In today’s modern world, the number of obese people increases drastically than in the past. Among other things, strength training plays a big role in preventing and managing obesity. Mobile fitness systems can be used to analyze obesity in a data sharing mechanism. Algorithms can recommend exercise equipment based on the user's BMI and provide previous users historical data as reference. It will also show caloric values exhausted through outdoors exercise for strength training that is currently being used. Accordingly, in this paper, Recommend the exercise equipment according to the user's BMI (Body Mass Index) indices, and the exercise equipment other users who have used that is a member of the BMI group, such as a user Divide to group users based on the data-sharing mechanism to inform the user the mobile Fitness system was developed. Data sharing mechanism allows providing a generalized data using inductive reasoning method to solve the problem of the absence of an existing system, the service data, and fitness exercise equipment Recommend.