@article{heller_perception_2016, title = {Perception of {Muscular} {Effort} {During} {Dynamic} {Elbow} {Extension} in {Multiple} {Sclerosis}}, volume = {97}, issn = {1532-821X}, doi = {10/f785d4}, abstract = {OBJECTIVE: To investigate the perception of muscular effort in individuals with multiple sclerosis (MS) and healthy controls during dynamic contractions. DESIGN: Case-control study. SETTING: MS day care center. PARTICIPANTS: Individuals with MS (n=28) and controls (n=28) (N=56). INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Perceived muscular effort during dynamic elbow extensions was rated at 9 different weight intensities (10\%-90\% of 1-repetition maximum) in a single-blind, randomized order using the OMNI-Resistance Exercise Scale. Muscle activity of the triceps brachii muscle (lateral head) was measured via surface electromyography and normalized to maximal voluntary excitation. RESULTS: According to OMNI-level ratings, significant main effects were found for the diagnostic condition (F=27.33, P{\textless}.001, η(2)=.11), indicating 0.7 (95\% confidence interval [CI], 0.3-1.1) lower mean OMNI-level ratings for MS, and for the intensity level (F=46.81, P{\textless}.001, η(2)=.46), showing increased OMNI-level ratings for increased intensity levels for both groups. Furthermore, significant main effects were found for the diagnostic condition (F=16.52, P{\textless}.001, η(2)=.07), indicating 7.1\% (95\% CI, -8.6 to 22.8) higher maximal voluntary excitation values for MS, and for the intensity level (F=33.09, P{\textless}.001, η(2)=.36), showing higher relative muscle activities for increasing intensity levels in both groups. CONCLUSIONS: Similar to controls, individuals with MS were able to differentiate between different intensities of weight during dynamic elbow extensions when provided in a single-blind, randomized order. Therefore, perceived muscular effort might be considered to control resistance training intensities in individuals with MS. However, training intensity for individuals with MS should be chosen at approximately 1 OMNI level lower than recommended, at least for dynamic elbow extension exercises.}, language = {eng}, number = {2}, journal = {Archives of Physical Medicine and Rehabilitation}, author = {Heller, Mario and Retzl, Irene and Kiselka, Anita and Greisberger, Andrea}, month = feb, year = {2016}, pmid = {26525526}, keywords = {Center for Digital Health Innovation, Forschungsgruppe Digital Technologies, Studiengang Physiotherapie, best, best-lbheller}, pages = {252--258}, }