1. Leg lift: Lie on the bed, lift one leg, and then slowly lower it. Repeat this action 10- 15 times, and then change the other leg.

2. Squat: Sit on the bed with your feet flat on the ground and your hands at your sides. Then slowly squat down until your thighs are parallel to the ground, and then stand up slowly. Repeat this action 10- 15 times.

3. Kicking: Lie on the bed, straighten one leg, and then lift your knees so that the calf and thigh form a 90-degree angle. Then slowly lower your knees and lift them again. Repeat this action 10- 15 times, and then change the other leg.

4. Skipping rope: If you have skipping rope, you can jump a few times by the bed. If you don't jump rope, you can use a solid object instead, such as a heavy book.

5. Climbing stairs: If the bed is not high above the ground, try climbing stairs on the bed. Climb from bed to bed, and then climb back to bed. Repeat this action several times.

Please note that you should consult a doctor or professional coach before doing any exercise.