" NGR (No Gym Required) Shoes Price: $160
The idea here is simple: Extra weight equals a tougher workout. Equipped with removable 1.5- to 2-pound midsoles, NGRs burn up to 50 percent more calories than a normal shoe.
Pros: Sleeker look, additional fitness videos on the NGR website
Cons: Heavy to transport, can’t wear (when weighted) during all activities (e.g. driving)