I'm not sure how old you are, but it's been a battle for me at age 50 to let go of my younger self. I still feel as though I'm surfing better than I ever have, and I'm learning to wing foil, but at the same time, I've had to reframe my expectations. I get injured more easily. It takes more time to recover from a big day of fun, and there are certain things I may not be able to learn due to time and my body not holding up. Time is a major factor in keeping in shape and learning new things. Darn kids get in the way of everything. Hah! Remember anything is better than nothing. You can also mix it up on your walks to hit different muscle groups.