If concern for one's health wont get them to participate then maybe their competitive nature will.
In life people thrive to be the best. If you were to make a game out of becoming healthier with each task earning participants points and a prize to the individual with the most points you will get a greater number of followers.
People in life naturally have a competitive nature. If you were to use this competitive nature to your own advantage then you would be able to gain more of a following. If you simply ask someone to lead a healthier lifestyle then they may not see the advantages to it and choose to disregard you, however if they were to get something out of it then they would be more likely to participate. How it would work is each task would be a certain number of points. You could schedule things like going to the gym, yoga classes, choosing the healthier option for lunch, etc. The individual with the most amount of points at the end of the quarter receives some sort of prize, whether it be an extra vacation day, a small bonus, tickets to a show or something like that.
What are the benefits of your concept for the individual and the employer?
Benefits to the employer- healthier employees lead to more motivated and harder working employees. When people are healthier they are able to think more clearly and less likely to make errors. Likewise, a healthy worker is a happier worker and they will be more motivated
Benefits of the individual- those working for the employer will be leading a much healthier life style and ultimately lengthening their life span. Likewise, if they are to win they will receive an incentive.
What might the impact of your concept be and how might it be measured?
By the total number of points of all the participants. If the numbers are high then that means that your efforts were effective if they are low then that signifies a failed attempt.
How might you design a small experiment around your concept that would mobilise action?
do a month trial at a small corporation with a desirable, but small incentive and see how job performance is effected and what the level of participation is.