School of Kinesiology, George Mason University, Manassas, Virginia.
J Strength Cond Res. 2021 Feb 1;35(Suppl 1):S107-S113. doi: 10.1519/JSC.0000000000003764.
Merrigan, JJ and Jones, MT. Acute inflammatory, cortisol, and soreness responses to supramaximal accentuated eccentric loading. J Strength Cond Res 35(2S): S107-S113, 2021-The purpose was to determine differences in time under tension, cortisol, inflammation, and perceived soreness between accentuated eccentric (AEL) and traditional loading (TRA) resistance exercise protocols. Resistance-trained men (n = 21) completed the AEL and TRA protocols in a random order, separated by 48 hours (sets × reps at eccentric/concentric) as follows: AEL65, 3 × 5 at 120/65% 1 repetition maximum (RM); AEL80, 3 × 3 at 120/80% 1RM; TRA65, 3 × 5 at 65/65% 1RM; and TRA80, 3 × 3 at 80/80% 1RM. Four linear position transducers measured eccentric time under tension (ETUT) and total time under tension (TTUT). Ultrasonography measured vastus lateralis muscle thickness and echo intensity at baseline and immediately post-exercise. Salivary cortisol was assessed at baseline, 0-, 15-, 30-, and 60-minute post-exercise. Perceived soreness was assessed at baseline, 24-, and 48-hours post-exercise. During rep 1, AEL65 and AEL80 had longer ETUT and TTUT than TRA65 (p ≤ 0.002) and TRA80 (p ≤ 0.008), respectively. However, AEL65 had shorter ETUT (reps 3-5) and TTUT (reps 3-5) than TRA65 (p ≤ 0.043). Similarly, ETUT (reps 2-3) and TTUT (rep 3) was shorter in AEL80 than TRA80 (p ≤ 0.045). However, there was no protocol effect for ETUT and TTUT (p > 0.05). Muscle thickness changes were trivial after each protocol (AEL80, d = 0.19; TRA80, d = 0.15; AEL65, d = 0.24; TRA65, d = 0.23), but changes in echo intensity were moderate (AEL80, d = 0.61; TRA80, d = 0.61; AEL65, d = 0.61; TRA65, d = 0.76). Salivary cortisol decreased below baseline at 30- and 60-minute post-exercise (p ≤ 0.006). Perceived soreness elevated from baseline to 24 hours for AEL80 (p = 0.006). The inflammatory, cortisol, and soreness responses after AEL were either low or similar to TRA, indicating similar recovery patterns between protocols.
梅里根，JJ 和琼斯，MT。超最大增强离心加载对急性炎症、皮质醇和酸痛的反应。J 力量与调理研究 35（2S）：S107-S113，2021-目的是确定增强离心（AEL）和传统加载（TRA）抗阻运动方案在时间张力、皮质醇、炎症和感知酸痛方面的差异。经过力量训练的男性（n = 21）以随机顺序完成 AEL 和 TRA 方案，间隔 48 小时（偏心/向心的组数×重复次数），如下所示：AEL65，3×5，120/65%1 重复最大（1RM）；AEL80，3×3，120/80%1RM；TRA65，3×5，65/65%1RM；和 TRA80，3×3，80/80%1RM。四个线性位置传感器测量偏心时的张力（ETUT）和总张力下的时间（TTUT）。超声测量股外侧肌厚度和基线及运动后即刻的回声强度。基线、运动后 0、15、30 和 60 分钟时评估唾液皮质醇。基线、24 小时和 48 小时时评估酸痛。在第 1 次重复时，AEL65 和 AEL80 的 ETUT 和 TTUT 比 TRA65（p≤0.002）和 TRA80（p≤0.008）更长，而 AEL65 的 ETUT（重复 3-5）和 TTUT（重复 3-5）比 TRA65 短（p≤0.043）。同样，AEL80 的 ETUT（重复 2-3）和 TTUT（重复 3）比 TRA80 短（p≤0.045）。然而，在 ETUT 和 TTUT 方面，协议之间没有差异（p＞0.05）。每个方案后肌肉厚度变化都很小（AEL80，d=0.19；TRA80，d=0.15；AEL65，d=0.24；TRA65，d=0.23），但回声强度的变化则适中（AEL80，d=0.61；TRA80，d=0.61；AEL65，d=0.61；TRA65，d=0.76）。唾液皮质醇在运动后 30 分钟和 60 分钟时降至基线以下（p≤0.006）。AEL80 的酸痛感从基线升高到 24 小时（p=0.006）。AEL 后的炎症、皮质醇和酸痛反应较低或与 TRA 相似，表明两种方案的恢复模式相似。
