HIIT workout obsessives, have no fear: this trend is in no danger of waning. Over 12k of you Google it monthly, and it's now practised by the likes of Beyoncé and Jessica Alba, but it's been ...
HIIT is a type of workout that alternates between short bursts of intense activity and periods of rest or lower-intensity exercise. A typical HIIT session might include 20 to 40 seconds of hard ...