Nombre: CARINE DANIELLE FERREIRA COSTA LEITE
Fecha de publicación: 03/12/2025
Junta de examinadores:
Nombre |
Papel |
|---|---|
| DANILO SALES BOCALINI | Presidente |
| GREGG MALLETT | Examinador Externo |
| LIVIA CARLA DE MELO RODRIGUES | Examinador Externo |
| LUDMILA FERREIRA MEDEIROS DE FRANCA CARDOZO | Examinador Externo |
| RODRIGO LEAL DE QUEIROZ THOMAZ DE AQUINO | Examinador Interno |
Páginas
Sumario: Introduction: Bodyweight HIIT (HIIT-C) utilizes bodyweight exercises such as jumping jacks, burpees, mountain climbers, and squat jumps in a high-intensity, all-out session followed by passive or active recovery. Intramuscular acidosis resulting from the accumulation of H+ ions during high-intensity activity is identified as an important factor in muscle fatigue, and thus, sodium bicarbonate (NaHCO3) supplementation has been considered capable of increasing buffering capacity, resulting in decreased acidosis and increased performance. There are no data in the literature on the effect of NaHCO3 supplementation in bodyweight HIIT (HIIT-C) sessions on markers of exercise-induced muscle damage (EIMD) and psychophysiological parameters, which is the objective of this study. Methodology: Thirteen healthy, physically active male volunteers aged 20 to 40 participated in the study. All participants signed an informed consent form. This study was approved by the Human Research Ethics Committee of the Federal University of Espírito Santo under protocol number 5.185.275/2021. Supplementation consisted of 0.3 g/kg of NaHCO3 and placebo on different days. Participants randomly performed the following protocols: 1) HIIT-C session, "all-out" intensity, and NaHCO3 supplementation. 2) HIIT-C session, "all-out" intensity, and placebo supplementation. The session lasted 20 minutes, with 30 seconds of active and 30 seconds of passive activity. Analyses of subjective perception of effort and pain were recorded using the Borg scale (0-10), EVA, Corlllet Diagram, pressure algometer, in addition to analyses of limb circumference, physical performance, mood and pleasure scale, all of which were assessed at baseline, before, immediately after the session and 24 hours after the session. Serum samples were collected to assess creatine kinase (CK), creatine kinase-MB (CK-MB), lactate dehydrogenase (LDH), pH, and bicarbonate (HCO3) concentration at baseline, pre-, immediately post-, and 24 hours post-session. Lactate was also collected and assessed using a portable device at baseline, pre-, and post-HIIT-C. All data were presented as mean ± standard deviation (SD). Differences between post-exercise and intra-condition measurements were analyzed using ANOVA and Tukey's or Bonferroni post hoc test at a p0.05 level, using the PRISMA program. Results: NaHCO3 supplementation increased (p0.05) [HCO3] before exercise initiation and resulted in higher (p0.05) [La-] and [Ph] when compared to placebo. Although the NaHCO3 session had a higher (p0.05) HR, it did not differ (p0.05) in RPE and RSP from the placebo session. The NaHCO3 session presented a higher (p0.05) total number of movements when compared to the placebo session. Both supplementations showed reduced pleasure, with increased fatigue, mental confusion, mood disturbance, and pain in the leg and extended arm after HIIT-C, but without differing (p0.05) between supplementations. A reduction in the pressure threshold to pain in the biceps was observed after the placebo session, but without differing (p0.05) from NaHCO3, and a reduction in the pressure threshold to pain in the triceps after the NaHCO3 session, but without differing (p0.05) from placebo, with a significant increase (p0.05) in pain in the right thigh after HIIT-C with NaHCO3 when compared to placebo. No significant changes (p 0.05) were found in limb circumferences and countermovement jumping between the placebo and NaHCO3 protocols. A significant increase (p 0.05) was observed in triceps thickness 24 hours after the NaHCO3 session when compared to pre-placebo. Significant increases (p 0.05) in CK 24 hours after the placebo session, LDH and CK-MB immediately after the placebo session were observed. The NaHCO3 session showed a significant increase (p 0.05) in CK-MB immediately after, but without differing from the placebo session. Conclusion: NaHCO3 supplementation improved performance and possibly attenuated or prevented EIMD.
Keywords: Sodium bicarbonate, HIIT-C, Performance, Muscle damage.
