Table 1.

Descriptions of low-intensity early activity interventions

	Intervention
	Bed-to-sitting	Sitting-to-walking
Goals	- To facilitate vascular return. - To reduce dizziness, tiredness and unsteadiness on feet upon ambulation following bed rest. - To prevent misconceptions about bed rest. - To ultimately prevent bed rest dependency and functional decline.	- To facilitate vascular return. - To reduce dizziness, tiredness and unsteadiness on feet upon ambulation following bed rest. - To prevent misconceptions about bed rest. - To ultimately prevent bed rest dependency and functional decline. - To train the body to get used to being up again.
Activities	- Point and flex toes while lying supine. - Slide feet back and forth toward buttocks, one at a time. - Lift buttocks up and down, as high as tolerated. - Slide legs, one at a time, out to side and back again. - Lift feet up and down, one at a time. - Sit on edge of bed with feet against floor for up to 10 min. - While sitting, lift heels up and down. - While sitting, lift knees up and down. - Return to lying in bed.	- Sit on edge of bed with feet against floor for up to 10 min. - While sitting, lift heels up and down. - While sitting, lift knees up and down. - Stand and sit in chair with feet touching the floor, and/or walk as tolerated.
Mode	- In bed and sitting on edge of bed	- Sitting at side of bed or chair and walking in room or hallway.
Dose	- Within 48 h of admission. - Each individual exercise is performed 10 times at least twice a day.	- Within 48 h of admission. - At least twice a day. - Number and length of sessions gradually increased until sitting in a chair with feet touching the floor and/or walking ≥ 3.5 h/ day as tolerated.