title: Whole-body vibration strengthening compared to traditional strengthening during physical therapy in individuals with total knee arthroplasty.
abstract: This study investigated the use of whole-body vibration (WBV) as an alternative strengthening regimen in the rehabilitation of individuals with total knee arthroplasty (TKA) compared with traditional progressive resistance exercise (TPRE). Individuals post TKA (WBV n = 8; TPRE n = 8) received physical therapy with WBV or with TPRE for 4 weeks. Primary dependent variables were knee extensor strength, quadriceps muscle activation, mobility, pain, and range of motion (ROM). There was a significant increase in knee extensor strength and improvements in mobility, as measured by maximal volitional isometric contraction and the Timed Up and Go Test (TUG), respectively, for both groups (p < 0.01). The WBV knee extensor strength improved 84.3% while TPRE increased 77.3%. TUG scores improved 31% in the WBV group and 32% for the TPRE group. There were no significant differences between groups for strength or muscle activation (Hotelling's T(2) = 0.42, p = 0.80) or for mobility (F = 0.54; p = 0.66). No adverse side effects were reported in either group. In individuals with TKA, both WBV and TPRE showed improved strength and function. Influence of WBV on muscle activation remains unclear, as muscle activation levels were near normal for both groups.
authors.affiliation: Department of Exercise Sciences, Brigham Young University, Provo, Utah 84602, USA. Wayne_johnson@byu.edu
authors.forename: A Wayne
authors.initials: AW
authors.lastname: Johnson
authors.forename: J William
authors.initials: JW
authors.lastname: Myrer
authors.forename: Iain
authors.initials: I
authors.lastname: Hunter
authors.forename: J Brent
authors.initials: JB
authors.lastname: Feland
authors.forename: J Ty
authors.initials: JT
authors.lastname: Hopkins
authors.forename: David O
authors.initials: DO
authors.lastname: Draper
authors.forename: Dennis
authors.initials: D
authors.lastname: Eggett
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000534:rehabilitation*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D053580:Muscle Strength; D020127:Recovery of Function; D055070:Resistance Training; D014732:Vibration / Q000627:therapeutic use*