Combined effects of very short “all out” efforts during sprint and resistance training on physical and physiological adaptations after 2 weeks of training
The aim of this study was to compare the combined effects of resistance and sprint training, with very short efforts (5 s), on aerobic and anaerobic performances, and cardiometabolic health-related parameters in young healthy adults.
Thirty young physically active individuals were randomly allocated into four groups: resistance training (RTG), sprint interval training (SITG), concurrent training (CTG), and control (CONG). Participants trained 3 days/week for 2 weeks in the high-intensity interventions that consisted of 6–12 “all out” efforts of 5 s separated by 24 s of recovery, totalizing ~ 13 min per session, with 48–72 h of recovery between sessions. Body composition, vertical jump, lower body strength, aerobic and anaerobic performances, heart rate variability (HRV), and redox status were evaluated before and after training. Total work (TW), rating of perceived exertion (CR-10 RPE) and mean HR (HRmean) were monitored during sessions. Incidental physical activity (PA), dietary intake and perceived stress were also controlled.
Maximum oxygen consumption (VO2max) significantly increased in SITG and CTG (P < 0.05). Lower body strength improved in RTG and CTG (P < 0.05), while countermovement jump (CMJ) was improved in RTG (P = 0.04) only. Redox status improved after all interventions (P < 0.05). No differences were found in TW, PA, dietary intake, and psychological stress between groups (P > 0.05).
RT and SIT protocols with very short “all out” efforts, either performed in isolation, or combined, demonstrated improvement in several physical fitness- and health-related parameters. However, CT was the most efficient exercise intervention with improvement observed in the majority of the parameters.
KeywordsHigh-intensity interval training Sprint interval training Concurrent training Cardiometabolic health Performance
Detrended fluctuations of short-term fractal scaling
Brazilian 10-item version of the perceived stress scale
Concurrent training group
RPE Category-ratio 10 scale rating of perceived exertion
High-intensity interval training
Heart rate variability
International physical activity questionnaire
Respiratory exchange ratio
Resistance training group
Root mean square of successive differences between R–R intervals
Maximal pedaling rate
Standard deviation of all R–R intervals
Sprint interval training
Sprint interval training group
Thiobarbituric acid reactive substances
Maximum oxygen consumption
We would like to thank Arilson de Sousa, Danielle Garcia, Fernanda Rodrigues, Leticia Freire, Lysleine Deus, Gabriela Thomaz and Lucas Pinheiro for their help during the data collection. This work was funded by Conselho Nacional de Desenvolvimento Científico e Tecnológico (PQ2, PQ1B), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior and Agencia Nacional de Investigación e Innovación.
SB-F, DAB, and TSR conceived the study design. SB-F, ARM, and TSR conducted the experiments. SB-F and EI-S conducted the statistical analyses. SB-F, EI-S, TSR, KD and DAB interpreted the results. SB-F, FAV, EI-S, TSR, ARM, KD and DAB: wrote the manuscript. All authors read and approved the final manuscript version.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
All procedures performed were in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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