The Year in Fitness: Exercise, Add Intensity, Live to See Another Year
Some of the best health/exercise-research over the last year has shown that any exercise can be beneficial to health and well-being... even changing your genetic expression and gut microbiome!
Adding intensity to your exercises, even for short bursts, has also been shown to be very beneficial:
intense exercise seemed to be changing muscle cells in ways that theoretically could affect biological aging.
Source: https://www.nytimes.com/2017/12/27/well/move/the-year-in-fitness-exercise-add-intensity-live-to-see-another-year.html