Department of Physical Education and Lifelong Sports, Poznan University of Physical Education, 61-871 Poznan, Poland.
Doctoral School, Gdansk University of Physical Education and Sport, 80-336 Gdansk, Poland.
Nutrients. 2021 Dec 8;13(12):4393. doi: 10.3390/nu13124393.
The COVID-19 pandemic and subsequent self-isolation exacerbated the problem of insufficient amounts of physical activity and its consequences. At the same time, this revealed the advantage of vitamin D. Thus, there was a need to verify the effects of those forms of training that can be performed independently. In this study, we examined the effects of Nordic walking (NW) and high intensity interval training (HIIT) with regard to the impact of the metabolite vitamin D. We assigned 32 overweight adults (age = 61 ± 12 years) to one of two training groups: NW = 18 and HIIT = 14. Body composition assessment and blood sample collection were conducted before starting the training programs and a day after their completion. NW training induced a significant decrease in myostatin ( = 0.05) concentration; however, the range was dependent on the baseline concentrations of vitamin D metabolites. This drop was accompanied by a significant negative correlation with the decorin concentration. Unexpectedly, NW caused a decrement in both forms of osteocalcin: undercarboxylated (Glu-OC) and carboxylated-type (Gla-OC). The scope of Glu-OC changes was dependent on a baseline concentration of 25(OH)D (r = -0.60, = 0.01). In contrast, the HIIT protocol did not induce any changes. Overall results revealed that NW diminished the myostatin concentration and that this effect is more pronounced among adults with a sufficient concentration of vitamin D metabolites.
新冠疫情和随后的自我隔离加剧了身体活动不足及其后果的问题。与此同时，这也凸显了维生素 D 的优势。因此，有必要验证那些可以独立进行的训练形式的效果。在这项研究中，我们研究了北欧式健走（NW）和高强度间歇训练（HIIT）对代谢产物维生素 D 的影响。我们将 32 名超重成年人（年龄=61±12 岁）分为两组：NW 组 18 人，HIIT 组 14 人。在开始训练计划之前和完成训练计划后的一天，我们进行了身体成分评估和血液样本采集。NW 训练导致肌肉生长抑制素（=0.05）浓度显著降低；然而，这种降低的范围取决于维生素 D 代谢物的基线浓度。这种下降伴随着与核心蛋白聚糖浓度的显著负相关。出乎意料的是，NW 导致两种形式的骨钙素（非羧化型（Glu-OC）和羧化型（Gla-OC））都减少。Glu-OC 变化的范围取决于 25(OH)D 的基线浓度（r=-0.60，=0.01）。相比之下，HIIT 方案没有引起任何变化。总体结果表明，NW 降低了肌肉生长抑制素的浓度，而且这种效果在维生素 D 代谢物浓度足够的成年人中更为明显。
