Yes, 4 minutes and I found myself dripping in sweat, gasping for air, and pretty much throwing out the white flag.
Meet Tabata. This is going to be your new best friend that you love to hate. Tabata is a form of high intensity interval training that originates from Japan. It takes just 4 minutes to complete, but rest assured, you are working to your absolute max and will see results.
Depending on what you fitness goals are (fat loss, muscle endurance, strength gains, etc.) you will pick several exercises and work at maximum intensity for 20 seconds with 10 seconds of rest between each for a total of 4 minutes.
Here’s a sample of a Tabata workout that I have used myself: