Sleeping on the floor isn’t for everyone. It may not be safe for some individuals, including: 

• Older adults. As we age, our bones become weaker, and we lose fatty tissue. Sleeping on the floor may increase the risk of fractures or feeling too cold. 
• People who are prone to feeling cold. Conditions like anaemia, type 2 diabetes, and hypothyroidism can make you feel cold. Since heat rises, the floor is often cooler than the rest of the room. During the winter, a cold floor can rapidly reduce your body heat, making you feel colder than usual. 
• People with limited mobility. If you have difficulty sitting on the floor or getting back up, sleep on a bed instead. You should also avoid floor-sleeping if you have joint issues like arthritis.
• People that have back pain and those that suffer with allergic reactions should also consider if this is the right challenge for them. 

For those that have any doubt on if this challenge  is right for you, please seek your doctor’s advice