Bergvall is most known as head coach for heptathlon (pentathlon indoors) star Carolina Klüft. He is also physical rehabilitation and development coach for several other athletes like hurdlers Susanna and Jenny Kallur, tennis professional Joachim Johansson and several teams in soccer, handball and bandy. Since 2006 he is also the responsible fitness coach of Malmö FF.
Bergvall also serves as coach for IFK Växjö and is a frequent speaker on issues of leadership in sports and physical development.
Bergvall is regarded, together with Yannick Tregaro, as one of Sweden's most prominent coaches.
Before switching to coaching he was a decent athlete competing in decathlon on national level (PB 6.509 p).