Sharp Matthew H, Shields Kevin A, Rauch Jacob T, Lowery Ryan P, Durkee Shane E, Wilson Gabriel J, De Souza Eduardo O
Applied Science and Performance Institute, Tampa, FL 33607, USA.
Department of Health Sciences and Human Performance, The University of Tampa, Tampa, FL 33606, USA.
Sports (Basel). 2016 May 6;4(2):26. doi: 10.3390/sports4020026.
Periods of intense training can elicit an acute decline in performance and body composition associated with weakened hormone profiles. This study investigated the effects of a multi-ingredient performance supplement (MIPS) on body composition and hormone levels in college athletes following a six-week training protocol. Twenty male college athletes were equally assigned to MIPS and placebo (PLA) groups for supplementation (three pills, twice daily) in conjunction with resistance training and specialized sports training (e.g., nine total sessions/week) for six weeks. Dual Energy X-ray Absorptiometry determined body composition at weeks 0 and 6. Serum samples collected at weeks 0 and 6 determined free testosterone (FT), total testosterone (TT), IGF-1 and total estrogen (TE) levels. PLA experienced a significant decline in lean body mass (LBM) (-1.5 kg; < 0.05) whereas the MIPS sustained LBM. The MIPS increased TT 21.9% (541.5 ± 48.7 to 639.1 ± 31.7) and increased FT 15.2% (13.28 ± 1.1 to 15.45 ± 1.3 ng/dL) ( < 0.05). Conversely, PLA decreased TT 7.9% (554.5 ± 43.3 to 497.2 ± 39.1 ng/dL), decreased FT 17.4% (13.41 ± 1.8 to 11.23 ± 2.55 ng/dL), and decreased FT:E 12.06% ( < 0.05). These findings suggest the MIPS can prevent decrements in LBM and anabolic hormone profiles during intense training periods.
高强度训练阶段可能会引发与激素水平下降相关的运动表现和身体成分的急性下降。本研究调查了一种多成分运动补剂（MIPS）对大学运动员在为期六周的训练方案后身体成分和激素水平的影响。20名男性大学运动员被平均分为MIPS组和安慰剂（PLA）组，在进行抗阻训练和专项运动训练（如每周共9次训练课）的同时进行补剂服用（每日两次，每次3粒），为期六周。双能X线吸收法测定第0周和第6周时的身体成分。在第0周和第6周采集血清样本，测定游离睾酮（FT）、总睾酮（TT）、胰岛素样生长因子-1（IGF-1）和总雌激素（TE）水平。PLA组的去脂体重（LBM）显著下降（-1.5千克；<0.05），而MIPS组维持了LBM。MIPS组使TT升高了21.9%（从541.5±48.7升至639.1±31.7），使FT升高了15.2%（从13.28±1.1升至15.45±1.3纳克/分升）（<0.05）。相反，PLA组使TT下降了7.9%（从554.5±43.3降至497.2±39.1纳克/分升），使FT下降了17.4%（从13.41±1.8降至11.23±2.55纳克/分升），并使FT:E下降了12.06%（<0.05）。这些发现表明，MIPS可以在高强度训练期间防止LBM和合成代谢激素水平的下降。
