These areas are often neglected in typical workout routines, thus performing planks which give attention to the posterior muscles improves their strength and flexibility. (fitwirr.com)
They were dressed in typical workout gear so I have no doubt that this hour of walking in circles around the park was definitely considered «exercise.» (fitnessunderoath.com)
Typical workouts include 10 minute warm up, 30 - 45 minutes weight training, and possibly HIIT for 10 - 15 minutes depending on the length of the lift portion (6 days / week). (legionathletics.com)