Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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RECRUITING
NA
40 participants
INTERVENTIONAL
2025-11-05
2026-11-30
Brief Summary
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Detailed Description
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Despite its relevance, the correlation between grip strength and actual game performance in elite hockey players has not been systematically studied. This project addresses two primary research questions: (1) Does grip strength correlate with performance in professional hockey players? and (2) Does improved grip strength result in measurable performance improvements?
The study will be conducted in two phases. In Phase 1, we will recruit approximately 40 professional male and female hockey players from the Swedish Hockey League (SHL), Swedish Women's Hockey League (SDHL), and HockeyAllsvenskan. Each participant will undergo grip strength testing using the standardized HAKIR protocol with a Jamar dynamometer. Three alternating trials per hand will be recorded, and the average grip strength (in kilograms) will be calculated. Simultaneously, player performance will be assessed based on three key metrics:
Game Score: A composite metric capturing offensive and defensive contributions, adjusted for even-strength playing time (adapted from existing SHL models).
Shots on Goal: Total number of shots per game.
Shooting Precision: Ratio of goals to total shots taken.
Injuries sustained during the season
Each of these metrics will be collected for the five games preceding and following grip strength measurement. Statistical analyses will include Pearson correlation, t-tests, chi-square tests, and non-parametric alternatives where appropriate. Estimates will be presented with 95% confidence intervals, and p-values \< 0.05 will be considered statistically significant. As a pilot study, no formal power calculation will be performed initially, but variance estimates will be used to plan a larger future trial.
Additionally, injuries sustained during the study period will be recorded and monitored as an outcome measure. We will investigate whether there is any correlation between grip strength and injury incidence to assess if stronger grip strength may influence injury risk or resilience in professional hockey players.
In Phase 2, participants will engage in a standardized grip-strength training program over a defined period (see Appendix D). Post-intervention grip strength and performance metrics will be reassessed using the same methods to determine whether an increase in grip strength is associated with performance improvement.
Inclusion criteria include:
Active rostered player in SHL, SDHL, or HockeyAllsvenskan
No current hand or wrist injury
Exclusion criteria:
Not currently signed in the aforementioned leagues
Current injury to the hand or wrist that impairs testing
This project addresses a notable knowledge gap in elite performance research. If grip strength is shown to correlate with or enhance performance, it could be used as a proxy marker in sports performance evaluations and as a justification for implementing targeted grip-strength training in professional hockey conditioning programs. The findings may contribute to improved training strategies, rehabilitation protocols, and performance monitoring in elite ice hockey.
Conditions
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Study Design
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NA
SINGLE_GROUP
The training program includes specific exercises targeting the forearm flexors and extensors, wrist stability, and hand grip endurance. Typical exercises may involve hand grippers, wrist rollers, towel wringing, plate pinches, and resisted squeezing movements using elastic bands or putty. Training frequency, intensity, duration, and progression will be standardized and supervised to ensure consistency across participants.
After completion of the training period, grip strength will be re-measured using the same HAKIR protocol and dynamometer. Performance metrics-game score, shots on goal, and shooting precision-will also be collected for the five games following
OTHER
NONE
Study Groups
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Grip Strength Training
In the second phase of the study, a standardized grip strength training program will be implemented as the primary intervention. This program is designed to improve grip strength in professional hockey players over a defined period (details in Appendix D). All participants who completed Phase 1 will undergo this intervention.
The training program includes specific exercises targeting the forearm flexors and extensors, wrist stability, and hand grip endurance. Typical exercises may involve hand grippers, wrist rollers, towel wringing, plate pinches, and resisted squeezing movements using elastic bands or putty. Training frequency, intensity, duration, and progression will be standardized and supervised to ensure consistency across participants.
After completion of the training period, grip strength will be re-measured using the same HAKIR protocol and dynamometer. Performance metrics-game score, shots on goal, and shooting precision-will also be collected for the five games following
Training following a predefined protocol.
Training following a predefined protocol.
Interventions
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Training following a predefined protocol.
Training following a predefined protocol.
Eligibility Criteria
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Inclusion Criteria
* No current hand injury
Exclusion Criteria
* Current hand injury
18 Years
ALL
No
Sponsors
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Dalarna County Council, Sweden
OTHER
Responsible Party
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Daniel Muder
MD, PhD
Principal Investigators
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Daniel Muder, MD, PhD
Role: PRINCIPAL_INVESTIGATOR
Centre for Clinical Research Dalarna, Uppsala University, Sweden
Locations
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Leksands IF
Leksand, Region Dalarna, Sweden
Countries
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Central Contacts
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Facility Contacts
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Daniel Muder, Principal Investigator, PhD
Role: primary
References
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Jiang R, Westwater ML, Noble S, Rosenblatt M, Dai W, Qi S, Sui J, Calhoun VD, Scheinost D. Associations between grip strength, brain structure, and mental health in > 40,000 participants from the UK Biobank. BMC Med. 2022 Sep 9;20(1):286. doi: 10.1186/s12916-022-02490-2.
Toong T, Wilson KE, Urban K, Paniccia M, Hunt AW, Keightley M, Reed N. Grip Strength in Youth Ice Hockey Players: Normative Values and Predictors of Performance. J Strength Cond Res. 2018 Dec;32(12):3494-3502. doi: 10.1519/JSC.0000000000002815.
Tavares Junior AC, Silva HS, Penedo T, do Amaral Rocha LGS, da Silva AS, Venditti Junior R, Dos-Santos JW. Correlation of the Handgrip Strength and Body Composition Parameters in Young Judokas. Int J Environ Res Public Health. 2023 Feb 2;20(3):2707. doi: 10.3390/ijerph20032707.
Trivic T, Eliseev S, Tabakov S, Raonic V, Casals C, Jahic D, Jaksic D, Drid P. Somatotypes and hand-grip strength analysis of elite cadet sambo athletes. Medicine (Baltimore). 2020 Jan;99(3):e18819. doi: 10.1097/MD.0000000000018819.
Roberts HC, Denison HJ, Martin HJ, Patel HP, Syddall H, Cooper C, Sayer AA. A review of the measurement of grip strength in clinical and epidemiological studies: towards a standardised approach. Age Ageing. 2011 Jul;40(4):423-9. doi: 10.1093/ageing/afr051. Epub 2011 May 30.
Ewing Fess, E. Clinical Assessment Recommendations. Michigan: In Casanova, J. S. (Ed.),American Society of Hand Therapists.; pp. 41-45). (2d edition; vol. 1992).
Related Links
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Introduction to game score.
Information on game score.
Other Identifiers
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2024-08560-01
Identifier Type: -
Identifier Source: org_study_id
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