The first activity of fitness that I participate in would be considered more moderate, is yoga. While this activity may sound neither moderate or vigorous in its intensity, it takes a lot of muscle strength and patience. It not only increases your flexibility, but it also increases muscle strength and tone and improves respiration, energy, and vitality. The second activity is also not very vigorous but still has plenty of health benefits is pilates. This is similar to yoga in that it improves your flexibility. It also is similar to yoga in that it increases your muscle strength and tone, but particularly of your abdominal muscles, lower back, hips, and buttocks (the 'core muscles' of your body).
These to activities are incredibly healthy unlike some forms of fitness that may appear to be healthy but in the end, have some detrimental results to the body.
Anyway, I hope this helps you, (sorry it took me so long) and have a great day!! :)