Adult gymnastics conditioning plans tend to be lacking in adult gymnastics programs. A lot of adult gymnasts already work out on their own, and with practice time at a premium, many programs don't include a lot of conditioning. The other thing is, adult gymnasts can be coming from so many different places with strength, flexibility and endurance that it can be tricky for programs to serve all needs.
Gymnastics is arguably the most physically demanding sport in the world. If you don't physically prepare your body, you will increase risk of injury and make learning and perfecting skills so much harder. The truth is, not a lot of gymnastics coaches are experts in exercise physiology. They normally teach the conditioning they learned themselves as athletes decades ago. How times have changed in terms of using science to maximize results.
Why else is having scientifically based gymnastics conditioning plans so important?
Well, it's one of the only things you can control in gymnastics.
...You can't control when you might develop a fear or mental block.
...You can't control when you have a headache on the day of a meet.
...You can't control when you have a freak accident and get injured.
But...You can control your conditioning. You can control your physical preparation. And when you are more physically prepared, you will feel more mentally prepared, too. The two go together. Conditioning prepares your body for the demands of gymnastics, leaving you healthier and happier in the sport that I am sure you want to continue for years and years to come.
Bars is the most demanding event of all in terms of the conditioning required.