The second episode is dumb gymnastics (thin arm) PS: dumbbell exerciser. This is supposed to exercise muscles.
The third episode is aerobics (shaping)
The fourth set of yoga mat exercises (thin belly)
Fitness dance 1 It's normal to feel sore after practice. The explanation is valid. It's a sign of losing weight, don't worry. I hope my parents will succeed in fitness. O(∩_∩)O