[TChad]

Since the article does not bother to define HIIT...

https://en.wikipedia.org/wiki/High-intensity_interval_training

[newfreep]

I engage in HIIT 5-6 times a week:

2 minute cycles
30 seconds High Intensity
90 seconds “normal”
HIIT program for 20-25 minutes

ALWAYS USE A HEART RATE MONITOR - a chest strap monitor is best.

Polar makes a quality HRM and provides smart phone apps to monitor and track your progress.

[Blueflag]

I started HIIT training at age 63. Made a huge difference in my life.

Athlete in prior life, but became a tad sedentary.

Totally recommend HIIT

[Right Wing Assault]

Nitric Oxide Dump? Here, with video demos.

https://www.mercola.com/calendar/2018/fitness.htm