Abstract #4019
PCr recovery rates of gastrocnemius medialis and soleus muscles at various exercise levels
Georg B Fiedler 1,2 , Albrecht Ingo Schmid 1,2 , Sigrun Goluch 1,2 , Elmar Laistler 1,2 , Kiril Schewzow 1,2 , Michael Wolzt 3 , Ewald Moser 1,2 , and Martin Meyerspeer 1,2
1
MR Centre of Excellence, Medical University
of Vienna, Vienna, Vienna, Austria,
2
Center
for Medical Physics and Biomedical Engineering, Medical
University of Vienna, Vienna, Vienna, Austria,
3
Department
of Clinical Pharmacology, Medical University of Vienna,
Vienna, Vienna, Austria
Kinetics of phosphorus metabolites in human soleus (SOL)
and gastrocnemius medialis (GM) muscles were measured
during and after plantar flexion exercise bouts with
varying workloads, using single-shot localized MRS
(semi-LASER) at high time resolution with a custom
multichannel 1H/31P coil at 7T. PCr recovery time τ was
successfully quantified in GM and in SOL. In GM, τ
showed positive correlation with exercise intensity and
GM PCr depletion. In SOL, these correlations were not
found, e.g. some datapoints with strong depletion in SOL
even showed a τ of only 20s. pH in GM was also
correlated to PCr depletion.
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