# The Science of Stick and Ball · Field Hockey, Taso 6: Edistynyt

Field Hockey · Taso 6: Edistynyt · Insporta Book (https://book.insporta.app/fi/field-hockey/level-6/the-science-of-stick-and-ball/)

The Science of Stick and Ball: 100 faktaa, 10 testiä.

The physics and biology behind the game, kept to what the equipment rules and coaching sources support: stick materials and bow, the ball on turf and in the air, water on the pitch, the drag-flick's speed, grip, protective kit, reaction time, the body in a match and how equipment is tested.

## Testi 1: The stick's materials

- Fibreglass, carbon fibre and Kevlar were applied to stick cores in the early 1970s. (Lähde: Official results (Olympedia, FIH), see FIELD_HOCKEY_VERIFIED_FACTS.md, History)
- A stiff shaft returns more energy to the ball. (Lähde: USA Field Hockey, Field Hockey 101 (2025))
- Wood is less rigid and more forgiving when stopping the ball. (Lähde: USA Field Hockey, Field Hockey 101 (2025))
- Stiff sticks make the ball bounce off more. (Lähde: USA Field Hockey, Field Hockey 101 (2025))
- Specifications cap the stick's weight. (Lähde: FIH Rules of Hockey 2027 (player's view), Specifications)
- The stick must pass through a 51 mm ring. (Lähde: FIH Rules of Hockey 2027 (player's view), Specifications)
- Carbon adds stiffness. (Lähde: USA Field Hockey, Field Hockey 101 (2025))
- Wood is most forgiving. (Lähde: USA Field Hockey, Field Hockey 101 (2025))
- Layers, shape, cure, finish. (Lähde: USA Field Hockey, Field Hockey 101 (2025))
- Composite sticks use carbon fibre layers. (Lähde: Official results (Olympedia, FIH), see FIELD_HOCKEY_VERIFIED_FACTS.md, History)

## Testi 2: The bow and the flick

- The bow is the curve along the stick. (Lähde: FIH Rules of Hockey 2027 (player's view), Specifications)
- Bow must not exceed 25 mm. (Lähde: FIH Rules of Hockey 2027 (player's view), Specifications)
- A curved shaft cradles the ball for lifting. (Lähde: USA Field Hockey, Field Hockey 101 (2025))
- Low-bow sticks put the curve close to the head, helping lifts. (Lähde: USA Field Hockey, Field Hockey 101 (2025))
- Deeper bows could make shots more dangerous. (Lähde: FIH Rules of Hockey 2027 (player's view), Specifications)
- Bow aids lifting and flicking. (Lähde: USA Field Hockey, Field Hockey 101 (2025))
- Style and weight are personal preference within limits. (Lähde: USA Field Hockey, Field Hockey 101 (2025))
- From none to the limit. (Lähde: FIH Rules of Hockey 2027 (player's view), Specifications)
- Lifting shots rely most on the bow. (Lähde: USA Field Hockey, Field Hockey 101 (2025))
- The gap under the curve is the bow. (Lähde: FIH Rules of Hockey 2027 (player's view), Specifications)

## Testi 3: The ball in flight

- Launch angle and speed set the flight. (Lähde: General field hockey reference)
- A smooth surface keeps the ball moving. (Lähde: USA Field Hockey, Field Hockey 101 (2025))
- A hard falling ball can injure; hence the 5-metre rule. (Lähde: FIH Rules of Hockey 2027 (player's view), Rule 9.10)
- Air drag slows a moving ball. (Lähde: General field hockey reference)
- Gravity pulls it down. (Lähde: General field hockey reference)
- As speed falls, the curve steepens. (Lähde: General field hockey reference)
- The 460 mm limit protects defenders. (Lähde: FIH Rules of Hockey 2027 (player's view), Rule 13.3l)
- Up, peak, down. (Lähde: General field hockey reference)
- Ground, low, high. (Lähde: FIH Rules of Hockey 2027 (player's view), Rule 13.3l)
- Gravity curves every lifted ball back down. (Lähde: General field hockey reference)

## Testi 4: Turf and water

- Watering makes the ball run fast and true. (Lähde: USA Field Hockey, Field Hockey 101 (2025))
- A wet surface lets the ball skid smoothly. (Lähde: General field hockey reference)
- Dimpled balls reduce aquaplaning on wet surfaces. (Lähde: USA Field Hockey, Field Hockey 101 (2025))
- Synthetic turf made the game faster and passing more effective. (Lähde: KNHB/SAHA Field Hockey Activity Guide, Tactics)
- The chop is only used on astro fields. (Lähde: KNHB/SAHA Field Hockey Activity Guide, Glossary)
- Sand between fibres slows the ball. (Lähde: USA Field Hockey, Field Hockey 101 (2025))
- Montreal 1976. (Lähde: Official results (Olympedia, FIH), see FIELD_HOCKEY_VERIFIED_FACTS.md, Olympics)
- Watered turf is fastest. (Lähde: USA Field Hockey, Field Hockey 101 (2025))
- Check, water, settle, play. (Lähde: USA Field Hockey, Field Hockey 101 (2025))
- Water makes the ball skid smoothly. (Lähde: USA Field Hockey, Field Hockey 101 (2025))

## Testi 5: Speed of the drag-flick

- Speed plus height leaves little reaction time. (Lähde: General field hockey reference)
- Power comes from the body and the drag. (Lähde: KNHB/SAHA Field Hockey Activity Guide)
- Longer contact means more acceleration. (Lähde: KNHB/SAHA Field Hockey Activity Guide, Flick/overhead)
- Protective equipment guards against fast shots. (Lähde: FIH Rules of Hockey 2027 (player's view), Rule 4.2)
- Power builds from the ground up. (Lähde: KNHB/SAHA Field Hockey Activity Guide)
- Staying low lengthens the drag. (Lähde: KNHB/SAHA Field Hockey Activity Guide, Flick/overhead)
- Flicks may rise but must not be dangerous. (Lähde: FIH Rules of Hockey 2027 (player's view), Rule 13.3m)
- Maasta ylöspäin. (Lähde: KNHB/SAHA Field Hockey Activity Guide)
- The flick is fastest of these at the top level. (Lähde: General field hockey reference)
- Fast shots leave almost no time to react. (Lähde: General field hockey reference)

## Testi 6: Grip and vibration

- A grip wrap gives a firm, comfortable hold. (Lähde: USA Field Hockey, Field Hockey 101 (2025))
- Impacts send vibration up the shaft. (Lähde: General field hockey reference)
- Dampening cuts the sting in the hands. (Lähde: General field hockey reference)
- Gloves protect, improve grip and keep hands warm. (Lähde: USA Field Hockey, Field Hockey 101 (2025))
- Hand protection must not increase the natural size of the hands significantly. (Lähde: FIH Rules of Hockey 2027 (player's view), Rule 4.2)
- A slippery grip loses control. (Lähde: USA Field Hockey, Field Hockey 101 (2025))
- Strengthen the grip by holding tightly with both hands. (Lähde: KNHB/SAHA Field Hockey Activity Guide, Two-hand block tackle)
- Dry and new is best. (Lähde: USA Field Hockey, Field Hockey 101 (2025))
- Off, clean, wrap, fix. (Lähde: USA Field Hockey, Field Hockey 101 (2025))
- A fresh grip improves hold. (Lähde: USA Field Hockey, Field Hockey 101 (2025))

## Testi 7: Protective kit and impact

- Hard plastic shields spread impact. (Lähde: USA Field Hockey, Field Hockey 101 (2025))
- Mouth guards prevent dental injury. (Lähde: USA Field Hockey, Field Hockey 101 (2025))
- Padding absorbs the ball's energy. (Lähde: USA Field Hockey, Field Hockey 101 (2025))
- Players must remove corner equipment before playing outside their 23. (Lähde: FIH Rules of Hockey 2027 (player's view), Rule 13.3n)
- Protective headgear at all times, except when taking a stroke. (Lähde: FIH Rules of Hockey 2027 (player's view), Rule 10.1)
- Players must not wear anything dangerous to other players. (Lähde: FIH Rules of Hockey 2027 (player's view), Rule 4.2)
- A close fit stops the mask moving when struck. (Lähde: FIH Rules of Hockey 2027 (player's view), Rule 4.2)
- Head down. (Lähde: FIH Rules of Hockey 2027 (player's view), Rule 4.2)
- The keeper wears the most. (Lähde: USA Field Hockey, Field Hockey 101 (2025))
- Hard outside, soft inside. (Lähde: USA Field Hockey, Field Hockey 101 (2025))

## Testi 8: Reaktioaika

- Narrowing the angle covers more goal. (Lähde: KNHB/SAHA Field Hockey Activity Guide, Six-a-side)
- Ennakointi ostaa aikaa. (Lähde: KNHB/SAHA Field Hockey Activity Guide, Important)
- Weight on the balls of the feet in the channel position. (Lähde: KNHB/SAHA Field Hockey Activity Guide, Two-hand block tackle)
- Late direction changes beat reaction time. (Lähde: KNHB/SAHA Field Hockey Activity Guide)
- Scanning means less to think about on the ball. (Lähde: KNHB/SAHA Field Hockey Activity Guide, Glossary)
- Commands train quick reactions in a fun way. (Lähde: KNHB/SAHA Field Hockey Activity Guide, Warm-up activity 1)
- The actions are opposite to the commands so players listen carefully. (Lähde: KNHB/SAHA Field Hockey Activity Guide, Warm-up activity 2)
- See, go, win. (Lähde: KNHB/SAHA Field Hockey Activity Guide, Interception tackle)
- The closer and later, the less time. (Lähde: KNHB/SAHA Field Hockey Activity Guide)
- At 'Hit the Deck' players lie down as fast as possible. (Lähde: KNHB/SAHA Field Hockey Activity Guide, Warm-up activity 1)

## Testi 9: The body in a match

- A good warm-up prepares players and can prevent injuries. (Lähde: KNHB/SAHA Field Hockey Activity Guide, Warm-up)
- Easing down right after play is the last step of the day. (Lähde: KNHB/SAHA Field Hockey Activity Guide, Cool-down)
- Children's muscles are naturally suppler. (Lähde: KNHB/SAHA Field Hockey Activity Guide, Warm-up)
- Substitutes must remain warm. (Lähde: KNHB/SAHA Field Hockey Activity Guide, Warm-up)
- Running without the ball is quicker than dribbling. (Lähde: KNHB/SAHA Field Hockey Activity Guide, Six-a-side)
- Ensure everyone hydrates. (Lähde: KNHB/SAHA Field Hockey Activity Guide, Half-time)
- Substitutions are permitted at any time, with exceptions at corners. (Lähde: FIH Rules of Hockey 2027 (player's view), Rule 2.3)
- Pulse, loosen, stretch, skills. (Lähde: KNHB/SAHA Field Hockey Activity Guide, Warm-up)
- Prepare, play, recover, wash. (Lähde: KNHB/SAHA Field Hockey Activity Guide, Cool-down)
- Cool-downs help prevent lactic acid build-up. (Lähde: KNHB/SAHA Field Hockey Activity Guide, Cool-down)

## Testi 10: Equipment testing

- The FIH publishes field and equipment specifications. (Lähde: FIH Rules of Hockey 2027 (player's view), Specifications)
- Field and Equipment Specifications 1-4. (Lähde: FIH Rules of Hockey 2027 (player's view), Specifications)
- The ring test. (Lähde: FIH Rules of Hockey 2027 (player's view), Specifications)
- 156-163 g. (Lähde: FIH Rules of Hockey 2027 (player's view), Specifications)
- Specifications cover the field as well. (Lähde: FIH Rules of Hockey 2027 (player's view), Specifications)
- The rules and equipment for men and women are the same. (Lähde: USA Field Hockey, Field Hockey 101 (2025))
- Only legal equipment may be used. (Lähde: FIH Rules of Hockey 2027 (player's view), Rule 4.2)
- Thickness, weight, bow, length. (Lähde: FIH Rules of Hockey 2027 (player's view), Specifications)
- 25 mm, 51 mm, 105 cm. (Lähde: FIH Rules of Hockey 2027 (player's view), Specifications)
- Balls must weigh 156-163 g. (Lähde: FIH Rules of Hockey 2027 (player's view), Specifications)

Lähteet: KNHB/SAHA Field Hockey Activity Guide, USA Field Hockey 101, NFHCA notes, FIH history and official results; original questions authored, nothing reproduced. Numbered rules belong to the Rules category (Field Hockey - Rules of Hockey).

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