Definitely agree. And any of the following if you're physically able: For my dad: I'll add in kayaking or canoeing (through a club, training with competitors),

Definitely agree. And any of the following if you're physically able: For my dad: I'll add in kayaking or canoeing (through a club, training with competitors), for my mom: rowing (same, again). For myself: mid-to-long distance running mixed with shorter sprints. It's also good for the knees if you look after your health, do it regularly, and wear proper shoes for the terrain and your body.