For me, it wasn't about efficiency. Walking turned out to be the one thing I could work into my routine and actually do consistently every day. A big reason was

For me, it wasn't about efficiency. Walking turned out to be the one thing I could work into my routine and actually do consistently every day. A big reason was that I enjoyed it. Threre are a couple health benefits that walking has over HIIT. For my particular case, my doctor told me that the amount of time I sustained an elevated heart rate was more important than how hard I pushed myself (don't try to walk the same distance in a shorter time, instead walk for longer). And there are cognitive benefits unique to walking [1]. I can't speak for anyone else, but waking turned out to be my gateway drug to all kinds of other healthy lifestyle changes. [1] https://www.theatlantic.com/health/archive/2014/10/walking-for-a-better-brain/380066/ https://www.theatlantic.com/health/archive/2014/10/walking-f...