This is a voluntary community challenge, not personalised medical, fitness or dietary advice. Choose an intensity appropriate for you. If you have not exercised for some time, are pregnant, are injured, take medication, live with a health condition or have concerns about food or exercise, speak to an appropriate healthcare professional before starting.
If you have a current or previous eating disorder, rigid food rules may be unsuitable. Do not use this challenge as a weight-loss treatment. If you may be dependent on alcohol, do not stop drinking suddenly to meet the rule—NHS guidance warns that sudden withdrawal can be dangerous. Seek medical or alcohol-service advice first.
The standard challenge is designed for adults. Anyone under 18 should only take part with a parent or guardian and appropriate professional guidance.