Zone 2 Training Research

Beta-Alanine Boosts Reps in Advanced Strength Protocols by 18% Four weeks of beta-alanine supplementation increased the total number of repetitions youn…

Four weeks of treadmill training in low-oxygen air led to far larger improvements in men with lower starting fitness compared to their more aerobically fit peers. A study by Limingfei Zhou, Haitao Zhu, and Luyu Zhang assigned 22 healthy men to either a lower-fitness (LF) or higher-fitness (HF) group based on an initial treadmill test,…

A ketone monoester supplement, taken with caffeine, allowed endurance-trained men to exercise for 27% longer in a high-intensity time-to-exhaustion test following 90 minutes of work in the heat. This performance boost came without a corresponding increase in heart rate or core temperature, according to a new study published in the *Journal of the International Society…

A 20-minute swim at 55-65% of maximum heart rate significantly reduced lactic acid levels in combat athletes after intense exercise, providing a clear recovery advantage over passive rest. Key Takeaways Active swimming recovery (20 min at 55-65% max HR) led to a significant drop in lactic acid in judo and taekwondo athletes. The method was…

Twice-weekly high-intensity interval training yielded the most favorable balance of fitness gains and participant adherence in a new study on physically active male university students. The research, led by Hanwen Zhang and colleagues, tested three different weekly frequencies of a 4×4 minute HIIT protocol over six weeks. While all groups improved, the twice-weekly schedule produced…

Introduction A new study from China suggests supplementing with enteric-coated sodium bicarbonate for several days can improve anaerobic power, a findin…

Introduction For cyclists and endurance athletes, managing lactate is central to performance

A 2026 review proposes that the transient lactate produced during exercise acts as a molecular signal for mood regulation, offering a new model for how physical activity combats depression. Key Takeaways Exercise-induced lactate is more than a metabolic byproduct; it acts as a signaling molecule detected by the HCAR1 receptor on immune and brain cells….

Swimming for Cardiovascular Health: A Deep Dive into the Science Regular swimming is consistently linked to a reduced risk of cardiovascular disease and…

Ketone monoester and caffeine supplementation improved working memory accuracy and extended high-intensity endurance by nearly two minutes during exercise in extreme heat. This new finding comes from a study published in the *Journal of the International Society of Sports Nutrition* by researchers at the University of South Carolina [PMID: 42460838](https://pubmed.ncbi.nlm.nih.gov/42460838). The work examines whether ketone…