Forget about hills, forget about sweating, and forget about getting any actual exercise.
The new trend in bicycle locks is integrating an existing feature and transforming it into a lock. With the new Quick Stand & Lock, it's built into the kickstand.
U-locks are ok, and monster chains are a bit better but we all know thieves can be crafty when picking a lock, no matter what the size. What if there was an easy way to prevent your bike from being usable should someone tinker with your lock? That's exactly the idea behind bike pedals that also serve as your bike lock.