Not much of anything.
Really. There's no changes that I can see that would be of any value to you, as a Fitness Instructor. The preferences section is exactly the same – OK, not exactly; they've removed the option for gap-less playback, but kept the cross-fade.
Nothing else to see here. Move along…
John is a member on the AFS (Association of Fitness Studios) Advisory Council.
Holding certifications from; Schwinn, Heart Zones, Team ICG and Life Time Fitness, John's held regularly scheduled cycling classes between 1998 and 2015 when he moved to Florida.
When the weather permits, you'll find him riding and leading outdoor groups by himself or with his Tandem partner (wife) Amy.