Just Do It!

C and her big brother, J, are doing their cardio workouts together.

J (panting): This...is...hard!
C: This...is...hard!
J: Just...keep...going!
C: Just...keep...going!
J: This is...no...trivial...matter!
C: No...trivial...matter!

What are they doing? Well, J is riding a stationary bike. And C is riding a rocking horse. LOL!!