Jogging is a good warm-up and efficient exercise and can easily be done at home. Just lightly hope from one foot to another.
Jumping jacks can be done at any place. By jumping higher or quicker, one can raise the intensity of the workout.
If you have access to a lawn or terrace, then skipping is one of the best exercises you can do while staying indoors.
Start in a plank position, keep your torso straight and hands beneath your shoulders. Raise your one knee near your chest, and switch quickly by lifting your other knee.
During Squats one has to start by lowering the hips, bend knees to lower down, but keep chest lifted. Press through heels and stand back up. Repeat.
One should end the workout with the stretching exercise as it reduces tightness, improves flexibility and ultimately completes the workout.
Check 6 Workouts To Do Indoors - IN PICS