Healthy
Conditions
Keywords
archery, muscle fatigue, recovery, manipulation
Brief summary
The aim of this study is to: (i) characterize the effect of repeated archery shots on the EMG parameters of certain selected upper limb muscles; and (ii) evaluate how manipulation of the initial two-second tension phase, in particular involving muscle stretching, affects these EMG parameters after repeated shots.
Detailed description
EMG measurements will be collected for selected muscles in the shoulder joint and forearm, at points: initially at the beginning, after the athletes have performed 50 and another 50 archery shots, and finally after undergoing manual therapy. The main phase of muscle testing will take place in the Aiming phase.
Interventions
OTHERManual therapy
This technique involves a low-amplitude, high-velocity push on the shoulder and elbow joints with an additional two-second tension
OTHERPlacebo
Performing manipulations without a two-second preliminary tension of the joint capsule in the shoulder and elbow joints.
Sponsors
Medical University of Gdansk
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
PREVENTION
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
* Actively training as an archer at least twice a week for six months; * In good health, with no recent injury or illness; * Over 18 years of age; * Engagement in all phases of the study.
Exclusion criteria
* Any injury or illness present at the time of the study; * Recent history (within six months) of upper extremity injury (shoulder, elbow, or wrist), joint pain, lower extremity joint hypermobility, or neurological/connective tissue disease. * No training participation * No consent for study
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Assessment of MVC. | Each isometric muscle test lasts 3 seconds. The study is performed three times for each muscle. | Muscle EMG is an assessment of the electrical characteristics during the study, the electrical source of which is the muscle membrane potential, and the measured EMG potentials are measured in μV and the repetition rate of muscle motor unit firing measured in Hz, at the same time of the study. |
| Muscle stiffness | Each Myoton application lasts 1 sec for one point. Three evaluations of one of the two points for one muscle are performed. It is assumed that the study with recording will last 30 seconds for one muscle. | Muscle stiffness - characteristic resistance to physical contraction, which deforms initially forming. Stiffness (N/m) was calculated as S = amax.mprobe/Δl. |
Contacts
Primary ContactRafał Studnicki, PhD
Outcome results
None listed