Abstract：
BACKGROUND:Handheld dynamometers (HHD) provide quick and low-cost assessments of muscle strength and their use has been increasing in clinical practice. There is no available data related to the validity of HHD for this measurement. OBJECTIVE:To verify the concurrent validity of scapular protraction measurements using an HHD. METHODS:Individuals with traumatic anterior glenohumeral instability were allocated in Instability Group (n=20), healthy swimmers were allocated in Athletes Group (n=19) and healthy subjects were allocated in Sedentary Group (n=21). Concurrent validity was verified by the Pearson correlation test between HHD and isokinetic measurements. The agreement between instruments was verified by Bland-Altman plots, for each of the two HHD positions. RESULTS:A moderate correlation was observed between seated (r=0.59) and lying supine HHD (r=0.54) and isokinetic dynamometer measurements for the all groups. Separated group analysis exhibited a strong correlation between seated HHD and isokinetic dynamometer measurements in the Instability Group (r=0.80), Sedentary Group (r=0.79) and Athletes Group (r=0.76). The Bland-Altman plot showed greater agreement in the seated position than the lying supine position when comparing measurements with the HHD and isokinetic in both the general sample and separated groups. CONCLUSION:The HHD may be considered a valid tool for assessing scapular protraction muscle strength among healthy athletes, non-athletes and subjects with shoulder instability. We recommend to assess subjects in the seated position and to be aware that the HHD tends to overestimate the peak force, compared with the gold-standard isokinetic dynamometer.
journal_name
Braz J Phys Therjournal_title
Brazilian journal of physical therapyauthors
Liberatori Junior RM,Netto WA,Carvalho GF,Zanca GG,Zatiti SCA,Mattiello SMdoi
10.1016/j.bjpt.2018.08.002subject
Has Abstractpub_date
2019-01-01 00:00:00pages
228-235issue
3eissn
1413-3555issn
1809-9246pii
S1413-3555(17)30586-5journal_volume
23pub_type
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