Things to avoid
If you are even a moderately serious runner, avoid any non-GPS or pedometer-based training device. Unless you only work out indoors, they provide less data, and pedometers alone aren't accurate or reliable enough.
Don't try to use a fitness tracker like the FitBit or Jawbone Up to replace a GPS watch. They do track movement, but they don't provide any feedback during your workout.
Also avoid, running watches with an external GPS pod. You'll never remember to keep both of them charged and stored in the same place.
Next time: Picking the right fitness gadget for gym rats.
Sign up for CIO Asia eNewsletters.