title: Mechanomyographic responses during recruitment curves in the soleus muscle.
abstract: In this study we examined relationships among mechanomyographic (MMG), electromyographic (EMG), and peak twitch torque (PTT) responses as well as test-retest reliability when recorded during recruitment curves in the soleus muscle.
  
  
  
  PTT, EMG (M-wave, H-reflex), and MMG responses were recorded during recruitment curves in 16 subjects (age 24 ± 2 years) on 2 separate days. The sum of the M-wave and H-reflex (M+H) was calculated. Correlations among variables and test-retest reliability were determined.
  
  
  
  MMG was correlated with PTT (mean r = 0.93, range r = 0.59-0.99), the M-wave (0.95, 0.04-0.98), and M+H (0.91, 0.42-0.97), but was unrelated to the H-reflex (-0.06, -0.56 to 0.47). Reliability was consistently high among most variables, but normalizing to the maximum value improved MMG reliability and the minimum detectable change.
  
  
  
  MMG responses predicted 86%-90% of the variability in PTT, M-wave, and M+H; thus, MMG may be a useful alternative for estimating twitch torque and maximal activation. Muscle Nerve 56: 107-116, 2017.
authors.affiliation: Department of Nutrition and Health Science, University of Nebraska, 211 Ruth Leverton Hall, Lincoln, Nebraska, 68583-0806, USA.
authors.forename: Amelia A
authors.initials: AA
authors.lastname: Miramonti
authors.affiliation: Department of Health and Human Performance, Oklahoma State University, Stillwater, Oklahoma, USA.
authors.forename: Nathaniel D M
authors.initials: NDM
authors.lastname: Jenkins
authors.affiliation: Department of Physical Therapy, University of the Pacific, Stockton, California, USA.
authors.forename: Preeti D
authors.initials: PD
authors.lastname: Oza
authors.affiliation: Department of Health, Sport, and Exercise Sciences, University of Kansas, Lawrence, Kansas, USA.
authors.forename: Joseph P
authors.initials: JP
authors.lastname: Weir
authors.affiliation: Department of Nutrition and Health Science, University of Nebraska, 211 Ruth Leverton Hall, Lincoln, Nebraska, 68583-0806, USA.
authors.forename: Joel T
authors.initials: JT
authors.lastname: Cramer
mesh_terms: D000200:Action Potentials / Q000502:physiology; D000328:Adult; D000704:Analysis of Variance; D004576:Electromyography; D005260:Female; D006181:H-Reflex / Q000502:physiology*; D006801:Humans; D008297:Male; D009119:Muscle Contraction / Q000502:physiology*; D018482:Muscle, Skeletal / Q000502:physiology*; D010812:Physical Stimulation; D011601:Psychophysics; D019415:Torque; D055815:Young Adult
keywords: compound muscle action potential; electrical stimulation; electromyography; mechanomyography; reliability