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Table 2 Antioxidant status measured in the peripheral blood of females ingesting ascorbic acid or placebo before exercise

From: Effects of ascorbic acid supplementation on oxidative stress markers in healthy women following a single bout of exercise

Test

Placebo

Ascorbic Acid (1000 mg)

Pre-exercise

Post-exercise

30 min post-exercise

Pre-exercise

Post-exercise

30 min post-exercise

TAS, mM Trolox equivalent

1.27 ± 0.04

1.29 ± 0.02

1.33 ± 0.02

1.28 ± 0.03

1.27 ± 0.02

1.31 ± 0.03

FRAP, μM FeSO4 equivalent

74.0 ± 3.29

77.0 ± 3.54

78.1 ± 3.59

73.5 ± 3.25

77.2 ± 3.15

81.2 ± 3.35 a, p = 0.002

Plasma TBARS, μmol/g protein

0.042 ± 0.003

0.038 ± 0.003

0.044 ± 0.007

0.039 ± 0.004

0.031 ± 0.002 a, 0.048, b, p = 0.046

0.030 ± 0.002 a, p = 0.034, b, p = 0.044

Glutathione peroxidase (GPx), U/g Hb

133 ± 7.1

135 ± 7.6

128 ± 6.8

133 ± 5.3

130 ± 6.4

138 ± 7.3

Superoxide dismutase, U/g Hb

2609 ± 263

3168 ± 461

3450 ± 454a, p = 0.022

2605 ± 375

2726 ± 340

2794 ± 364

Catalase, U/g Hb

90 ± 11.1

90 ± 12.4

90 ± 16.2

94 ± 11.8

91 ± 16.0

92 ± 12.0

  1. The exercise bout was performed indoors on a stationary bicycle for 30 min at intensity corresponding to 65–75% of maximum heart rate. Values are means ± SE; n = 19 per cohort. The p-values indicate the results of a Bonferroni post-hoc analysis. acompared with pre-exercise value (within group); bcompared with the same time point (in between group). TAS, total antioxidant status; FRAP, ferric reducing ability of plasma; TBARS thiobarbituric acid reactive substances; U/g Hb, unit per gram of hemoglobin