If you’re using a fitness watch, you likely keep track of your VO2 max, although it’s traditionally considered less precise than lab tests. Nonetheless, these devices offer valuable insights over time regarding fitness trends—whether your VO2 max is improving or not.
More compelling is the collective data from users of devices like the Apple Watch and Coros, providing a wider lens on how different training approaches influence VO2 max levels. Let’s break down these findings.
The Role of Volume in VO2 Max Enhancement
Recent data indicates that overall workout volume is a significant factor in VO2 max improvement. More time spent on training correlates with enhanced fitness levels. While experts don’t consider volume the primary method for building VO2 max, it contributes to durability. This refers to how well your VO2 max, lactate threshold, and running economy endure in long-distance events, as explained by Dr. Michael Joyner, a noted expert at the Mayo Clinic in Minnesota.
To illustrate, participants in the Apple Heart and Movement Study recorded "above average" cardio levels with an average of over 200 minutes of activity weekly. Those with "high" VO2 max levels clocked more than 300 minutes weekly. Interestingly, users with superior cardio fitness exercised about 15 minutes more each day compared to those with lower levels.
Coros data supports these findings, showing a correlation between running frequency and VO2 max changes. For instance, running four days a week related to a 0.1 percent VO2 max increase over 12 weeks, while running six days per week linked with a 0.4 percent uptick.
Similarly, the distance ran plays a role: completing 40K to 60K per week associated with a 0.2 percent VO2 max change, while exceeding 100K (about 62 miles) corresponded to a 0.5 percent increase. Those numbers might seem small, but they can lead to noticeable performance boosts—such as improving your running pace.
Interestingly, Coros users improved their pacing with less than 13 miles weekly, enhancing from an average of 17:06 to 15:04 over 12 weeks. On the flip side, those running 50 miles or more achieved pace improvements from 13:21 to 10:04.
The long run also influences VO2 max; runners covering 15K or more in one go saw a 0.2 percent improvement compared to less than 15K, which resulted in a maximum 0.1 percent gain.
Both Apple and Coros calculate VO2 max based on heart rate and running pace during outdoor activities, blending technology with traditional training metrics.
Effective Training Strategies for Maximizing VO2 Max
Volume and frequency matter, yet Dr. Joyner emphasizes specific workouts that yield the highest VO2 max improvements. He points out “long intervals” as particularly effective—recommendations include three to five-minute efforts at roughly a 5K race pace. For example, consider five three-minute intervals or six 800-meter repetitions with brief jogging breaks.
Straightforward guidelines indicate that effort needs to be significant but not overwhelming. According to Joyner, you shouldn’t need to bend over afterward; if you do, you probably ran too hard.
These intervals effectively stimulate the heart, enhancing cardiac output and stroke volume, while enabling muscles to utilize oxygen more efficiently and generating energy. This will result in better oxygen delivery to muscles, enhancing overall performance and making exercise feel less daunting.
Another impactful workout, Joyner notes, is the threshold run, done at 80 to 90 percent of your 10K pace. Coros data indicates that by incorporating threshold workouts, users can see an average VO2 max increase of 0.6 percent over 12 weeks—a remarkable figure for dedicated athletes.
Further, Apple data suggests that adopting progressively challenging training regimens fosters VO2 max improvements, indicating that enhancing your cardiorespiratory fitness transcends merely engaging in easy running.
Why Monitoring VO2 Max Matters
Dr. Joyner highlights that various factors like age, genetics, and gender influence VO2 max measurements. For instance, participants who were male, started from a lower fitness base, and were under 30 years old were likely to see substantial improvements, exceeding 1 mL/kg/min.
Yet, assessing VO2 max is not solely about numbers; both subjective signs—like perceived effort—and objective outcomes, such as race performance, also serve as indicators of progress. Joyner challenges readers to observe whether they're running faster at a perceived lesser effort, alongside scrutinizing race times as key metrics.
Beyond performance metrics, enhancing VO2 max can benefit runners by allowing for easier runs at slower paces. Furthermore, a high VO2 max is linked with reduced risks of conditions, including diabetes and heart disease, and contributes to lower all-cause mortality rates.
