High dose vitamin D supplementation decreases the risk of deficiency in male conscripts, but has no effect on physical performance-A randomized study.

Physical load during military training might increase the need for vitamin D; therefore, supplementation could be beneficial for 25(OH)D serum levels and physical performance. One hundred and twelve male conscripts were randomized into two vitamin D oil capsule supplementation groups: 55 participants in the 600 IU group and 57 in the 4000 IU group with a follow-up period from July 2021 to May 2022. Physical fitness tests were performed in July, October and May. Hand grip strength tests were performed in July, October and January. Blood serum (25(OH)D), parathyroid hormone PTH), calcium and ionized calcium (i-Ca) values were measured in July, October, January and May. The 600 IU group had a lower ( A 10-month vitamin D supplementation with 4000 IU decreased the incidence of vitamin D deficiency (<75 nmol/L) in young, male army conscripts during wintertime, but no differences in physical performance were found compared to 600 IU supplementation. Level I, Prospective randomized study.

Informations de copyright

© 2024 The Authors. Journal of Experimental Orthopaedics published by John Wiley & Sons Ltd on behalf of European Society of Sports Traumatology, Knee Surgery and Arthroscopy.

Déclaration de conflit d'intérêts

Leho Rips: Consultant Orthopedic Surgeon of Estonian Defence Forces. Alar Toom, Rein Kuik, Marika Laidvere, Mart Kull, Helena Gapeyeva, and Madis Rahu: No conflict of interest. Ahti Varblane, Hanno Mölder, and Ragnar Kibur: Doctor of Estonian Defence Forces. Jüri‐Toomas Kartus: Lecturing for ConMed, Sweden.