Can the grip strength, grip endurance and strength development be improved by a three-month build-up training of the wrist extensors in sport climbers?

Status

Recruiting

Phases

Phase 2

Study type

Interventional

Source

DRKS

Registry ID

DRKS00027238

Enrollment

Registered

2021-12-28

Start date

2022-01-20

Completion date

Unknown

Last updated

2025-04-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Training of the wrist extensors

Interventions

Group 1: Intervention randomized arm with three months of wrist extension training Group 2: non-randomized arm receives no intervention

Eligibility

Sex/Gender

All

Age

16 Years to 45 Years

Inclusion criteria

Inclusion criteria: The following are defined as inclusion criteria: • Age: 16-45 years • More than 5 years of bouldering experience • More than 6 hours of bouldering per week • Degree of climbing according to Fb (Fontainebleau) -Skale / UIAA (Union Internationale des Associations d`Alpinisme): women> 7c + / X; Men> 8a + / XI-

Exclusion criteria

Exclusion criteria: The following are defined as exclusion criteria: • Injuries to the hand or upper extremity within the last 12 months • Taking medication or other medical problems • Exercising other strength-oriented sports • Previous finger or upper extremity surgery

Design outcomes

Primary

Measure	Time frame
The arbitrarily applied grip strength is defined as the primary target parameter. In addition to the grip strength, the maximum strength of the forearm flexors in the boulder-typical "half-crimp" position, strength endurance and strength development are measured. These parameters are recorded at the beginning of the study and as a follow-up after a three-week intervention. The study is considered to have ended when all test subjects have been measured for the second time.	—

Measure

Time frame

The arbitrarily applied grip strength is defined as the primary target parameter. In addition to the grip strength, the maximum strength of the forearm flexors in the boulder-typical "half-crimp" position, strength endurance and strength development are measured. These parameters are recorded at the beginning of the study and as a follow-up after a three-week intervention. The study is considered to have ended when all test subjects have been measured for the second time.

—

Secondary

Measure	Time frame
The mechanical properties of the forearm muscles are defined as secondary target parameters. The mechanical properties on the forearm are measured with the MyotonPRO device from Myoton AS (Lootsa 8A, Tallinn 11415, Estonia). The tissue measurements using MyotonPRO are recognized as a valid and reliable measuring device (Feng, Li, Liu, & Zhang, 2018). The results of (Van Deun, et al., 2018) also show a very high interrater reliability as well as a high reliability in the test-retest ability (Chuang, Wu, & Lin, 2012). The measurements of the mechanical properties take place on the seated test person. The forearm to be measured is placed in front of the body in a comfortable position on the treatment bench. The shoulder joint is located in an anteversion in the glenohumeral joint that is comfortable for the patient. The measuring points are in the area of ??the forearm flexors and extensor muscles. The RR genotype of the ACTN-3 gene is defined as the tertiary target parameter. For the measurement, a saliva sample is taken from the subject's inside of the cheek with the help of a swab. Genotyping takes place in a specialized laboratory using a polymerase chain reaction analysis.	—

Measure

Time frame

The mechanical properties of the forearm muscles are defined as secondary target parameters. The mechanical properties on the forearm are measured with the MyotonPRO device from Myoton AS (Lootsa 8A, Tallinn 11415, Estonia). The tissue measurements using MyotonPRO are recognized as a valid and reliable measuring device (Feng, Li, Liu, & Zhang, 2018). The results of (Van Deun, et al., 2018) also show a very high interrater reliability as well as a high reliability in the test-retest ability (Chuang, Wu, & Lin, 2012). The measurements of the mechanical properties take place on the seated test person. The forearm to be measured is placed in front of the body in a comfortable position on the treatment bench. The shoulder joint is located in an anteversion in the glenohumeral joint that is comfortable for the patient. The measuring points are in the area of ??the forearm flexors and extensor muscles. The RR genotype of the ACTN-3 gene is defined as the tertiary target parameter. For the measurement, a saliva sample is taken from the subject's inside of the cheek with the help of a swab. Genotyping takes place in a specialized laboratory using a polymerase chain reaction analysis.

—

Countries

Germany

Contacts

Public ContactStephan Pohl

Praxis für Physiotherapie Pohl

pohlstephan@icloud.com015259633957

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Feb 4, 2026