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Table 5 Muscle tissue oxygen saturation data pooled over 10 sets of bench press exercise in 19 resistance trained men receiving placebo or supplement in a cross-over design.

From: Comparison of pre-workout nitric oxide stimulating dietary supplements on skeletal muscle oxygen saturation, blood nitrate/nitrite, lipid peroxidation, and upper body exercise performance in resistance trained men

Variable† Baseline Placebo GlycoCarn® SUPP1 SUPP2 SUPP3
StO2 start of exercise (%) 90.9 ± 0.3 91.2 ± 0.3 91.9 ± 0.2 91.1 ± 0.3 91.0 ± 0.3 91.1 ± 0.3
StO2 end of exercise* (%) 47.1 ± 1.0 47.9 ± 1.3 48.6 ± 1.2 42.8 ± 1.5 48.3 ± 1.2 48.9 ± 1.4
StO2 difference* (start-end) 43.8 ± 1.0 43.2 ± 1.3 43.3 ± 1.2 48.3 ± 1.4 42.7 ± 1.1 42.1 ± 1.1
  1. Data are mean ± SEM.
  2. *Condition effect for StO2 end of exercise (p = 0.003); SUPP1 lower than all other conditions.
  3. *Condition effect for StO2 difference (p = 0.003); SUPP1 greater than all other conditions.
  4. No statistically significant difference noted between conditions for StO2 start of exercise (p = 0.12).
  5. † StO2 values monitored continuously during the 10 set exercise protocol. Start values indicate the value prior to beginning each set of exercise. End values indicate the value at the conclusion of each set of exercise. The mean value of the 10 sets for each subject, under each condition, was used in data analysis.