Pilch Wanda, Tyka Anna, Cebula Agata, Śliwicka Ewa, Pilaczyńska-Szcześniak Łucja, Tyka Aleksander
Department of Biochemistry and Basics of Cosmetology, University of Physical Education, Kraków, Poland -
Departnent of Biological Regeneration, University of Physical Education, Kraków, Poland.
J Sports Med Phys Fitness. 2017 Jan-Feb;57(1-2):124-129. doi: 10.23736/S0022-4707.16.05964-X. Epub 2016 Jan 20.
Nordic walking is a form of physical activity recommended for people of all ages and it is used in disease prevention and health promotion. The study was aimed to determine if and in what ways a six-week Nordic walking training program in late autumn may affect 25(OH)D concentration in postmenopausal overweight women.
Two series of measurements were carried out in a group of 17 women aged 57±4.20 years with low physical activity level. The first series encompassed a 6-week Nordic walking training program at the intensity of 60-70% VO2max. Before and after the training program body composition was determined with a densitometer, and biochemical indices were measured in blood samples drawn at rest. After a year a second series of measurements at rest was carried out to determine whether changes in the vitamin D (25(OH)D) blood level were season-induced or modified by physical activity.
The Nordic walking training program contributed to a significant reduction of body mass, percentage fat volume and BMI in the examined women. The mean 25(OH)D concentration in the examined women significantly decreased after 6 weeks of training. No similar vitamin D level changes were observed in the II measurement series.
A six-week Nordic walking training program in late autumn contributed to the lowering of 25(OH)D blood concentration in women after 55 years of age. The decreased 25(OH)D concentration may have been a result of reduced dermal biosynthesis of vitamin D or due to vitamin D contribution to muscle metabolism. This is an indication that vitamin D3 supplementation should be recommended in periods of intense physical activity during months with little insolation, especially to overweight postmenopausal women.
北欧式健走是一种推荐给各年龄段人群的体育活动，用于疾病预防和健康促进。本研究旨在确定深秋为期六周的北欧式健走训练计划是否以及以何种方式影响绝经后超重女性的25(OH)D浓度。
对17名年龄在57±4.20岁、身体活动水平较低的女性进行了两轮测量。第一轮包括一项为期6周、强度为最大摄氧量60 - 70%的北欧式健走训练计划。在训练计划前后，用密度计测定身体成分，并在静息状态下采集的血样中测量生化指标。一年后进行了第二轮静息状态下的测量，以确定维生素D（25(OH)D）血液水平的变化是由季节引起的还是由体育活动改变的。
北欧式健走训练计划有助于显著降低受试女性的体重、体脂百分比和体重指数。受试女性的平均25(OH)D浓度在训练6周后显著下降。在第二轮测量中未观察到类似的维生素D水平变化。
深秋为期六周的北欧式健走训练计划导致55岁以上女性的25(OH)D血液浓度降低。25(OH)D浓度降低可能是由于皮肤维生素D生物合成减少，或者是由于维生素D对肌肉代谢的作用。这表明在日照较少的月份进行高强度体育活动期间，应建议补充维生素D3，尤其是对超重的绝经后女性。
