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Coco’s Cannon

You’re 5’ 9’’, 140 lbs (1.79m, 64kg), and female. How hard can you serve? Answer: at least 124 mph (200 km/h), because that’s how fast the rocket Coco Gauff threw down in her third...

Roddick's trophy pose (static) next to his back scratch position (dynamic)

Dynamic vs Static Positions

While there are numerous different teaching mistakes that lead to ineffective coaching, many of them stem from the same fundamental misunderstanding – confusing cause and effect. Some body movements are actively, volitionally caused by the...