HIIT and LISS offer different benefits, experts say

HIIT uses short bursts of hard effort with breaks, while LISS means steady activity such as walking or cycling.

HIIT can take about 20 minutes, but it needs more recovery and may not suit people new to exercise.

LISS sessions usually last 30 to 60 minutes and let you keep talking as you move.

The two methods offer different benefits, so experts recommend choosing a routine you can keep up and combining them when suitable.