Performance and recovery: effects of caffeine on a 2000-m rowing ergometer
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ORIGINAL ARTICLE
Performance and recovery: effects of caffeine on a 2000‑m rowing ergometer Mohammad Ali Gharaat1 · Mohsen Sheykhlouvand2 · Leila Abarghani Eidi3 Received: 23 October 2019 / Accepted: 7 April 2020 © Springer-Verlag Italia S.r.l., part of Springer Nature 2020
Abstract Introduction This study investigated the effects of caffeine on subsequent performance and recovery from a 2000-m rowing ergometer. Materials and methods Nine trained male rowers (18.3 ± 1.1 years) consumed 3 or 6 mg kg−1 of caffeine or placebo. In three sequential time trials (TT), 30-min after (Trial1) and 6.5 h after (Trial2) caffeine intervention, participants performed a 2000-m ergometer effort. Power output (PO), stroke rate (SR), and time were monitored during the TTs. Ventilatory variables, serum creatine kinase (CK), blood lactate (BLa), and heart rate (HR) were recorded in Trial1 and Trial2, 30 min after Trial1 (1st recovery) and 30-min before Trial2 (2nd recovery). Results After ingesting 6 mg kg−1 of caffeine, PO was significantly greater in Trial1 (8.2%) compared to the placebo. Also ̇ 2peak during Trial1 (10.1%) and 2 (13.9%), HR at VO ̇ 2peak (5.5%), HRVO during Trial1 (10.0%) significant increases in VO 2peak ̇ ̇ and 2 (11.3%), VO2 /HRpeak in Trial1 (19.6%) and 2 (17.3%), VO2 at lactate threshold (LT) in Trial1 (24.6%), and significant decrease in ventilatory evaluation ( V̇ E ) (9.0%) were shown in 6 mg kg−1 compared to placebo. In recovery phase, minute ventilation (MV) was significantly higher in 1st (17.1%) and 2nd recovery (28.7%) and RER increased in 1st recovery (9.9%, P = 0.04) in 6 mg kg−1 compared to placebo. CK increased significantly in 2nd recovery (14.1%). BLa in 6 mg kg−1 was higher than placebo in Trial1 (18.6%) and Trial2 (24.4%). Conclusion Based on improvements in ventilatory variables, and decreased CK and BLa levels after 6 mg kg−1 caffeine ingestion in performance and recovery, this study provides novel data by demonstrating that pre-exercise caffeine ingestion improves performance and subsequent recovery from rowing effort. Keywords Ergogenic effects · Post-exercise recovery · Ventilatory evaluation · Performance · Anaerobic threshold · Trained rowers Abbreviations TT Time trials PO Power output SR Stroke rate CK Creatine kinase BLa Blood lactate HR Heart rate * Mohammad Ali Gharaat [email protected]; [email protected] 1
Department of Exercise Physiology, Faculty of Sport Sciences, Shahid Rajaee Teacher Training University, Shaebanlou Str, Tehran, Iran
2
Department of Exercise Physiology, Faculty of Sport Sciences, University of Guilan, Rasht, Iran
3
Department of Exercise Physiology, Faculty of Sport Sciences, Kharazmi University, Tehran, Iran
̇ 2peak Peak oxygen uptake VO HRVO2peak Heart rate at VO2peak ̇ 2peak Heart rate at VO ̇ 2peak HR@VO V̇ E Ventilatory evaluation MV Minute ventilation RER Respiratory exchange ratio LT Lactate threshold ̇ 2/HR Oxygen pulse (O2 pulse) VO
Introduction Evidences about caffeine ingestion widely declare significant
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