suspect. According to the Cleveland Clinic, muscle mass and strength loss begins in the ‘30s and ‘40s, intensifying into the ‘60s and beyond. You could be losing 8% of your muscle mass each decade. Do not fear muscle. Fear not having or building it.


How can the swing boost the opportunity for muscle?


A study by Raymond et al., published in the Journal of Strength and Conditioning in April 2021, provides some insight. The study compared the hormonal response of a kettlebell swing protocol with two different loads but with workload equated and found a significant response in both heart rate and hormonal response (testosterone and cortisol) with the heavier load (16kg).


From the study:

In summary, the key outcomes of this study were that a 16-kg KB swing protocol elicited a greater acute hormonal response in testosterone, cortisol, and HR compared with an 8-kg swing protocol with an equal workload. Due to the effect that these hormonal measures have on strength development and hypertrophy, the findings suggest that swinging a heavier KB may better contribute to improvements in strength and muscle mass compared with a lighter KB, even when the same total work is completed.


In regard to the aforementioned hormonal response, the results of this study show an increase in hormones associated with muscle adaptation; thus (the) KB swing exercise may provide a good protocol to be included within resistance training programs.

The study used a 12-minute protocol of 30 seconds of swings followed by 30 seconds of rest. At the loads lifted (8 and 16kg), this protocol would fit at the lower end of a light glycolytic repeat session. The results with the heavier weight indicate that heavier swings are more effective at stimulating the desired response.

 

It would be interesting to see this research using heavier loads such as the 24 and 32kg kettlebells and beyond to investigate how more substantial loading would impact the response and utilize a more anti-glycolytic approach—for example, evaluating 10 swings every 1.5 minutes or 30 seconds of swings every four minutes from the last newsletter using the aforementioned loads of 24 and 32kg.

 

If you are wondering if there are any other benefits, A study from the UK published in the Journal of Strength and Conditioning in 2012, titled Kettlebell swing training improves maximal and explosive strength, by Lake and Lauder showed that the same protocol of 12-min of every thirty seconds swings with thirty seconds rest twice a week was effective for maximal and explosive strength. The study compared jump squat training with kettlebell swing training and found that both strategies resulted in a 9.8% maximum strength improvement and a 19.8% explosive strength improvement.

 

No wonder swings deliver such amazing “what the heck” effects!

 

Again, it would be interesting to see this research using heavier loads such as the 24 and 32kg kettlebells and beyond to investigate how more substantial loading would impact the response and utilize a more anti-glycolytic approach.

 

What does this mean to you?

 

This means that your Simple & Sinister practice can create the opportunity to boost the hormonal response associated with muscle building and improve maximal and explosive strength. The message is also to work on your heavier kettlebell swings. A common motivational meme comes to mind that if it doesn’t challenge you, it won’t change you.

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References


Raymond, L. M., Renshaw, D., & Duncan, M. J. “Acute Hormonal Response to Kettlebell Swing Exercise Differs Depending on Load, Even When Total Work Is Normalized.” *Journal of Strength and Conditioning Research* 35, no. 4 (2018): 997-1005.

 

Lake J. P., Lauder M. A. “Kettlebell Swing Training Improves Maximal and Explosive Strength”. *Journal of Strength and Conditioning Research* 26, no. 8 (August 2012): 2228-2233.