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All Journal Jurnal Penelitian Pendidikan Indonesia
Ansar Ansar
Universitas Cenderawasih
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Effects of interval and fartlek training on VO₂max across leg muscle endurance levels Hakim Irwandi Marpaung; Evi Sinaga; Ilham Ilham; Kurdi Kurdi; Ipa Sari Kardi; Ansar Ansar; Irfan Deny Oktavian
JPPI (Jurnal Penelitian Pendidikan Indonesia) Vol. 12 No. 1 (2026): JPPI (Jurnal Penelitian Pendidikan Indonesia)
Publisher : Indonesian Institute for Counseling, Education and Theraphy (IICET)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29210/020267209

Abstract

This study aimed to compare the effects of interval and fartlek training on VO₂max improvement across different levels of leg muscle endurance. Twenty sports science students participated in a 2 × 2 factorial experiment, VO₂max and leg muscle endurance were assessed using the Multistage Fitness Test and Wall Sit Test, respectively. Data were analyzed using two-way ANOVA. Training method significantly affected VO₂max improvement (F = 21.443, p < .001), as did leg muscle endurance level (F = 160.105, p < .001). However, the interaction between the two factors was not significant (F = 3.905, p = .066). Interval and fartlek training produced different VO₂max adaptations, while leg muscle endurance was independently associated with VO₂max improvement; however, no significant interaction between the two factors was detected.
Co-Authors Evi Sinaga Hakim Irwandi Marpaung Ilham Ilham Ipa Sari Kardi Irfan Deny Oktavian Kurdi Kurdi