Biomedical subjects

I Fiebert

Publications and source records attributed to I Fiebert.

2 recordsLinked to original sources

PubMed1994

Are "passive" extension exercises really passive?

When rehabilitating patients with back dysfunction, extension exercises that are presumably "passive" for the erector spinae muscles are frequently used. The purpose of this study was to record electromyographic (EMG) activity from back extensor muscles to determine if these muscles are truly inactive during these maneuvers. Surface EMG was recorded bilaterally from lower lumbar muscles in 62 pain-free subjects. The root-mean-square EMG activity, recorded in microV, for the four positions tested was (mean +/- SD): lying prone (1.268 +/- 0.902), extension in lying prone (6.713 +/- 6.976), standing neutral (4.760 +/- 3.282), and extension in standing (3.558 +/- 2.273). One-way ANOVA for repeated measures and Tukey's post hoc test were used to analyze the data. The results indicated that EMG activity was greatest for extension in lying prone (p < .05), equivalent between the two standing positions (p > .05), and least when lying prone (p < .05). The results of this study demonstrated that "passive" extension exercises were not truly passive for lumbar back extensor muscles. From a clinical perspective, if the performance of passive back extension is important, extension in lying prone may not be the exercise of choice and having patients lying prone may be the most beneficial.

Adult↗

PubMed1994

Comparative measurements of anterior tibial translation using the KT-1000 knee arthrometer with the leg in neutral, internal rotation, and external rotation.

Position of the leg while using the KT-1000 knee arthrometer may be an important variable in attaining accurate and reliable measurements. The purpose of this study was to compare the anterior translation of the tibia on the femur with the tibia in neutral, internal rotation (IR), and external rotation (ER). Additionally, data were analyzed to determine the intratester and intertester reliability of the KT-1000 knee arthrometer with the leg in neutral. Data were collected from 50 subjects by two testers and one recorder, according to MEDmetric protocol. Tester 1 performed three pulls or one sequence in neutral, IR, and ER. A second sequence was performed in neutral. Tester 2 performed two sequences in the neutral position. Data in each sequence were averaged and evaluated. Intertester reliability was calculated at r = .64 (poor), while intratester reliability for tester 1 was r = .90 (high) and for tester 2 was r = .86 (good). A repeated measure, one-way ANOVA was used, and results demonstrated a statistical difference of p < .0001, with the difference found between IR when compared with ER and neutral. In conclusion, differences in tibial translation occurred between neutral, IR, and ER of the lower extremity. This may prove valuable for clinicians using the KT-1000.

Adult↗