A Tabata workout is an excellent option for those who are short on time.
The Tabata workout is just 4-minutes long, but with bursts of high-intensity exercise and little rest, the purpose is to improve your fitness levels in a short period of time.
Add weights to make the exercises more challenging.
There are songs mainly designed for Tabatas and are available on youtube.
Workout: 20 seconds work / 10 seconds rest
Complete 2 rounds of T1 before moving to T2 etc.
Rest 30-45 seconds between each round.
Sprint on the spot