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Tennis shoes: why running shoes do not work
Lateral movement, outsole by surface, and the most common injury from wearing the wrong shoe.
Of all tennis gear, shoes are where people cut costs most and where it is the worst idea. It is not about brand: a running shoe is built for the opposite of what a tennis player does.
Running goes forward, tennis goes sideways
A running shoe is built to cushion vertical impact and push you forward. It is tall, soft and narrow at the base. The moment you make a hard lateral move, your foot slides off the platform.
A tennis shoe is lower, wider at the base and far more reinforced on the sides, precisely to handle that movement. It also has a toe guard where players drag when braking.
The injury we are talking about
Lateral ankle sprains are the most common injury in recreational tennis, and the wrong footwear is a direct factor. A tall, soft shoe in a sharp change of direction is an ankle waiting to roll.
Outsole by surface
| Surface | Outsole | Why |
|---|---|---|
| Hard court | Modified herringbone, dense rubber | Handles abrasion, which is brutal |
| Clay | Full herringbone | Sheds clay and lets you slide |
| Grass | Small nubs | Grip without damaging the turf |
| All court | Hybrid | A reasonable compromise across surfaces |
In Puerto Rico nearly everything is hard court, so hard-court outsoles are what you need, and outsole durability matters more here than elsewhere.
How to know they are done
- The tread is smooth under the forefoot.
- The shoe feels unstable on changes of direction.
- New knee or ankle complaints appear with nothing else changed.