VO2 max is an established measure of cardiovascular fitness and aerobic performance capacity. Seeing your current fitness level and tracking how it changes over time makes all the difference. It helps you set suitable goals, assess your progress and gauge your training activity. It also keeps you motivated to reach the goals you have set.
The Firstbeat analytics engine in your Garmin watch gives you reliable VO2 max data by identifying, analysing and evaluating key performance data while you run. Your running pace shows how hard your body is working to perform. In most cases, internal and external load (exercise intensity vs running pace) is linear and stable. To run at a faster pace, your body has to work harder.
A smart analytics tool that identifies good data ensures that only the most relevant parts of your workout are used to estimate your fitness level. In practice, this means you don't have to worry about speeding up, slowing down, going uphill or downhill, or stopping at intersections. Just run the way you normally do, without any special fitness testing protocols.
VO2 max – your fitness level, combined with your training history, helps personalise training feedback, estimate recovery time, determine the optimal range for your weekly training load and assess your current training status.
Under certain conditions, your body has to work harder to maintain the same pace. Good examples are running in hot and humid environments or at altitude. When paired with your compatible smartphone, some of the latest Garmin devices can detect such situations and understand how they affect your performance data.
It also shows how well your body has adapted to the environment, detects and accounts for environmental effects on your performance, and improves the reliability of other metrics. All this provides more meaningful feedback in tough environmental conditions.
This includes, for example, feedback from the training status screen, which interprets changes in your VO2 max value in relation to your training load and activity history. If ignored, the effect of uneven terrain, or a drop in aerobic performance caused by altitude or hotter-than-usual conditions, could be mistakenly interpreted as underperformance or overreaching.
Trail running
The constantly changing conditions of trail running pose a significant challenge both for you and for performance data. Special attention must be paid to the extra effort that steep and variable terrain often requires.
Certain Garmin GPS watches feed accelerometer data to the Firstbeat analytics engine, supporting your Garmin watch's VO2 metrics. This makes it possible to factor the changing conditions underfoot into the performance analysis compared with how hard your body is working.
How long does it take to adapt to heat and humidity?
How quickly your body adapts to high temperatures depends on several factors.
One of the most important factors is the difference between your usual environment and the conditions you need to adapt to. The bigger the change, the longer it takes to adapt.
Another factor is the frequency and duration of your workouts and the time spent outdoors in the new environment. Adaptation processes depend on direct exposure to the environment.
Evidence shows that spending extended time in challenging climate conditions every day provides the necessary adaptation within one to two weeks. Athletes with higher VO2 max values typically adapt to challenging climate conditions much faster – in some cases, the adaptation period is half as long.
Physiological adaptations from heat acclimatisation
- Increased sweating
- Improved skin blood flow
- Improved cardiovascular stability (ability to maintain stable blood pressure and heart function)
- Improved fluid and electrolyte balance
