could you mean how physical fitness is acquired from enough rest and proper nutrition?
I find my physical fitness needs more proper nutrition and rest. I love Taco Bell too much.
I am pretty toned from exercise, how about you? I'm not but do you train by increasing weights to increase your muscle force outputs? I wouldn't say it like that but yes, I do increase weights to train my muscles. I've seen some commercial about training and wondering if it's always been around? I feel like I got motivated by it years back. I don't know how long but its the current longest running infomercial. I see, well it's good that it's encouraging people to exercise, I think we all need to do it. There's some other things for fitness but I can't remember them.
Physical fitness is generally achieved through proper nutrition, moderate-vigorous physical exercise, and sufficient rest.