90b630fc_g_Strollers_2015_Expert_Review__Why_
[Stroller’s features] Handbrake & parking brakes [Avoid] Models with no parking brakes – as jogging strollers may roll off when left unattended. [Why?] 
The handbrake maintains form and pace when running downhill. Critical for rollerblading – for emergency braking
Top 5 Best Jogging Strollers 2015 Expert Review
Why?