What level of fitness or equipment do I need for these classes?

On the Just Move homepage, you can filter workouts for Start, beginner, intermediate, and advanced.

Start workouts are designed people who've been inactive for a while, or who have sensitive joints or chronic conditions, and need a more accessible and gentler routine. If you're completely new to movement, recovering from an injury, or just jumping back in, these are the classes for you. 

Beginner classes focus on establishing good form, and move at a slower pace.

Intermediate workouts are higher intensity and faster paced, and assume that people doing them are familiar with the moves.

Advanced workouts are meant to be a challenge, with high-intensity moves that often combine cardio with strength or core work. 

There are bodyweight (no equipment) workouts available at every level. Other classes, especially for strength workouts, recommend using dumbbells — if you have no weights, you can always use water bottles, books, or other things around your house.

The only workouts series that should be done primarily in a gym is the In the Gym program.