Table 5.
Markers of Muscle Catabolism, Secondary Muscle Damage, and Physiological Stress
Variable | Group | Baseline | Pre-Lift | 60-min Post | 24-hr Post | 48-hr Post | Group Mean | p-value (GG) | p-value (WSC) |
---|---|---|---|---|---|---|---|---|---|
AST (U/L) | P | 31.85±9.65 | 27.47±6.40 | 30.79±7.88 | 41.39±13.31 | 37.67±10.33 | 33.83±2.19 | G=0.919 | |
TC | 37.70±17.65 | 28.39±7.62 | 29.53±6.46 | 40.59±17.59 | 31.32±11.57 | 33.51±2.29 | T=0.003* | T q =0.759 | |
Time Mean | 34.78±2.93 | 27.93±1.46† | 30.16±1.51Ψ | 40.99±3.23Ψ◊ | 34.50±2.28Ψ# | G X T=0.316 | G X T L =0.162 | ||
ALT (U/L) | P | 33.81±18.74 | 32.21±12.26 | 34.19±13.60 | 36.78±14.97 | 35.80±13.84 | 34.56±4.19 | G=0.455 | |
TC | 31.78±13.22 | 30.01±19.33 | 28.32±15.83 | 31.08±19.58 | 28.54±17.41 | 29.94±4.38 | T=0.529 | T L =0.180 | |
Time Mean | 32.79±3.41 | 31.11±3.34 | 31.26±3.07 | 33.93±3.61Ψ◊ | 32.17±3.27 | G X T=0.521 | G X T L =0.266 | ||
Total Billirubin (umol/L) | P | 8.00±3.67 | 7.25±3.47 | 9.08±5.31 | 8.14±3.82 | 7.35±3.21 | 7.96±1.01 | G=0.395 | |
TC | 9.65±3.85 | 9.98±4.95 | 9.58±4.01 | 9.79±5.20 | 7.19±3.21 | 9.24±1.06 | T=0.064§ | T q =0.026* | |
Time Mean | 8.83±0.78 | 8.61±0.89 | 9.33±0.99 | 8.97±0.95 | 7.27±0.67†Ψ◊# | G X T=0.306 | G X T L =0.125 | ||
Urea/BUN (mmol/L) | P | 6.59±1.54 | 6.16±1.74 | 6.07±1.59 | 6.48±1.96 | 5.92±2.33 | 6.24±0.44 | G=0.794 | |
TC | 6.49±1.39 | 6.75±1.30 | 6.40±1.33 | 6.59±1.83 | 5.83±1.66 | 6.41±0.46 | T=0.061§ | T L =0.055§ | |
Time Mean | 6.54±0.31 | 6.46±0.32 | 6.24±0.31 | 6.53±0.40 | 5.88±0.43†Ψ# | G X T=0.594 | G X T q =0.238 | ||
Creatinine (umol/L) | P | 96.50±13.23 | 97.19±19.28 | 102.76±17.25^ | 98.91±21.16^ | 95.20±17.73^◊ | 98.11±4.05 | G=0.273 | |
TC | 91.82±11.99 | 96.84±15.27 | 95.42±14.37 | 91.52±11.27 | 81.99±14.87†Ψ◊# | 91.52±4.23 | T=0.004* | T q =0.003* | |
Time Mean | 94.16±2.64 | 97.02±3.65 | 99.09±3.33 | 95.21±3.58 | 88.60±3.43†Ψ◊# | G X T=0.178 | G X T L =0.030* | ||
BUN/Creatinine Ratio | P | 17.11±4.38 | 15.97±3.99 | 14.82±3.66 | 16.66±5.67 | 15.50±5.26 | 16.01±1.08 | G=0.353 | |
TC | 17.65±3.76 | 17.51±3.83 | 16.82±3.74 | 17.85±4.35 | 17.64±3.80 | 17.50±1.13 | T=0.214 | T q =0.225 | |
Time Mean | 17.37±4.01 | 16.71±3.90 | 15.78±3.75†Ψ | 17.23±5.00 | 16.53±4.64 | G X T=0.721 | G X T L =0.388 | ||
Uric Acid (umol/L) | P | 328±66 | 317±66 | 444±136 | 367±80 | 349±88 | 361.12±20.37 | G=0.647 | |
TC | 306±52 | 310±54 | 470±117 | 350±93 | 302±79 | 347.44±21.28 | T<0.001* | T q <0.001* | |
Time Mean | 317±12 | 314±13 | 457±27†Ψ | 358±18†Ψ◊ | 325±17◊# | G X T=0.298 | G X T q =0.146 | ||
CK (U/L) | P | 468±288 | 322±243 | 451±267 | 967±700 | 855±981 | 613±82 | G=0.487 | |
TC | 843±1156 | 259±146 | 355±198 | 770±470 | 415±213 | 529±86 | T=0.025* | T q =0.222 | |
Time Mean | 656±172 | 291±42† | 403±49Ψ | 869±126Ψ◊ | 635±151Ψ | G X T=0.209 | G X T L =0.100§ | ||
Total Protein (mmol/L) | P | 78.67±6.11 | 67.55±7.96^† | 72.23±6.47†Ψ | 68.67±9.45† | 73.67±11.11†Ψ# | 72.16±1.52 | G=0.305 | |
TC | 80.53±4.60 | 74.13±2.62† | 74.59±4.18† | 72.43±6.72† | 70.66±7.92†Ψ◊ | 74.47±1.59 | T<0.001* | T q <0.001* | |
Time Mean | 79.60±1.14 | 70.84±1.26† | 73.41±1.15†Ψ | 70.55±1.72† | 72.17±2.03† | G XT=0.091§ | G X T q =0.018* |
Individual group and time data expressed as means ± SD, while group effects are presented as means ± SEM. Data represents the response to muscle catabolism, mechanical damage, and physiological stress at each test session during the 10 day intervention. MANOVA analysis revealed overall Wilks' Lambda time (p<0.001) and group x time (p=0.504). Univariate ANOVA p-levels from MANOVA analysis are presented for each variable. Univariate ANOVA p-levels are listed first by the Greenhouse-Geisser (GG) analysis and then by the within-subjects contrasts (WSC) to demonstrate the potential shape of the time or group x time interaction with significance indicated by the following super/subscripts: * indicates p<0.05 p-level significance, § indicates p<0.10 p-level significance. LSD post hoc analysis is indicated by the following superscripts: ^ represents p<0.05 difference between groups, † represents p<0.05 difference from baseline value, Ψ represents p<0.05 difference from pre-lift, ◊ represents p<0.05 difference from 60-min post, # represents p<0.05 difference from 24-hr post. AST Aspartate aminotransferase, ALT Alanine aminotransferase, BUN blood urea nitrogen, CK Creatine kinase, G group p-level, T time p-level, G x T interaction, q quadratic p-level, L linear p-level