H.S., B.B., A.S. (Alireza Shamsoddini), A.S. (Ayoub Saeidi), I.L. and H.Z. participated in the conception and design of the study. H.S., A.S. (Ayoub Saeidi) and B.B. were responsible for testing. T.A.V., K.A.E., A.S. (Ayoub Saeidi), S.M.T. and I.L., were responsible for data collection and statistical analysis. A.S. (Ayoub Saeidi), I.L., H.Z., K.W. and B.K. were responsible for writing and finalization of the manuscript. All authors have read and agreed to the published version of the manuscript.

Figure 1. ACRT test steps.

Figure 1. ACRT test steps.

Figure 2. Mean ± standard deviations (SD) of plasma CK levels before and at different times after consuming oregano supplements. The asterisk (*) indicates significant time × group interaction, (#) indicates a significant difference between the two groups, and (&) indicates the main effect of time (p < 0.05).

Figure 2. Mean ± standard deviations (SD) of plasma CK levels before and at different times after consuming oregano supplements. The asterisk (*) indicates significant time × group interaction, (#) indicates a significant difference between the two groups, and (&) indicates the main effect of time (p < 0.05).

Figure 3. Mean ± standard deviations (SD) of plasma LDH levels before and at different times after consuming oregano supplements. The asterisk (*) indicates significant time × group interaction, (#) indicates significant difference between the two groups, and (&) indicates the main effect of time (p < 0.05).

Figure 3. Mean ± standard deviations (SD) of plasma LDH levels before and at different times after consuming oregano supplements. The asterisk (*) indicates significant time × group interaction, (#) indicates significant difference between the two groups, and (&) indicates the main effect of time (p < 0.05).

Figure 4. Mean ± standard deviations (SD) of plasma MDA levels before and at different times after consuming oregano supplements. The asterisk (*) indicates significant time × group interaction, (#) indicates a significant difference between the two groups, and (&) indicates the main effect of time (p < 0.05).

Figure 4. Mean ± standard deviations (SD) of plasma MDA levels before and at different times after consuming oregano supplements. The asterisk (*) indicates significant time × group interaction, (#) indicates a significant difference between the two groups, and (&) indicates the main effect of time (p < 0.05).

Figure 5. Mean ± standard deviations (SD) of plasma GPX levels before and at different times after consuming oregano supplements. The asterisk (*) indicates significant time × group interaction, (#) indicates a significant difference between the two groups, and (&) indicates significant main effect of time (p < 0.05).

Figure 5. Mean ± standard deviations (SD) of plasma GPX levels before and at different times after consuming oregano supplements. The asterisk (*) indicates significant time × group interaction, (#) indicates a significant difference between the two groups, and (&) indicates significant main effect of time (p < 0.05).

Figure 6. Mean ± standard deviations (SD) of plasma TAC levels before and at different times after consuming oregano supplements. The asterisk (*) indicates significant time × group interaction, (#) indicates a significant difference between the two groups, and (&) indicates the main effect of time (p < 0.05).

Figure 6. Mean ± standard deviations (SD) of plasma TAC levels before and at different times after consuming oregano supplements. The asterisk (*) indicates significant time × group interaction, (#) indicates a significant difference between the two groups, and (&) indicates the main effect of time (p < 0.05).

Figure 7. Mean ± standard deviations (SD) of plasma SOD levels before and at different times after consuming oregano supplements. The asterisk (*) indicates significant time × group interaction, (#) indicates a significant difference between the two groups, and (&) indicates the main effect of time (p < 0.05).

Figure 7. Mean ± standard deviations (SD) of plasma SOD levels before and at different times after consuming oregano supplements. The asterisk (*) indicates significant time × group interaction, (#) indicates a significant difference between the two groups, and (&) indicates the main effect of time (p < 0.05).

Table 1. Oregano components.

Table 1. Oregano components.

Component #Oregano ComponentsSub-Peak Area (%)1Carvacrol36.12Thymol27.83p-Cymene12.14γ-Terpinene6.85Methyl carvacrol4.86β-Pinene3.27α-Terpinene1.88Terpinen-4-ol1.29α-Thujene1.210Myrcene0.9

Table 2. Analysis of nutrient supplements (mean ± SD).

Table 2. Analysis of nutrient supplements (mean ± SD).

PlaceboOreganop-ValueTotal (kcal/d)2225 ± 1902203 ± 1570.43Total protein (g)/d111 ± 16112 ± 140.67Protein (g/kg BW)/d1.05 ± 0.451.1 ± 0.40.58Total protein (% energy)18.3 ± 4.118.4 ± 4.20.86Total CHO (g)/d295 ± 19285 ± 200.28Total CHO (% energy)48.5 ± 6.947.4 ± 7.20.39Total fat (g)/d81.5 ± 2183.5 ± 230.71Total fat (% energy)31.9 ± 7.632.5 ± 6.90.49