Table 1 Inclusion and exclusion criteria

Inclusion criteria:

 (1) desire to lose weight

 (2) aged 35–60

 (3) BMI of 30 to 45 kg/m²

 (4) able to access to the internet via a computer or other device.

Exclusion criteria:

 (1) medical-conditions, such as coronary artery disease, type I diabetes or insulin-treated type 2 diabetes, stroke or cognitive impairment, terminal illness

 (2) unable to read, write, or understand English

 (3) learning difficulties

 (4) taking medication that could affect weight.