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Subjects
•Three medial compartment knee OA patients (2 women; 65.3±2.3 years)
participated in this study
Dependent Measures
•Knee pain and QOL during daily activities (WOMAC)
•Motor function with 6-minute walk (6MW), timed-up and go (TUG) and stair climb
and descent (SCD) tests
•Peak isokinetic knee extensor and hip abductor torque (Biodex)
•Peak internal knee abduction and extensor moments during
controlled self-selected level-walking.
Training
•Participants completed 6 weeks of elliptical training with three 45 minute
supervised sessions per week.
•The sessions consisted of five 5 minute elliptical exercise bouts: 1) warm-up, 2-4)
sub-maximal with slightly elevated intensity, 5) cool-down
Methods
Effects of elliptical training on pain, motor function, muscle strength and
knee joint kinetics during walking in people with knee osteoarthritis
References
1. Messier, S.P., et al. JAMA, 2013. 310(12): p. 1263-73.
2. Wortley, M., Journal of Sport and Health Science, 2013. In Press.
3. King, L.K., Med Sci Sports Exerc, 2008. 40(8): p. 1376-84.
4. Penedo, F.J. Curr Opin Psychiatry, 2005. 18(2): p. 189-93.
5. Salacinski, A.J., J Orthop Sports Phys Ther, 2012. 42(12): p. 985-95.
Results
Table 1. Functional mobility measures pre and post-training (mean±SD) with effect sizes (ES)
1University of Memphis, Health & Sport Sciences, Memphis, TN;
2University of Tennessee Health Science Center, Physical Therapy,
Memphis, TN; 3East Carolina University, Kinesiology, Greenville, NC
1Max R. Paquette, 2Audrey Zucker-Levin, 3Paul DeVita, 2William Mihalko
•Strength training is effective for improving lower extremity muscle strength,
mobility function and QOL [1,2], but has no positive training effects on gait
biomechanics in knee osteoarthritis (KOA) patients [3].
•Aerobic training (e.g. sub-maximal cycling) directly improves patient QOL [4], but
has little to no effect on muscle strength or gait biomechanics in KOA patients [5].
•Due to the overall success of various exercise programs, we hypothesized that
elliptical training would also reduce pain and improve motor function and QOL
and, improve knee extensor muscle strength in knee OA patients.
•The purpose of this pilot study was to assess the effectiveness of a 6-week
elliptical training intervention on knee pain, QOL, motor function, quadriceps
strength, knee kinetics and gait kinematics in people with knee OA.
Introduction
Contact: mrpqette@memphis.edu
Conclusion
•The findings from this pilot study suggest that elliptical training may be effective
for improving knee pain, QOL, motor function and knee extensor strength in knee
OA patients.
•However, the moderate increase in KAM may suggest larger knee loads following
elliptical training during level-walking.
•These preliminary, beneficial effects of elliptical training support the contention
that larger, randomized clinical trials with this exercise modality are justified.
PRE POST ES Outcome
Speed (m/s) 1.15 ± 0.27 1.09 ± 0.27 0.23 N/A
Step length (m) 0.60 ± 0.09 0.57 ± 0.08 0.37 N/A
WOMAC Pain (/20) 5.67 ± 4.93 2.67 ± 2.52 0.94 Improvement
WOMAC ADLs (/68)
21.0 ± 17.8 11.0 ± 9.6 0.86 Improvement
6MW (m) 388.5 ± 138.4 495.9 ± 59.7 1.23 Improvement
SCD (s) 21.1 ± 14.0 13.0 ± 1.4 1.00 Improvement
TUG (s) 8.1 ± 0.98 7.5 ± 0.5 1.01 Improvement
Figure 1: Peak isokinetic extensor and
abductor torques at 60 °/s (mean±SD) Figure 2: Peak knee abduction and
extension moments during gait (mean±SD)
Gait video
in V3D Elliptical Training
Video