But weight training is essential.
Cardio only leave an older person with absolutely NO muscle mass and prone to injury picking up milk at the grocery store.
“But weight training is essential.”
Depends on your lifestyle. One of my hobbies is riding horses. Don’t spend much time in their mouths, although it can be needed at times, but shoveling manure and hauling 80 lb sacks of feed or 100 lb bales of hay isn’t going to leave me crippled picking up milk.
High intensity training is good if one wishes to compete, or to try to max out one’s fitness. But for long & healthy life, walking briskly an hour a day gives most of the benefit with very little wear & tear on the body.
I like riding horses, jogging, hiking. My fitness needs are different from a competitor in most sports. I wish people would learn life-long habits of sustainable activity. Met too many former football players, or serious lifters, or hard core runners who gave it up by 30 or 35.