What are the components of the thin filaments of striated muscle?

The main one is actin. Actin in a protein that forms its molecules to form twisting chains into a helix formation. These proteins support the contraction of muscles. 

Well if you pick a machine to work on and that's gonna be your exercise if you don't stick to that machine your muscle strength your muscle mass rather will change because you haven't been doing it you change something in your exercise routine which changes your body's form of dealing with things for example you might become weaker or stronger depending on what kind of exercises you do in whether or not the machine you picked actually your muscles grow.

Write down your emotions and write down how u feel and be open minded with people and tell them how you feel