I liked the philosphy about balance which I think was from Chen Village
'IF YOU ARE TOO SOFT YOU DON'T PROGRESS AND IF YOU ARE TOO HARD YOU GRIND YOURSELF DOWN'
This is so true. The trick is to find that balance. Personally, I tend to vacillate between extremes. First, I left the MA completely for many years, and devolved into a couch potato. Eventually when I was in my early fifties, I got fed up with being heavy and in poor physical condition and began running and hiking, lifting, and practicing MA again. After about six months I became "addicted to training" and within a year or so, I got stronger than I'd been in years.
But after a couple of years I was overtraining to the point of repeatedly injuring myself. Injured hands and elbows from punching the wall-bag up to 5,000 times a session, injured shoulders from trying to bench over my own body weight with dumbells and things like doing up to 50 pull-ups and 130 push-ups in each set, and so on.
Well here's a reality check. Your body
does have limits. If you ignore these, you will pay the consequences. Especially as you move into your mid fifties and beyond. I ended up with some serious joint issues, and herniated disks in my back. I ended up selling my weights and had to give up running. My knees and ankles are not in good shape and, regarding the ankles, three top specialists have basically told me that there's nothing to be done. Either exercise or sit around on my duff. Either way, I gotta live with the pain.
In fact I got so disillusioned that I got fat and out of shape again ...up to a point. I'm still determined to advance in both the Martial arts I now train, and if time permits I'd still like to get into BJJ if I can work around my physical limitations. I'm NOT old, but I
am 60 and have to work with that.
Regarding limits... don't set limits in your mind, but do work respecting the physical limits of your body. Sometimes those physical limitations can actually help you in unexpected ways. As a sixteen year-old kid, I assisted my older brother teaching a summer rock climbing class at Dartmouth College where he was a student. I remember him pointing out how one of his best students was a girl with limited upper body strength. Unlike some of the strongest guys in the class, she
had to use good technique, flexibility, and leg strength to master certain bouldering problems. Same works for the Martial arts.
Sometimes your "handicaps" can be the key to your strengths.