Start with a 10 minute cardio session with running a lap with medium speed or just running on the treadmill.
Abstain from doing exercises which focus on a particular muscle group, like biceps curls, leg extensions, triceps push downs and such stuff.
It can consist of 50 yard sprints, running with high knees or similar stuff.
Choosing 3 exercises which involve different muscle groups change over to Dead lift, push ups and seated rows.
Now finish the Workout with 10 minutes of core muscles training such as planks and french twists.