Results from video analysis of the riding situation preceding the injury in SBX
| Riding situation | Contact | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Influence on | |||||||||||||
| Case # | Specific diagnosis | Sex* | Accuracy (ms)† | Out of balance | Course-line | Speed | Technical error | Location of error | Contact | Injured rider | Rider control | Injury | Position** |
| Jumping | |||||||||||||
| 1 | Concussion | M | ±30 | Lost balance | Inappropriate | Normal | Yes | Take-off | No contact | ||||
| 2 | Concussion | F | ±160 | Lost balance | Appropriate | Normal | Yes | Take-off | No contact | ||||
| 3 | Fracture UE††/radius | M | ±70 | Backwards | Inappropriate | Normal | Yes | Take-off | Unsure | ||||
| 4 | Contusion low back | F | ±110 | Lost balance | Appropriate | Normal | Yes | Take-off | No contact | ||||
| 5 | Multiple trauma | M | ±230‡ | Lost balance | Inappropriate | Normal | Yes | Take-off | No contact | ||||
| 6 | Quadriceps rupture‡‡ | F | ±490¶ | Lost balance | Appropriate | Normal | Yes | Landing | No contact | ||||
| 7 | Knee injury/ligament | M | ±490§ | Forwards | Appropriate | Normal | Yes | Landing | No contact | ||||
| 8 | Muscle injury low back/pelvis | M | ±200‡ | Lost balance | Appropriate | Normal | Yes | Landing | No contact | ||||
| 9 | Knee injury/ACL | M | ±130 | Backwards | Appropriate | Normal | Yes | Unsure | No contact | ||||
| 10 | Knee injury/ACL | M | ±160 | Lost balance | Inappropriate | Normal | Unsure | Take-off | No contact | ||||
| 11 | Knee injury/ACL | M | ±125 | Lost balance | Appropriate | High | Unsure | Take-off | No contact | ||||
| 12 | Knee injury/twisted | F | ±30 | Lost balance | Appropriate | Normal | No | Board/board Arms/arms | Active | Yes | Yes | Behind | |
| 13 | Shoulder injury/ligament | M | ±80 | Lost balance | Appropriate | Normal | No | Board/board | Passive | Yes | Yes | In front | |
| Bank turn | |||||||||||||
| 14 | Shoulder injury/AC§§ | M | ±110 | In balance | Appropriate | Board/board | Both | Yes | Yes | Unsure | |||
| 15 | Fracture UE††/forearm | M | ±40 | In balance | Appropriate | Board/board | Passive | Yes | Yes | In front/beside | |||
| 16 | Concussion | F | ±310‡ | Lost balance | Inappropriate | Board/board | Active | Yes | Yes | In front | |||
| 17 | Knee injury/MCL¶¶ | F | ±50 | In balance | Appropriate | Board/board Trunk/trunk Arms/arms | Passive | Yes | Yes | In front | |||
| 18 | Shoulder injury/ligament | M | ±50 | Forward | Inappropriate | Unsure | |||||||
| Rollers | |||||||||||||
| Index frame | Alternative index frame | ||||||||||||
| 19 | Fracture UE††/thumb | M | ±340¶ | Forward | Appropriate | Board/hand | Active | Already lost control | Yes | In front | |||
↵* Sex, male (M), female (F).
↵† Accuracy, mean of the absolute deviations of the initial, individual estimates from the index frame determined in the consensus meeting
↵‡ One outlier relative to consensus.
↵§ Two outliers.
↵¶ Consensus based on three experts.
** Position, position of the rider who caused the contact.
↵†† UE, upper extremity.
↵‡‡ Injury sustained in qualification run (individual run).
↵§§ AC, acromioclavicular joint injury.
↵¶¶ MCL, medial collateral ligament.
ACL, anterior cruciate ligament; SBX, snowboard cross.