The US-based project management consulting company Cadence published over 100 short podcast covering a wide range of project management topics.
Although they stopped in January 2013, there are 109 podcasts to help project managers (and general managers!) to sharpen their skills whilst commuting or exercising.
Subscribe through iTunes here:
https://itunes.apple.com/gb/podcast/ask-cadence-project-management/id257164947?mt=2