The Relation of Vitamin D Levels to Isokinetic Muscular Strength In Adolescent Athletes

Year 2019, Volume: 3 Issue: 2, 178 - 183, 23.08.2019

Sabriye Ercan

https://doi.org/10.30565/medalanya.527532

Abstract

Aim: To determine the relation between vitamin D levels and isokinetic muscular strength in athletes, and to compare the muscular strength between athletes with and without vitamin D deficiency. 

Methods: The records in the sports medicine clinic were examined, where the general medical examinations and performance analyses of the athletes had been conducted. The data of the athletes were examined, whose serum 25-OH vitamin D levels had been determined and isokinetic knee flexion-extension muscular strength test had been conducted. Age, height, body weight, discipline of sports, the year of beginning to sports and training duration per week (hours/week) were recorded for each athlete. The athletes were separated into two groups as vitamin D levels below 20 ng/mL (Group 1) and above 20 ng/mL (Group 2). 

Results: There was not any statistically significant difference between the demographic data and training data of the groups (p˃0.05). Vitamin D deficiency was found in 44% of all the athletes. The average vitamin D level was 13.8 ng/mL for Group 1, and 27.2 ng/mL for Group 2 (p:0.001). The serum calcium and serum phosphor levels were similar (p˃0.05). The isokinetic muscular strength test did not yield a difference between the two groups. It was found that vitamin D levels did not show any correlation with demographic data, training details and with any parameter of muscular strength (p˃0.05). 

Conclusion: In this study, there are no difference in effect of vitamin D on muscle strength, but significant results could be obtained in other studies with large participants. 

Keywords

Vitamin D, muscular strength, knee, athlete

Adolesan Sporcularda D Vitamini Düzeyi İle İzokinetik Kas Kuvvetinin İlişkisi

Abstract

Amaç: Bu çalışmanın amacı, sporcularda D vitamini düzeyi ile izokinetik kas kuvveti arasındaki ilişkiyi belirlemek, D vitamini eksikliği olan ve olmayan sporcuların kas kuvvet değerlerini karşılaştırmaktır. 

Yöntem: Spor Hekimliği kliniğinde genel tıbbi muayeneleri ve performans analizleri yapılan sporculara ait kayıtlar incelendi. Serum 25-OH vitamin D düzeyi belirlenen ve izokinetik diz fleksiyon-ekstansiyon kas kuvvet testi yapılan sporculardan çalışmaya dahil edilme kriterlerine sahip olanların verileri analiz edildi. Sporcuların; yaş, boy, vücut ağırlığı, spor branşı, spora katılma/başlama süresi (yıl) ve haftalık antrenman süresi (saat/hafta) kaydedildi. Sporcular, D vitamini düzeyine göre 20 ng/mL altında (Grup 1) olanlar ve üstünde (Grup 2) olanlar olmak üzere iki gruba ayrıldı. 

Bulgular: Grupların, demografik veriler ve antrenman detayları arasında fark yoktu (p˃0.05). Tüm sporcuların %44’ünde D vitamini eksikliği belirlendi. Grup 1’in vitamin D düzeyi 13.8 ng/mL, Grup 2’nin ise 27.2 ng/mL idi (p:0.001). Grupların serum kalsiyum ve serum fosfor değerleri benzerdi (p˃0.05). İzokinetik kas kuvvet testi sonuçları, gruplar arasında istatistiksel anlamlı fark oluşturmadı (p˃0.05). Vitamin D düzeyinin; demografik veriler, antrenman detayları ve kas kuvvetine ait tüm parametreler ile korelasyon göstermediği saptandı (p˃0.05). 

Sonuç: Bu çalışmada, D vitamininin kas kuvvetine olan etkisi açısından fark bulunmamıştır ancak geniş katılımcı kitleleri ile yapılacak başka çalışmalarda anlamlı sonuç elde edilebilir. 

Keywords

D vitamini, kas kuvveti, diz, sporcu

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