We Bare Bears - Season 4 - Eps 29: The Gym
At the suggestion of a member, the Bears decide to go to Mystique Physique Gym in see if they are "gym material". Grizz takes part in rock wall climbing only to be outdone by a child, Panda takes up virtual biking that goes from calm to terrifying and Ice Bear takes a tai-chi class where he goes up against some intimidating old ladies.
About We Bare Bears

Title: We Bare Bears
First Air Date: 2015-08-24
Last Air Date: 2019-05-27
Status: Ended
Rating: 7.72/10 (from 1801 votes)
Language: EN
Seasons: 5
Total Episodes: 138
Network: Cartoon Network
Genres: Family, Comedy, Animation, Kids
Production Companies: Cartoon Network Studios
Synopsis
Three brother bears awkwardly attempt to find their place in civilized society, whether they're looking for food, trying to make human friends, or scheming to become famous on the internet. Grizzly, Panda and Ice Bear stack atop one another when they leave their cave and explore the hipster environs of the San Francisco Bay Area, and it's clear the siblings have a lot to learn about a technologically driven world. By their side on many adventures are best friend Chloe (the only human character in the cast), fame-obsessed panda Nom Nom, and Charlie, aka Bigfoot.
Cast

Eric Edelstein
Grizzly (voice)

Demetri Martin
Ice Bear (voice)

Bobby Moynihan
Panda (voice)