Earlier quoted context omitted.
I love the example of HIIT. I discovered it inadvertently 10 years ago when I switched to recreational sprinting as a primary form of exercise. It results in excellent physical conditioning with a minimal time investment (about one hour per week total). Establishing habits is difficult and complex. Finding highly efficient (in time, energy, drudgery, money, etc) ways to achieve a desired outcome is a critically impor…
Any way for lazy people to get started with HIIT without going to a gym?
For me, one beautiful thing about sprinting is that you can do it anywhere you have a sufficiently lengthy stretch of open, flat ground. You can also shorten the sprint and do more of them to accommodate less permissive situations. I've even done wind sprints in my basement!