Lab Trial In the lab phase, participants that completed the field trial and were randomized to the bowling, boxing, or J-Mat exergames were eligible to participate in the lab trial. During the lab trial, participants will play two subgames (a hi fidelity and a lo fidelity game) from the game that they were randomized to. Participants also completed a relative reinforcing value (RRV) task to assess reinforcing value of Xavix subgames ranked on theoretical fidelity and exertion. The RRV task is a method to measure the responsiveness of individuals to two or more choices. In the context of competing choice options, the RRV task assesses how much work an individual would be willing to do given increasing response effort to gain access to each option.