Shahid Beheshti University Journal of Sport and Exercise Physiology 2676-3710 13 2 2021 02 19 The effects of short-term vitamin D supplementation on the pulmonary function and physical fitness factors in adolescent wrestlers The effects of short-term vitamin D supplementation on the pulmonary function and physical fitness factors in adolescent wrestlers 97 109 100872 10.52547/joeppa.13.2.97 FA Hersh Nouri Department of Physical Education and Sport Sciences, University of Kurdistan, Sanandaj,Iran Dariush Shaikholeslami Vatani Department of Physical Education and Sport Sciences, University of Kurdistan, Sanandaj,Iran 0000-0002-9771-8806 Naser Rostamzadeh Department of Physical Education and Sport Sciences, University of Kurdistan, Sanandaj,Iran Journal Article 2018 08 28 <strong>Purpose</strong>: The aim of the present study was to investigate the effects of short-term vitamin D supplementation on the pulmonary function and physical fitness factors in adolescent wrestlers. <strong>Methods</strong>: 36 wrestlers (age: 16.18 ± 0.81 years, height: 171.5 ± 5.7 cm, weight64.2±.36 kg, BMI: 21.6 ± 1.75kg/m², Ft mass: 8.9±1.82%) participated in this study. The subjects in the experimental group received 2000 IU of vitamin D daily and the control group received the same amount of placebo for 14 days, during which time they also performed wrestling training (5 sessions per week). To investigate the research variables, serum 25(OH)D levels, pulmonary function by spirometry test and physical fitness indices were measured twice, before and after supplementation periods. The data were analyzed using the analysis of covariance. <br /><strong>Results</strong>: Results showed that vitamin D levels (23%) and FVC indices (20%), FEV1 (17%), MVV (12%), FEV1 / FVC (11%), FEF25 / 75 (13%) were higher significantly in vitamin D compare with placebo group (P>0.05). But there was no significant difference between PEF, FEF25, FEF75, FEF50 and physical fitness factors (shuttle run, 50m sprint, sit-ups, pull-ups, push-ups and Sargent jump) in the experimental group compared to the placebo group (P>0.05). <strong>Conclusion</strong>: The present findings of this study indicated that short-term vitamin D supplementation may improve pulmonary function in adolescent wrestlers by affecting respiratory muscle strength and decreasing airway resistance but did not affect their physical fitness. <strong>Purpose</strong>: The aim of the present study was to investigate the effects of short-term vitamin D supplementation on the pulmonary function and physical fitness factors in adolescent wrestlers. <strong>Methods</strong>: 36 wrestlers (age: 16.18 ± 0.81 years, height: 171.5 ± 5.7 cm, weight64.2±.36 kg, BMI: 21.6 ± 1.75kg/m², Ft mass: 8.9±1.82%) participated in this study. The subjects in the experimental group received 2000 IU of vitamin D daily and the control group received the same amount of placebo for 14 days, during which time they also performed wrestling training (5 sessions per week). To investigate the research variables, serum 25(OH)D levels, pulmonary function by spirometry test and physical fitness indices were measured twice, before and after supplementation periods. The data were analyzed using the analysis of covariance. <br /><strong>Results</strong>: Results showed that vitamin D levels (23%) and FVC indices (20%), FEV1 (17%), MVV (12%), FEV1 / FVC (11%), FEF25 / 75 (13%) were higher significantly in vitamin D compare with placebo group (P>0.05). But there was no significant difference between PEF, FEF25, FEF75, FEF50 and physical fitness factors (shuttle run, 50m sprint, sit-ups, pull-ups, push-ups and Sargent jump) in the experimental group compared to the placebo group (P>0.05). <strong>Conclusion</strong>: The present findings of this study indicated that short-term vitamin D supplementation may improve pulmonary function in adolescent wrestlers by affecting respiratory muscle strength and decreasing airway resistance but did not affect their physical fitness. https://joeppa.sbu.ac.ir/article_100872_c5dec1c8d66731bfa82785d8bfbe5c2c.pdf