Can HRV be Improved with Specific Exercise?

Since HRV is an indicator of nervous system health, and so many factors contribute to that, it is difficult to say what type of exercise is best at improving HRV. 

That said, in our experience, aerobic focused training, 30-90 minutes in the lower heart rate zones, has the most significant impact on improving HRV. However, this is still very individual and something you would need to experiment with.