Trek claims "up to 48x", not "48x." This means "48x or less", same thing. As for the test data it should all be reproducible and independently verifiable.
http://trek.scene7.com/is/content/Tr...ct_testing.pdf
__________________
"This 7:48 cycling session burned 5933 calories. Speed up recovery by replacing them with a healthy snack." - Whoop