Fat burning heart rate

The image depicts a “heart rate fuel profile” graph, which shows the relationship between heart rate (horizontal axis) and the use of energy sources (fat and glycogen, vertical axis).

Fat burning

Fat burning increases as heart rate increases, then peaks at a certain point (around a heart rate of 120-130) and then decreases.

Glycogen utilization

Glycogen utilization increases continuously as heart rate increases, becoming especially dominant in higher heart rate ranges.

Crossroads

The curves for fat and glycogen utilization intersect, indicating the point where the use of one energy source becomes dominant over the other.

Heart rate zones

Based on the graph, it can be observed that fat burning dominates during lower intensity workouts, while glycogen utilization becomes dominant during higher intensity workouts.

Essence

The “heart rate fuel profile” graph illustrates how the ratio of energy sources used by the body (fat vs. glycogen) changes as a function of heart rate:

Fat burning

As the heart rate increases, fat burning also increases, reaching a maximum at a heart rate of approximately 120-130 , after which it gradually decreases.

Glycogen utilization

This energy source becomes more dominant as heart rate increases, especially during higher intensity (higher heart rate) workouts.

Intersection point

There is a point (usually around a heart rate of 120-130) where the rate of fat and glycogen utilization is equal, from here glycogen becomes the main energy source.

Heart rate zones

At lower intensities (lower heart rate), fat will be the dominant use, while at higher intensities (higher heart rate), glycogen will be the dominant use.