Use of pedometer trackers increases step count. See excerpts from the 2007 Stanford University Meta-Study below.

Purpose:  The primary purpose of this study was to evaluate the association between pedometer use and physical activity among adults in the outpatient setting. Additionally, we sought to determine the association between pedometer use and changes in body weight, serum lipid levels, fasting serum glucose and insulin, and blood pressure.  Finally, we sought to evaluate the association between setting a daily step goal and improvements in health outcomes.

Results:  Overall, pedometer users increased their physical activity by 26.9% over baseline.

Conclusions: The results suggest that the use of a pedometer is associated with significant increases in physical activity and significant decreases in body mass index and blood pressure. Whether these changes are durable over the long term is undetermined.