There's no magic number for how long your workout should go for muscle and strength gains. Here are the factors that play into how long you should work out.

What is a Tabata workout? In a traditional Tabata workout, you will perform an exercise at max intensity for 20 seconds and then rest for 10 seconds. This repeats 8 times for a total of four minutes.

Under 15-minute beginner resistance band workout Length: 12:30 Equipment needed: Tube bands with handles This is a great beginner's workout — whether you're new to working out with resistance ...

For the regular person, a 4-minute Tabata workout is usually repeated up to 5 times, for a full workout that's 20 minutes long — which is still pretty short, just not 4-minutes-short.