Key result
Small amounts of vigorous intermittent physical activity (three or more daily bouts of 1-2 minutes) were associated with a 38%-40% reduction in all-cause and cancer mortality compared to none at all.
Why the study?
The emergence of micro-workout and micro-training concepts indicates a paradigm shift toward minimizing the dose of exercise or physical activity required for health and longevity.
Does micro-workout/micro-training reduce mortality risk and improve maximal oxygen uptake in the general population compared to no exercise?
Does micro-workout/micro-training reduce mortality risk and improve maximal oxygen uptake in the general population compared to no exercise?
Effect estimate: 38%-40% reduction in all-cause and cancer mortality; 48%-49% reduction in cardiovascular mortality
Micro-workouts consisting of very short bouts of vigorous physical activity may significantly reduce cardiovascular and all-cause mortality, offering a time-efficient strategy for exercise promotion.
Micro-workouts may lower mortality risk; hypothesis-generating and requires RCTs before practice change.
Background: Recently, the terms ‘micro-workout ‘and ‘micro-training’ have been coined and promoted in the health and training industries, indicating a paradigm shift in the dose of exercise/physical activity for health and longevity. Methods: Evidence for minimizing the dose of exercise to improve health and reduce mortality risk is accumulating in two ways. One is the epidemiological studies using questionnaires/accelerometers. The other is the traditional laboratory-based studies investigating exercise protocols to improve maximal oxygen uptake during high-intensity interval training or sprint interval training. Results: The latest evidence is that, during an average follow-up of 6.9 years, there was a 38%–40% greater reduction in the risk of all-cause and cancer mortality and a 48%–49% greater reduction in the risk of cardiovascular mortality in those who did small amounts (three or more daily bouts of 1 or 2 minutes’ duration as assessed by accelerometer) of vigorous intermittent physical activity than in those who did none at all. For sprint interval training, two or three 20-second vigorous bursts with a few minutes rest in between, 3 times a week, can improve maximal oxygen uptake. Conclusion: Health professionals and clinicians should remember this evidence to improve adherence to exercise/physical activity in general population, especially in non-exercisers. In this regard, use of micro-workout and micro training is beneficial for exercise promotion.
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Shigenori Ito (2025) conducted a review in General population, especially non-exercisers. Micro-workout / vigorous intermittent physical activity vs. None at all was evaluated on All-cause, cancer, and cardiovascular mortality (38%-40% reduction in all-cause and cancer mortality; 48%-49% reduction in cardiovascular mortality). Small amounts of vigorous intermittent physical activity (three or more daily bouts of 1-2 minutes) were associated with a 38%-40% reduction in all-cause and cancer mortality compared to none at all.
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