Correlation Between VO2max Estimates of the 30-15 Intermittent Fitness Test and the 20-m Shuttle Run Test in Professional Female Volleyball Players

Abstract

Aerobic capacity is a crucial determinant of performance in volleyball, a sport characterized by intermittent high-intensity efforts. Field-based tests such as the 20-meter Shuttle Run Test (20 mSRT) and the 30-15 Intermittent Fitness Test (30-15 IFT) are commonly used to estimate maximal oxygen uptake (VO2max) in athletes. However, the degree of agreement between these tests in elite female volleyball players remains unclear. This study aimed to compare VO2max estimates obtained from the 20 mSRT and 30-15 IFT in professional female volleyball players and assess the level of agreement between the two tests. Eight professional female volleyball players (age: 23.3 ± 2.1 years; height: 182.1 ± 5.4 cm; body mass: 72.4 ± 4.8 kg) completed both the 20 mSRT and 30-15 IFT. A paired-sample t-test was used to compare VO2max values between tests, and intraclass correlation coefficient (ICC 3,1) was calculated to assess agreement. Pearson correlation analysis was also performed between the test results. VO2max values estimated from the 30-15 IFT (48.10 ± 5.03 ml·kg⁻¹·min⁻¹) were significantly higher than those from the 20 mSRT (35.49 ± 3.19 ml·kg⁻¹·min⁻¹) (p < 0.001, d = 2.80). A strong positive correlation was found between the two tests (r = 0.833, p = 0.010). However, the ICC (3,1) value of 0.754 (95% CI: 0.176–0.945) indicated only moderate agreement.

Keywords

• Aerobic Capacity
• 30-15 Intermittent Fitness Test
• 20-m Shuttle Run Test
• VO2max
• Body Mass Index

Profesyonel Kadın Voleybolcularda 30-15 Aralıklı Kondisyon Testi ve 20-m Mekik Koşusu Testinin VO2max Tahminleri Arasındaki Korelasyon

Abstract

Aerobik kapasite, aralıklı yüksek yoğunluklu eforlarla karakterize edilen bir spor olan voleybolda performansın önemli bir belirleyicisidir. Sporcularda maksimal oksijen tüketimini (VO2max) tahmin etmek için 20 metre Mekik Koşusu Testi (20 mSRT) ve 30-15 Aralıklı Kondisyon Testi (30-15 IFT) gibi saha tabanlı testler yaygın olarak kullanılmaktadır. Ancak, elit kadın voleybolcularda bu testler arasındaki uyum derecesi belirsizliğini korumaktadır. Bu çalışmanın amacı, profesyonel kadın voleybolcularda 20 mSRT ve 30-15 IFT'den elde edilen VO2max tahminlerini karşılaştırmak ve iki test arasındaki uyum düzeyini değerlendirmektir. Sekiz profesyonel kadın voleybolcu (yaş: 23.3 ± 2.1 yıl; boy: 182.1 ± 5.4 cm; vücut kütlesi: 72.4 ± 4.8 kg) hem 20 mSRT hem de 30-15 IFT'yi gerçekleştirmiştir. Testler arasında VO2max değerlerini karşılaştırmak için Paired Sample t-testi kullanılmış ve uyumu değerlendirmek için sınıf içi korelasyon katsayısı (ICC 3,1) hesaplanmıştır. Test sonuçları arasında Pearson korelasyon analizi de yapılmıştır. 30-15 IFT'den (48,10 ± 5,03 ml-kg-¹-dk-¹) hesaplanan VO2max değerleri 20 mSRT'den (35,49 ± 3,19 ml-kg-¹-dk-¹) önemli ölçüde daha yüksektir (p < 0,001, d = 2,80). İki test arasında güçlü bir pozitif korelasyon bulunmuştur (r =0.833, p=0.010). Ancak, ICC (3,1) değeri 0,754 (%95 CI: 0,176-0,945) sadece orta düzeyde bir uyum olduğunu göstermiştir.

Keywords

• aerobik kapasite
• 30-15 Aralıklı Kondisyon Testi
• 20-m Mekik Koşusu Testi
• VO2max
• Vücut Kitle İndeksi

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