Table 1 Project GRIT Participant Eligibility Criteria

• Aged 9–15 years.

• Inactive (self-reported as inactive; no specific criteria applied).

• Participant and parent or guardian able to support lifestyle changes and commit to a 12-week program between July – October 2018 with an intention of ≥80% attendance of all Project GRIT sessions.

• Known diagnosis of learning disorder and/or medical condition with which the multidisciplinary Project GRIT staff cannot provide sufficient support for, including: Attention Deficit Hyperactivity Disorder, Autism, Asperger Syndrome, Tourette Syndrome, or Bipolar Disorder.

• Known diagnosis of a medical condition which contraindicates high-intensity exercise, including:

o Hypertension as defined by systolic and/or diastolic blood pressure ≥ 95th percentile measured upon three or more occasions

o History or evidence of cardiac abnormalities or family history of hypertrophic obstructive cardiomyopathy

o Hypercholesterolaemia

o Chronic disease including but not limited to kidney disease, chronic asthma, diabetes (type I or II)

o Orthopaedic or neurological disorder which limits physical activity

o Pulmonary disease

• Current smoker

• Use of steroid medications

• Food allergy which would prevent the child from involvement in healthy eating or cooking demonstration sessions