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Questions we couldn't include and what the reasons for these decisions were.

Questions that included food or drink interventions
Reason to not include these questions:
We will not include these questions because many families have very strict rules around food and drink. According to our university, diet interventions are also considered medical interventions and are too risky to try in our trial. 

Does eating junk food make a difference to kids' health compared to not eating junk food?

Does eating a carrot every day make a difference to reading with the light off at bedtime compared to not eating a carrot each day?

Does eating a high protein breakfast make a difference to school performance in the morning compared to eating carbs for breakfast?

Why is the food that most children don't like to eat is the most healthy?

Does drinking milk make a difference to kids' strength compared to drinking less milk?

Does eating sweets before bed make a difference to how long kids sleep compared to not eating sweets before bed?

Questions that included screen time interventions
Reason to not include these questions:
We will not include these questions because many families have very strict rules around screen time. Many children also don't have access to screens all the time. Because of this, these questions would keep many kids from joining the trial.

Does playing video games make a difference to kids' moods compared to screen-free time?

Does more screen time make a difference to concentration levels/mood compared to less screen time?

Other questions and the reasons we couldn't include them.

Does going outside after school for 30 minutes make a difference to fitness compared to staying inside?

Reason to not include:

We will not include this question because it doesn’t allow many kids to join the trial. Many kids must spend time outside every day.

Does running make a difference to strength in your arms and legs compared to not running?

Reason to not include:

We will not include this question because it will be very difficult to test this in the time that we have. Strength often does not change enough to measure in a week.

Does taking deep breaths before doing something make a difference to kids' decision making compared to not slowing down and taking a deep breath?

Reason to not include:

We will not include this question because it will be very difficult to test this. We're not sure how we can test decision making. 

Does doing the same 2 minute exercise make a difference to kids' heart rates compared to each other?

Reason to not include:

We will not include this question because it would require an assessment of heart rates among children and we have no baseline measures. Additionally, there are probably too many differences between kids to do a high quality test. 

Does having a shower every day make a difference to kids' hygiene compared to not have a shower every day?

Reason to not include:

We will not include this question because, although we know hygiene is important, there are too many children who cannot bathe every day because of their lifestyles or access to water. This would mean a lot of children could not join the trial.

Does going to sleep earlier make a difference to kids' moods compared to not going to sleep earlier every day?

Reason to not include:

We will not include this question because, it is too difficult to tell families what time children should go to bed or wake up. Many children have too many commitments that do not allow for this intervention, and could not join the trial.

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