Exploring the effect of repeated-day familiarization on the ability to generate reliable maximum voluntary muscle activation

Muscle adaptations following 21 consecutive days of strength test familiarization compared with traditional training

“…Contrary to our hypothesis, no improvements were observed in MVC strength. This expounds on previous research demonstrating that neither repeated MVC testing nor isotonic training improved MVC strength. Thus, it seems unlikely that trained individuals can increase MVC strength to a measurable degree given that our study likely employed the most effective stimulus for increasing MVC strength (i.e., the test itself) and was unsuccessful.…”

“…Other studies performed in untrained individuals, however, found that performing the elbow flexion MVC test once per week over 3 or 6 weeks did not increase MVC strength. When assessing trained individuals, no increases in elbow flexion MVC strength were demonstrated upon completing 1, 2, or 4 practice testing sessions held within the same week. Thus, unlike repeated elbow flexion 1RM testing, it would appear that repeated practice of the elbow flexion MVC test may not improve MVC strength in trained individuals, although it is possible that a greater quantity and frequency of testing sessions may be required …”

Differences in muscle activity patterns and graphical product quality in children copying and tracing activities on horizontal or vertical surfaces

“…Data were acquired and analyzed using custom code (LabView V12, National Instruments, Austin, TX, USA). In order to permit amplitude normalization of sEMG data, the subjects performed several maximum isometric voluntary contractions (MVCs) for five seconds for each of the monitored muscles (Burden, 2010;Frost et al, 2012). Recording was initiated following explanation and practice by the subject.…”

Effects of Lumbosacral Manipulation on Isokinetic Strength of the Knee Extensors and Flexors in Healthy Subjects: A Randomized, Controlled, Single-Blind Crossover Trial

“…It has been suggested that the lowest amount of intersession variability attainable during repeated MVC/MVICs is a coefficient of variation range of 5% to 10%, 35,36 and a standard error of the mean of 5%. 37 Although the overall magnitude of the changes in strength post-lumbosacral manipulation was not large enough to overcome this variability, statistically significant changes in measurements of CNS processing have been reported in previous investigations of the physiological effects of SM. 28,38 These studies incorporated techniques such as EMG, transcranial magnetic stimulation, and the Hoffmann reflex.…”