Dancing and stiffness and feeling heavy?

i love music and i like to dance, i sometimes feel very uptight and stressed on how i look. I am very self conscious about my body. I am in decent shape. I am stiff at times, I feel like my legs are to heavy , i feel lik emy whole body is heavy. I feel like i should take joint supplement to help my joints become less stiffer. I am ot heavy i just feel heavy. And is all the time. Any advise on dancing? how to be less stiff? joint/fish oil supplements?

Can I have some reviews on personal or your child's experience on a Dance Performance/Company team?

(Studio only, not school) From minis, to teenagers. How do you like having your child on a Dance Performance Team? What places do you normally get to perform at (what types of events)? Do you have to pay for the event if it is some place such as Disneyland? Pros and cons? Is it worth the high cost?

Update : So this year for our recital theme it's Bring Back The Big Bands. I'm looking for a good song to do for my 10+ Pre Pointe Class. I'm really into really "big" songs I guess you could say, so I'd love something that would be really unique for a young ballet class! Thanks in advance!!