Effect of L-arginine on muscle metabolism during rest and different exercise regimens in MELAS subjects as measured by ³¹P-MRS (mean ± SD).

Key: AnPwr = anaerobic power; ATP = adenosine triphosphate; ATPAn = ATP anaerobic; ATPOx = ATP oxidative ATPtot = ATP total; HEP = high energy phosphates; [Mg2+] = intracellular magnesium pMg = free or paracellular magnesium and is calculated by the formula—log10[Mg2+] Pi = inorganic phosphate; Pi/PCr ratio = ADP ratio; PCr = phosphocreatine PCrRec 1/2 = halftime of phosphocreatine recovery in seconds; RPM = rotations per minute; SD = standard deviation P is two-tailed P-value from paired t-test * statistically significant result Effect of L-arginine on muscle metabolism during rest and different exercise regimens in MELAS subjects as measured by 31P-MRS (mean ± SD).