Kristopher Mendes de Souza @KristopherDoc

@folha O vagabundo que primeiramente a perseguiu e a derrubou.

#APSselect | BR Rønnestad et al. Heat training augments hemoglobin mass during a moderate-altitude training camp in well-trained endurance athletes (ow.ly/1Qp150Z7Mko) 🥵

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A study in the journal examined the effects of 12 weeks of high-intensity interval training (HIIT) on aerobic fitness and vascular function in healthy adults. Results showed improved aerobic capacity but no protection against sitting-induced impairments. bit.ly/4uRBraX

Research Article by RS Ghitter (@MartinMacInnis) #Sexdifferences in the power-duration relationship for dynamic #knee extension are largely explained by #muscle size ow.ly/trX450Z0bro

📚resistance exercise increased muscle protein synthesis in trained women, but menstrual cycle phase did not alter the acute response Practical takeaway: don’t overcomplicate it—train consistently, adjust to symptoms, and let progression drive results journals.lww.com/acsm-msse/abst…

A new Cell Metabolism paper has generated considerable discussion by showing that mitochondria can dynamically handle lactate and that mitochondrial lactate may participate in redox regulation cell.com/cell-metabolis… Interesting study with elegant methods. My concern is not that these findings are incompatible with the lactate shuttle hypothesis. They are not. My concern and question are how large is this pathway relative to the much larger lactate fluxes occurring through glycolysis, cellular lactate exchange, cell-to-cell shuttling, tissue-to-tissue lactate transport, and mitochondrial lactate oxidation? For over 50 years, evidence has shown that lactate is one of the body's most important energy intermediates, continuously produced, exchanged, transported and oxidized across multiple tissues. Nothing in this study challenges that foundation. And my main concern is that without sufficient physiological context, mechanistic findings can be interpreted in ways that confuse a broader audience that is only now beginning to move beyond the outdated idea of lactate as a waste product and understand lactate metabolism. It is not whether a pathway exists. It is how much it contributes to cellular metabolism. In physiology, flux matters. My last Substack 👇 substack.com/@inigosanmillan

Long-term resistance training with all-cause and cause-specific mortality: assessing dose-response and joint associations with aerobic physical activity pubmed.ncbi.nlm.nih.gov/42230125/

Consistent with the broader body of research, this study found that training with a moderate proximity to failure (20% velocity loss) produced the greatest strength gains, whereas training closer to failure (40% velocity loss) elicited the largest increases in muscle size. Take-home message: Proximity to failure appears to be goal-dependent. Training closer to failure becomes increasingly important when the primary objective is maximizing hypertrophy, whereas strength development may be optimized by stopping sets somewhat further from failure. journals.lww.com/nsca-jscr/full…

True. That said, I'm not a fan of NHST for drawing conclusions, particularly in studies with relatively small sample sizes. The raw changes scores suggest a modest benefit to >VL. Certainly not definitive, but supports the collective evidence on the topic (e.g., pubmed.ncbi.nlm.nih.gov/38970765/).

🆕 Determining jump and change of direction inter-limb asymmetries over pre-season in basketball players: An individualised approach tandfonline.com/doi/full/10.10…

Low carbohydrate availability reduces power output at the moderate-to-heavy transition, impairs efficiency, and increases median power frequency during cycling in females link.springer.com/article/10.100…

Cyclists are advised to use heart rate and RPE with FTP-derived training zones for demarcating exercise intensity. FTP alone seems to underestimate the physiological and psychological demands at workloads ≥85% of FTP. tandfonline.com/doi/full/10.10…

Pleased to share our abstract poster for our recent study: 'Durability of International and National Junior and U23 Triathletes: A Simulated Stochastic Sprint Triathlon Cycle Elicits Significant Declines in Running Physiology and Performance Indices' doi.org/10.1123/ijspp.…

An interesting case study on Kristian Blummenfelt: "The findings question the validity of the 2.5× basal metabolic rate ceiling, suggesting world-class athletes may sustain energy expenditure well beyond previously accepted physiological limits." journals.physiology.org/doi/full/10.11…

This one finds that the co-ingestion of glucose and fructose at altitude increases exogenous and spares endogenous carbohydrate oxidation over glucose alone, as seen at sea level, but this did not provide a performance benefit compared to glucose alone.

Honored to contribute a chapter to the 2nd Edition of Performance Assessment in Strength & Conditioning.📚 My chapter “Interpretation of Results” focuses on making sense of athlete assessment & monitoring data to support informed decision-making in applied performance settings.

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Our new special issue on 'Exercise as Medicine' is now live! Read the introductory Editorial from Guest Editors Ronan Berg, Colleen Deane, Jill Barnes and Harry Rossiter here: 📖 buff.ly/rUdSPIn Read the full issue here: 📖 buff.ly/J8l6Oam

@folha Exatamente por isso que PCC e CV agora são considerados terroristas.

Now available ahead of print: Seasonal Associations Between Isometric Strength and Dynamic Performance in Elite Youth Soccer Players, by Nikolaos D. Asimakidis, Marco Beato, Chris Bishop, and Anthony N. Turner. doi.org/10.1123/ijspp.…

Now available ahead of print: Ovarian Sex Hormones and Substrate Oxidation During a High-Intensity Interval Exercise: A Comparative Analysis Across Distinct Phases of Females’ Hormonal Profiles, by José Antonio Benítez-Muñoz and colleagues. doi.org/10.1123/ijspp.…