An adult body is not a blank canvas, there have been already many "drawings" made on it, through lifestyle, past physical activities, past injuries, postural habits... in a word: life. That's why, contrary to kids that receive all the same training, the older you are the more specific and personalized your training become. Nobody can teach you exactly what's best for your body type, you have to try things out and make adjustments along the way. For example: some warm ups are really beneficial to you, but not to someone else. Some moves will look okay on you but better on someone else and viceversa. You're unique! And so your training should be. These are some of my finds, remember not excuses but actual facts that I have to consider to keep training in a smart way and continue to improve.
Height: I'm tall (5'11"). There is a reason why circus performers are usually short! It's easier to bend and balance a small/short body rather than a big/long one. My frame will always challenge my balance and put my lower back under strenuous work, since the lower back not only bends but supports and holds the weight of legs in inverted positions (cheststands, handstands) and of the torso in standing backbends (like going into bridge). This means I have to alternate intense stretches with easier variations to avoid too much soreness.
harder on lower back
easier on lower back
Past injuries: if you're active, you'll experience some type of injury. It's a fact! The only way to be immune to injuries is basically live in bed lol, but even that wouldn't be good for you. So there will be injuries that will heal completely and never come back, other ones will come and go, some will stay with you and you have to live with them! That's another reason why your training becomes so individual and specific, you have to adapt it around your injury. For example, I have a shoulder I hurt a while ago, I can stretch it but I know its limits, and I know which stretches help loosing it up and which ones just make it hurt more.
Injury example: a strain to the long head of biceps femoris (hamstrings)
Body Structure: this is about proportions. Long legs will tire lower back faster, bigger bone structure means more challenging bending ( I think it has to do with size in general, longer muscles, thicker ligaments, more tissues to bend, more distance to go from A to B). Someone with a short torso and big butt will reach headsit easier than someone with long torso and no butt! Size matters.
Imbalances: we all have a predominant side, either a stronger one or a more flexible one, most of people also have a slight scoliosis. Uneven strength and uneven flexibility, mixed with some scoliosis cause imbalances that needs to be addressed with correct exercises, making sure to reduce the difference as much as possible. This way you avoid future injuries or wear and tear of a specific area of your back - or hip etc.
Me a while ago, noticeably imbalanced with my right back side being less bendy
All this goes into: Moves that hurt / moves that fit: some positions you will try and find very akward and uncomfortable, but eventually get better at it. Others, will never get better or just keep hurting. That's when you can choose (especially if creating a performance piece), what your body type looks better doing and FEELS better doing. But not before learning all the basics! (Cheststands etc).
Crocodile is probably one of my best moves :D
Rest: Training every day won't make you better, you will accumulate a lot of soreness and the risk of injuries will greatly raise. Training creates "mini damages" to your muscles and tissues that need to be healed each time, so you can do it again and again and get better at it. If you don't heal you can aggravate these mini damages. I take at least 1-2 days off a week and alternate intense with less intense sessions. Sleep and days off are essential as training days are.
Remember you only have one body, train smart ;)