Landram Michael J, Koch Alexander J, Mayhew Jerry L
Department of Exercise Science and Sport, The University of Scranton, Scranton, PA, USA -
Health and Exercise Sciences Program, Lenoir-Rhyne University, Hickory, NC, USA.
J Sports Med Phys Fitness. 2020 Jan;60(1):152-159. doi: 10.23736/S0022-4707.19.09977-8. Epub 2019 Oct 24.
The purposes of this study were to determine differences in training loads and stress hormones among national level powerlifting competitors and the effect on performance.
Thirteen experienced male powerlifters provided detailed training logs during the 8 weeks prior to a national competition. Participants were divided into linear (LP, N.=6) and undulating periodization (UP, N.=7) training groups. Following weigh-ins and after successfully completing the competition, participants provided saliva samples.
LP resulted in lower levels of salivary cortisol (sC) (LP 4.27±0.71 nmols/L; UP 5.53±0.78 nmols/L) and higher testosterone-to-cortisol ratio (T:C) (LP 8.03±0.84 nmols/L; UP 5.23±1.41 nmols/L) compared to UP prior to competition. Following competition, both LP and UP groups had significant increases in salivary testosterone (sT) (LP 383.70±34.96 nmols/L; UP 376.62±38.17 nmols/L) and sC (LP 17.67±1.39 nmols/L; UP 18.17±1.46 nmols/L) and significant reductions in T:C (LP 8.03±0.80 to 6.67±0.83; UP 5.23±1.41 to 4.95±1.00). Finally, the UP group had a significantly higher Wilks coefficient following the competition compared to the LP group (LP 440.7±31.83 vs. UP 480.29±24.13).
It appears that the higher volume loads undertaken by UP have a larger perturbation on resting stress hormones; however, this does not seem to negatively influence powerlifting performance.
本研究的目的是确定国家级力量举运动员在训练负荷和应激激素方面的差异以及对运动表现的影响。
13名经验丰富的男性力量举运动员在全国比赛前8周提供详细的训练记录。参与者被分为线性周期训练组（LP，n = 6）和波动周期训练组（UP，n = 7）。在称重后和成功完成比赛后，参与者提供唾液样本。
与赛前的UP组相比，LP组的唾液皮质醇（sC）水平较低（LP组为4.27±0.71纳摩尔/升；UP组为5.53±0.78纳摩尔/升），睾酮与皮质醇比值（T:C）较高（LP组为8.03±0.84纳摩尔/升；UP组为5.23±1.41纳摩尔/升）。比赛后，LP组和UP组的唾液睾酮（sT）均显著增加（LP组为383.70±34.96纳摩尔/升；UP组为376.62±38.17纳摩尔/升），sC也显著增加（LP组为17.67±1.39纳摩尔/升；UP组为18.17±1.46纳摩尔/升），T:C显著降低（LP组从8.03±0.80降至6.67±0.83；UP组从5.23±1.41降至4.95±1.00）。最后，比赛后UP组的威尔克斯系数显著高于LP组（LP组为440.7±31.83，UP组为480.29±24.13）。
看来UP组进行的较高训练量对静息应激激素有更大的干扰；然而，这似乎并未对力量举表现产生负面影响。
