Exercise
The daily routine for getting stronger is 50 push-ups and 100 sit-ups, taking it up as fast as you can until you reach 1000 sit-ups and 500 push-ups. The speed may depend on other factors such as health and even belief, so don't worry if you take longer than your favorite anime characters, though you should still aim for the best result, if you want to.
You may find it fun to, for push-ups or sit-ups do a challenge where you have to pay for any food in n push-ups.
I did one. For example, a banana costed 30 push-ups.
It was fun!
As for balancing, balancing is incredibly fun and can be practiced by yourself by trying to stay on one leg. It is an interesting underappreciated skill I have found useful to show off to kids sometimes, though it also has practical uses.
Biking is incredibly fun. I highly recommend you watch Abroad in Japan's "Journey Across Japan" series if you want to get inspired. I did a challenge where, with little biking training, I decided I would try to bike 300km in 7 days.
Day one went well. Day two went well, as I biked after school, but I got a fever. Day three started doing less, at which point I realized I had taken on a way bigger challenge than I could deal with and quit.
The reason I did that biking challegne is partly because in Romania biking is incredibly dangerous, especially for beginners, so I wanted to first train, but I wanted to try training as fast as possible. I wanted to one day also do a challenge of biking to Constance and 2 Mai and that area on bike, which I hope to one day do, together with a whole series, "Journey Across Romania". I think we need more such series. To show off the amazing parts of a country as we have found them, most of all if we are someone that has lived in that country for years, and I imagine everyoone has a unique experience and places they like, so if someone has done a series, it doesn't mean others can't too, though admittedly, they might, unless you get some kind of weird deal, have to make it with a different name, yes, but that's part of the magic.
Scooters are also fun, and less dangerous if you live in a country like Romania.
Finally, doing pull-ups on a bar can be fun, and can help one with climbing trees, which can be an incredibly fun experience.
Yet again, as I have in all sections on this list of physical health, I will advise not giving in to the fools who see life as a dangerous hard world and who wish to prevent all injury, even to the extent of hating, wanting to control, the one that's "endangering themselves".
A life not lived having fun is not a life. Besides, I suspect if you are happy, you are not going to jump from a tree and break some bones, and even if you do, it's an experience.
Let us forgive each other and stop fighting "not getting hurt", and just have fun.
Whatever family you come from, tree-climbing is for you, and while we are at that, tree-hugging too, though I don't advise doing it in public like I did for a while when there's an easier approach of just sending them love from afar, in your imagination, which works using the laws of quantum physics, this love beaming/prayer.
Just like with all exercise, love beaming should not be overdone, and should be grown slowly. If you feel tired, don't force yourself.
You can force yourself, but the results will be boring, and your goal is to have fun.
Instead you can relax. If your home isn't exactly relaxing for you, you can imagine being taken care of by others. Imagine a friend with you, in an anime avatar or any avatar. Someone taking care of you. Whatever planet you are on, it is your right as a child of God to experience love and association with anything in the Universe. Provided it doesn't hurt you, of course, which you can do too, but again, it's boring to do that, so just don't expose yourself to danger.
I guarantee you no suffering is needed to live and learn information, so you don't need to go around exposing yourself to dangerous things that will manipualte you to learn about them.
Anyone telling you otherwise is a liar.
Your goal, overall, training, should be to enjoy your life at peace, because indeed, if peace is so great, and includes so much training, adventure, and learning, what else could you want?
I will end this section with one note, the compound effect of training can be rather amazing, and over a year it goes up to roughly 37 times, using the laws of growth as defined by the constant e. You mathematicians will like this. Over 100 days if you get better by 1% at something you will get better at it by e, so 2.718. If you get better at it by 10% you will get better by 10e, so 27.18, and this gets even crazier when you realize that is multiplied by itself for every other 100 days, so in 200 days it will be e*e, or 10e*10e respectively, the latter leading you to about 738.9 times improvement if you go up by exactly 10% every day in 200 days.
It's crazy.
So you shouldn't beat yourself up if you can't do something from the beginning. You will, with time, be able to do it. I promise. You just have to keep going and if you're stuck, improve your methods. Perhaps eating better will help. Perhaps so on. There is so much to do!
And even your relationship with time can be trained.