The UK Chief Medical Officers’ guidelines describe cardiovascular activity, sometimes called aerobic activity, as activity that increases breathing rate and makes the heart and muscles work harder. In the first two small studies below, the kettlebell sessions produced measurable cardiorespiratory responses in their participants; the third reported a rise in VO2max after four weeks of training. Whether kettlebell work counts as “cardio” in the sense of the weekly guidelines is a different question, and three small studies of healthy adults give part of the answer.
Three studies side by side
| Study | Participants | Session | What was reported |
|---|---|---|---|
| Two-hand kettlebell exercise versus treadmill walking, Journal of Strength and Conditioning Research (JSCR), 2014 | 10 novice volunteers (5 men, 5 women) | 30 minutes: three continuous 10-minute sets of 10 swings followed by 10 sumo deadlifts, with 3-minute rests | Oxygen uptake, respiratory exchange ratio, energy expenditure per minute and blood pressure were similar to moderate-intensity treadmill walking; rating of perceived exertion (RPE) and heart rate were greater during the kettlebell session |
| Kettlebell high-intensity interval training versus sprint interval cycling, JSCR, 2015 | 8 men | 12 minutes: three circuits of four exercises in a Tabata regimen | Oxygen uptake was higher, and total energy expenditure significantly higher, during the kettlebell session than the cycling session |
| Kettlebell training and aerobic capacity, JSCR, 2015 | 17 female college soccer players (9 kettlebell, 8 circuit-training comparison) | 20 minutes of kettlebell snatches, 15 seconds of work and 15 seconds of rest, 3 days a week for 4 weeks | Maximal oxygen consumption (VO2max) rose by an average of 2.3 ml/kg/min, about 6%, in the kettlebell group; no significant change in the comparison group |
What each study can and cannot show
The treadmill comparison. The authors set the treadmill speed and grade to match the oxygen uptake of the kettlebell session, so the similar figures were partly built in. The informative part is that heart rate and perceived effort were higher for the kettlebell work at that same oxygen cost. Ten novices completed one session each, so this describes a single 30-minute routine, not training over weeks.
The interval comparison. Eight men did two 12-minute sessions in counterbalanced order. The authors concluded that the kettlebell intervals may be more attractive and sustainable than sprint cycling and can stimulate cardiorespiratory and metabolic responses that could improve health and aerobic performance. That is a statement about responses during a session in a very small group, not about long-term fitness.
The training study. This is the only one of the three that measured a change in fitness. The participants were assigned to groups rather than described as randomly allocated, they were collegiate soccer players, and the four weeks of snatches were added to their off-season strength and conditioning programme. Whether the same result would follow in people who are new to exercise is not shown by this paper.
Where this fits in the UK guidelines
The NHS says adults should aim for at least 150 minutes of moderate-intensity activity or 75 minutes of vigorous-intensity activity a week. It gives a simple check: if you can still talk but not sing, the intensity is moderate. The UK Chief Medical Officers describe the same talk test, with vigorous activity marked by difficulty talking without pausing.
The NHS lists lifting heavy weights and circuit training among examples of very vigorous activity, described as short bursts of maximum effort broken up with rest. It also notes that muscle-strengthening exercises are not always an aerobic activity, so they need to be done as well as the 150 minutes of aerobic activity. The studies above did not test whether any kettlebell routine meets that weekly target, and none was designed to replace walking, cycling or running.
Questions readers ask
Can a swing session be counted as moderate or vigorous?
The talk test is the check the NHS and the Chief Medical Officers describe. The studies report oxygen uptake and heart rate for particular routines in small groups, so they cannot say how any other session would feel. Technique for the movement is covered in how to do a kettlebell swing safely.
Is a heavier bell better for this?
None of the three studies compared bell weights, so they offer no answer. Choosing a starting load is covered in what weight kettlebell to use.
Who should check first?
The NHS advises speaking to a GP first for anyone who has not exercised for some time or who has medical conditions or concerns. A first routine might follow the beginner kettlebell workout.
The bottom line
The first two studies measured cardiorespiratory responses to particular kettlebell sessions in small groups. A separate four-week study found a rise in VO2max of about 6% in the kettlebell group of collegiate soccer players, alongside their off-season programme. They show what those exact routines did in those exact groups. UK guidance asks adults for strengthening activity on at least two days and for 150 minutes of moderate activity or 75 minutes of vigorous activity each week, and the NHS lists lifting weights among muscle-strengthening activities.
Sources
- Comparison of two-hand kettlebell exercise and graded treadmill walking: effectiveness as a stimulus for cardiorespiratory fitness, Journal of Strength and Conditioning Research, 2014 (pubmed.ncbi.nlm.nih.gov)
- Comparison of cardiorespiratory and metabolic responses in kettlebell high-intensity interval training versus sprint interval cycling, Journal of Strength and Conditioning Research, 2015 (pubmed.ncbi.nlm.nih.gov)
- Effects of kettlebell training on aerobic capacity, Journal of Strength and Conditioning Research, 2015 (pubmed.ncbi.nlm.nih.gov)
- Physical activity guidelines for adults aged 19 to 64, NHS, page last reviewed 22 May 2024 (nhs.uk)
- UK Chief Medical Officers’ physical activity guidelines, Department of Health and Social Care, read 25 October 2026 (gov.uk)



