Study: NCT01277367

Intervention type: BEHAVIORAL
Group type: ACTIVE_COMPARATOR
Intervention: Discovery Vitality base program
Description: The existing Discovery Vitality health promotion base program, which offers points for various levels of physical activity.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Discovery Vitality base program
Description: The existing Discovery Vitality health promotion base program, which offers points for various levels of physical activity.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Discovery Vitality base program
Description: The existing Discovery Vitality health promotion base program, which offers points for various levels of physical activity.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Discovery Vitality base program
Description: The existing Discovery Vitality health promotion base program, which offers points for various levels of physical activity.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Discovery Vitality base program
Description: The existing Discovery Vitality health promotion base program, which offers points for various levels of physical activity.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Discovery Vitality base program
Description: The existing Discovery Vitality health promotion base program, which offers points for various levels of physical activity.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Communication
Description: Participants will be sent regular communications by Discovery Vitality -equivalent to the level of communications in the other incentive groups - which will provide information and tips about ways of accumulating Vitality points on the existing programme (concerning fitness-related activities, in particular).

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Charitable Incentive
Description: Members will be asked to nominate a charity, from a selection of charities, which will benefit financially (Discovery Vitality will make a direct payment to a nominated charity) based on their (member's) level of participation in points-earning physical activity. Individuals will receive one of four possible payouts, corresponding to their level of engagement, for their selected charity (amounts given below). In addition, members will be sent regular updates of activities by their nominated charities (This will be operationalised and facilitated by Vitality- and as such, no direct mailing from nominated charity will take place, to maintain confidentiality.)

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Prize Draw Incentive
Description: Members will be entered into a prize draw for a monthly cash-prize if they achieve physical activity targets. Four lottery payouts, corresponding to their levels of engagement, will be made on a monthly basis. All members will be sent information regarding the winnings of those that are drawn (unlinked to personal identifiers, but to motivate).

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Direct Payment
Description: Members will receive a direct payment (in the form of gift voucher) of one of four possible amounts depending on the level of participation in fitness-related activities equivalent in expected value to the payouts in arms 3 and 4.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Free Choice
Description: Members will be asked to choose one of the three aforementioned incentive options on enrollment to the study.