Via Ross training.
"The video below was sent to [Ross] by a proud daughter. Within the clip, you’ll see her parents (who are also grandparents) training for the Tough Mudder obstacle course.
In the words of their daughter,
“One of the things I like the best is they do a lot of training together (even though they are very different sizes), and always have a fun and playful attitude. My mom just took her first parkour class a few weeks ago, and they are constantly looking for new challenges. They are great parents, grandparents, and role models.”"