Is shadow boxing a good workout? What the research says

Is shadow boxing a good workout? Yes, if you keep moving. Punching the air with steady footwork, round after round, can reach vigorous intensity, the level health agencies credit for activities like running and kickboxing classes. Slow shadow boxing with long pauses between combinations is closer to moderate effort, which still counts. What it does not do on its own is build much strength, because there is nothing to push against.

One limit first. We did not find a published training trial of shadow boxing as a fitness workout for healthy adults. The intensity figures below come from the Compendium of Physical Activities, a reference table of energy costs, not from a shadow boxing study.

Is shadow boxing cardio

Yes. Cardio means activity that raises your heart rate and breathing for a sustained stretch, and continuous shadow boxing does that. How hard it is depends almost entirely on your pace.

Exercise intensity is usually described in METs. The CDC explains that "one MET equals the energy or oxygen used while sitting quietly", that "physical activity that burns 3 to 5.9 METs is moderate intensity", and that "physical activity that burns 6.0 METs or more is vigorous intensity".

The Compendium of Physical Activities has no entry called shadow boxing. These are the closest ones:

A simulated round sits well inside the vigorous band, and the general punching bag entry is lower than it. Pace matters more than having something to hit. For stance, punches and beginner rounds, see our boxing workout at home with no equipment.

The CDC agrees on where boxing styles land. Its list of vigorous activities includes "exercise classes like vigorous step aerobics or kickboxing".

What makes shadow boxing effective or not

Is shadow boxing effective? The same activity can be a hard workout or a light one. The difference is mostly whether you stop.

Continuous movement. Shadow boxing gets easy when you throw a combination, stand still, think about the next one, then throw again. The rests quietly pull the average down toward the moderate end of the table. Keeping your feet moving between combinations, bouncing, stepping and slipping, is what holds the intensity up.

Rounds with a clock. Timed rounds with short rests give you a reason to keep going until the bell, not until your arms first tire.

Effort you can check. Use the talk test. By the CDC's rule of thumb, at moderate intensity you can talk but not sing, and "a person doing vigorous-intensity activity cannot say more than a few words without pausing for a breath". Fitness changes the answer: "an activity that is vigorous for a person of average fitness may only be moderate for a very fit person".

A pace you choose. There is a reason not to force maximum effort from the first round. A 2011 review in Sports Medicine by Ekkekakis and colleagues examined 33 articles published from 1999 to 2009 on how exercise intensity relates to pleasure. Pleasure tended to fall at intensities above the ventilatory or lactate threshold, but "when the intensity is self-selected, rather than imposed, it appears to foster greater tolerance to higher intensity levels". A pace that feels like your own is easier to come back to, which matters more than any one session. More on that in workouts that feel like a game.

How long should you shadow box

Count it against the weekly guideline, not a daily rule. The NHS tells adults to "do at least 150 minutes of moderate intensity activity a week or 75 minutes of vigorous intensity activity a week".

Which number applies depends on the talk test:

• If you can only get a few words out during rounds, you are working vigorously. About 25 minutes of rounds on three days a week reaches the vigorous target
• If you can still hold a conversation, count it as moderate and work toward 150 minutes across the week, or mix shadow boxing with other activity

You do not need long sessions. Guidelines no longer set a minimum length for a bout to count, so a few short rounds before work add up. See are short workouts worth it for the evidence. And the WHO is clear that "any amount of physical activity is better than none".

What makes the weekly total happen is repetition. Picking a fixed time and keeping sessions short enough to survive a busy week is most of how to stay consistent with working out.

What shadow boxing does not train

Shadow boxing moves your arms, shoulders and core, but there is no load. Your muscles move your own limbs through the air and nothing more. That is aerobic training, not strength training.

The NHS lists strength as a separate weekly job: adults should "do strengthening activities that work all the major muscle groups (legs, hips, back, abdomen, chest, shoulders and arms) on at least 2 days a week". It also notes the reverse: "Muscle-strengthening exercises are not always an aerobic activity, so you'll need to do them as well as your 150 minutes of aerobic activity". The WHO puts it simply: "muscle strengthening benefits everyone".

So pair shadow boxing with something that loads your muscles. Push-ups, squats and resistance bands at home are enough to start.

Where ShakeFit fits

ShakeFit is a rhythm workout game for your phone. Of its 93 tracks, fourteen are Boxing tracks, built mostly from jabs, crosses, hooks, uppercuts, slips and ducks, with front kicks and knee lifts in some. Tracks across the app run 3.1 to 5.4 minutes.

The hard part of shadow boxing alone is pace. Most people slow down between combinations because they are deciding what to throw next. In ShakeFit the combinations are set to music, so the next move arrives on the beat and the gaps stay short.

Be clear about what the app checks. Punches, slips and kicks are rhythm moves: the camera checks that you are moving in time with each beat, but it does not grade punching form, so it will not tell you whether your jab is clean. Some Boxing tracks are guided lessons that run without the camera at all. A grade word is a game score, not a measure of effort, so use the talk test for that. On an iPhone, if you let it read Apple Health, ShakeFit also shows the heart rate that an Apple Watch or a paired heart rate sensor measures while you play. And no study has tested whether ShakeFit produces the results in the research above.

ShakeFit is entertainment and general fitness software, not a medical device. If you have a health condition or are new to exercise, talk to a doctor first, and stop if you feel pain or dizziness.

Download on the App StoreGet it on Google Play

ShakeFit Plus adds adaptive weekly plans, long-term growth reports, custom sessions with tempo control and 5, 10 or 20-minute options depending on available movements, and full play of the 27 level 3 tracks

Questions people ask

Is shadow boxing a good workout for beginners?

Yes. It needs no equipment and you control the pace, which suits a beginner. Start with short rounds at a pace where you can still talk, then lengthen the rounds or shorten the rests as that gets easy.

How long should I shadow box for cardio?

Count it against the weekly guideline. If your rounds leave you able to say only a few words, that is vigorous effort, and about 75 minutes a week meets the guideline, for example 25 minutes on three days. At a conversational pace, aim for 150 minutes a week.

Is cardio kickboxing a good workout?

Yes. The CDC lists kickboxing classes among vigorous activities, and the Compendium of Physical Activities rates kickboxing at 7.3 METs, above the 6.0 threshold for vigorous intensity. Like shadow boxing, it trains fitness more than strength, so add strengthening activity on at least two days a week.

Is boxing at home a good workout?

It can be. Shadow boxing at home needs only floor space and counts as cardio when you keep moving between combinations. A punching bag adds variety but is not automatically harder. Add strength exercises separately, since punching the air does not load your muscles.

Sources

• Compendium of Physical Activities, Sports (entries for simulated boxing round, kickboxing, punching bag and martial arts)
• CDC, Measuring physical activity intensity
• NHS, Physical activity guidelines for adults
• World Health Organization, Physical activity fact sheet
• Ekkekakis, Parfitt and Petruzzello, The pleasure and displeasure people feel when they exercise at different intensities, Sports Medicine, 2011