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Free Fall Acrobatics to Reduce Neck Loads During Parachute Opening Shock: Evaluation of an Intervention. (ACROPOSE)
This study is enrolling participants by invitation only.
Sponsor:
Karolinska Institutet
Information provided by (Responsible Party):
Anton Westman, Karolinska Institutet
ClinicalTrials.gov Identifier:
NCT02625896
First received: December 7, 2015
Last updated: June 26, 2017
Last verified: June 2017
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Purpose
This study aims to evaluate the use of an aerial human body manoeuvre to reduce the biomechanical load on the neck of a parachutist during the parachute opening, in order to create a basis for future prevention of skydiver neck pain in the parachutist population.
| Condition | Intervention |
|---|---|
| Pain Athletic Injuries Whiplash Injuries Biomechanical Lesion, Unspecified | Behavioral: Intervention |
| Study Type: | Interventional |
| Study Design: | Allocation: Randomized Intervention Model: Crossover Assignment Masking: No masking Primary Purpose: Prevention |
| Official Title: | Free Fall Acrobatics to Reduce Neck Loads During Parachute Opening Shock: Evaluation of an Intervention. |
Resource links provided by NLM:
Further study details as provided by Anton Westman, Karolinska Institutet:
Primary Outcome Measures:
- Magnitudes of decelerations [ Time Frame: 10 seconds ]Multidirectional accelerations during ram-air parachute openings expressed in terms of multiples of Earth's gravitational acceleration g using the dimensionless ratio G.
- Magnitudes of jerks [ Time Frame: 10 seconds ]Multidirectional rates of changes of accelerations during ram-air parachute openings expressed in G per second.
| Estimated Enrollment: | 20 |
| Actual Study Start Date: | June 17, 2017 |
| Estimated Study Completion Date: | August 2018 |
| Estimated Primary Completion Date: | December 2017 (Final data collection date for primary outcome measure) |
| Arms | Assigned Interventions |
|---|---|
|
Experimental: Intervention
A sequence of free fall manoeuvres performed using the human body: A free fall velocity reduction prior to main parachute deployment followed by a head high body attitude prior to main parachute extraction.
|
Behavioral: Intervention
Standard skydive from 4 000 m above mean sea level (AMSL) following standard safety recommendations and procedures including, if necessary, standard reserve parachute activation procedures. If necessary for safety, participants are asked to immediately leave the study at will. At 1 500 m AMSL, the participant is asked to begin to slow down the fall rate by increasing the body surface area to the relative wind. At no lower than 1 200 m AMSL, the participant is asked to deploy the main parachute. At main parachute deployment, while maintaining a stable body position with shoulders level to the horizon and unaltered heading, the participant is asked to increase the pitch angle of the long body axis attitude, raising the head, shoulders, and upper body up from the flat belly-to-relative-wind plane to a head-high body position, using any free fall technique the participant is comfortable with - as long as there is NO RISK for an unintentional backflip.
|
|
No Intervention: Control
Normal main parachute extraction performed in a manner that is typical for the study participant.
|
Show Detailed Description
Eligibility| Ages Eligible for Study: | 18 Years to 60 Years (Adult) |
| Sexes Eligible for Study: | All |
| Accepts Healthy Volunteers: | Yes |
Criteria
Inclusion Criteria:
- Holders of the highest parachute certification (level D) in the Swedish Parachute Association
Exclusion Criteria:
- Ongoing neck problems
- Pregnancy
- Unwillingness to follow the safety regulations of the study
- Known patch allergy
- Participation in another concurrent biomedical study
Contacts and Locations
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Please refer to this study by its ClinicalTrials.gov identifier: NCT02625896
Please refer to this study by its ClinicalTrials.gov identifier: NCT02625896
Locations
| Sweden | |
| Karolinska Institutet | |
| Stockholm, Sweden, 14183 | |
Sponsors and Collaborators
Karolinska Institutet
Investigators
| Principal Investigator: | Anton Westman, MD PhD | Karolinska Institutet |
More Information
Additional Information:
Publications:
Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
| Responsible Party: | Anton Westman, MD PhD, Karolinska Institutet |
| ClinicalTrials.gov Identifier: | NCT02625896 History of Changes |
| Other Study ID Numbers: |
CIF FO2015-0005. CIF D2014-0021 ( Other Identifier: The Swedish National Centre for Research in Sports (CIF) ) |
| Study First Received: | December 7, 2015 |
| Last Updated: | June 26, 2017 |
| Studies a U.S. FDA-regulated Drug Product: | No | |
| Studies a U.S. FDA-regulated Device Product: | No | |
Keywords provided by Anton Westman, Karolinska Institutet:
|
Aviation Parachuting |
Additional relevant MeSH terms:
|
Wounds and Injuries Whiplash Injuries Athletic Injuries Neck Injuries |
ClinicalTrials.gov processed this record on July 14, 2017