In natural light, check the appearance of your veins beneath your skin. If your veins appear blue or purple, you have a cool skin tone. If your veins look green or a greenish blue, you have a warm skin tone. If you can't tell whether or not your veins are green or blue, you probably have a neutral skin tone.
If Cecelia wants to lower her heart rate she should lower the speed she is going at on her tradmill so that she does not have to breath was much for oxygen