Exercising intensely, but for a short time may give the same result as a longer moderate activity, at least regarding the mitochondrial functions
No time for the gym? Try short high-intensity exercise! - short science news - health

Many of us use the excuse of not having enough time to skip physical activity, like going to the gym. However, a new study shows there may be a workaround for this. According to the research, a few minutes of high-intensity interval or sprinting exercise induce beneficial improvements in mitochondrial function. Altered mitochondrial function in response to exercise generates signals that may lead to beneficial changes in the cells. Different types of physical exercises were tested and the study found that fewer minutes of higher-intensity exercise produced similar mitochondrial responses compared to a longer moderate-intensity activity. To take note that the study looked at mitochondria, however there may be other changes in the organism that are different between the two types of training.

Read the full story: Medicalxpress
Scientific publication: American Journal of Physiology—Regulatory, Integrative and Comparative Physiology