Health kit wrong steps, Users have more than expected steps. Is it possible to add wrong steps in health kit using jailbreak iPhone?

We are using "Health kit" App to read steps. We introduce challenge to motivate users to walk. We get some complain about users having more than 50,000 steps per day even though they are not so active. When Investigate we found they have 6,000 per day average before challenge start and during challenge it increases suddenly upto 50,000 per day for a month. We are not considering manual steps from health kit. We suspect steps are not right, so is it possible to get dummy or wrong steps using jailbreak iPhone? Does anyone know about any other way to identify reason of a wrong steps?