Table 2.

Bed rest studies transferability.

	Strollo et al.27	Smith et al.30	Belavy et al.6	Liang et al.28	Smorawinski et al.29	Zachwieja et al.10
6° head-down tilt	x	✓	x	✓	x	✓
Individualised and controlled diet	?	?	✓	✓	✓	✓
Set a daily routine with fixed wake/sleep time	x	?	?	✓	?	?
Bed rest phases are standardized for all participants.	?	✓	✓	✓	✓	✓
Uninterrupted bed rest except for test condition	✓	?	✓	✓	x	✓
Sunlight exposure prohibited	?	?	?	?	?	?
All measures were taken on the same day and time.	?	?	✓	✓	✓	?
Bed rest duration	1 hour	60 or 90 days	56 days	45 days	3 days	28 days
Total points	2	3	5	7	4	4