In the endurance sports world, few topics have generated as much discussion lately as Zone 2 training. Once considered a basic form of “long, easy miles,” this intensity zone is now at the center of debates among coaches, athletes, and scientists. But what exactly is Zone 2, why does it matter, and how can athletes make …
Read more “Unlocking Endurance: The Science and Practice of Zone 2 Training”
In our constant pursuit of unraveling the secrets of endurance performance, we’ve already explored the First Ventilatory Threshold (VT1) as the foundation of our endurance. Today, we’ll raise the intensity to understand the next physiological milestone: the Second ventilatory threshold (VT2). What is the Second Ventilatory Threshold? The Second Ventilatory Threshold, commonly known as VT2 or also called …
Read more “Breaking your limits: how to train and improve VT2 for high intensity”
As experts in physiology and performance, we know that endurance success lies in deeply understanding our body’s signals. Today, we’ll delve into a fundamental concept for athletes and coaches: the First Ventilatory Threshold (VT1). The First Ventilatory Threshold, or VT1, is a critical physiological point during progressive exercise. It represents the exercise intensity at which a …
Read more “First Ventilatory Threshold (VT1): The physiological key to your endurance performance”
In endurance training, Rating of Perceived Exertion (RPE) has long been a trusted compass—an intuitive guide to how hard an athlete feels they’re working. But how reliable is this perception in real-time, especially under fatigue, heat, or glycogen depletion? More importantly, can we measure how well athletes are controlling their RPE, and should we compare what they …
Read more “Why Monitoring RPE—and Comparing It to Respiratory Frequency—Matters More Than You Think”
Success in endurance sports isn’t just about grit—it’s about precision. One of the most overlooked performance strategies is aligning your race pacing with your ventilatory thresholds. Whether you’re targeting a 10K or a 100-miler, understanding how each race maps to your body’s internal limits is critical. That’s exactly where CHASKi steps in. CHASKi is the first wearable designed specifically for …
Read more “Race Pacing Starts with Physiology: Why Matching Distance to Your Thresholds Matters”
For decades, heart rate has been the go-to metric for athletes and coaches aiming to optimize performance. It’s convenient, widely accessible, and often seen as a universal marker of effort. However, heart rate is far from perfect. Recent research, including findings from the Journal of Sports Science and Medicine (Tocco, 2015), highlights significant limitations of …
Read more “Why Heart Rate Alone Isn’t Enough: Rethinking Performance Metrics”
Ventilatory Threshold and Lactate: Complementary Metrics for Smarter Training In the world of endurance training, metrics reign supreme. From heart rate to power output, athletes rely on data to refine their training strategies and achieve peak performance. Among these metrics, ventilatory threshold (VT) and blood lactate levels stand out as two of the most insightful …
Maximal oxygen uptake (VO₂max) is the cornerstone of endurance performance, and two recent studies confirm that aerobic high-intensity interval training (HIIT) is superior to sprint interval training (SIT) in improving VO₂max for both men and women. For endurance coaches and self-educated athletes, these findings offer critical insights into structuring training programs for peak performance. Key Findings From …
Read more “HIIT vs. Sprint Intervals: How to Optimize VO₂max for Endurance Athletes”
Understanding the science behind exercise testing and training intensity zones is key to optimizing performance for endurance athletes. At CHASKi, we emphasize the value of data-driven training based on ventilatory thresholds, and today we’ll explore why testing and threshold-based training are so impactful. We’ll also dive into a cyclist’s case study, showcasing how CHASKi helped …
Read more “Unlocking Performance Gains: The Power of Personalized Training Zones with CHASKi”
Research suggests that controlled, deliberate breathing patterns can dramatically affect sports outcomes. For instance, specific breathing techniques have been shown to enhance endurance performance by improving oxygen utilization and delaying the onset of fatigue[1]. Other studies have documented how different breathing techniques can either enhance or impair athletic performance, depending on their application, underscoring the …
Read more “Introduction to Breathwork for Endurance Athletes”