If you've noticed any troubling symptoms remember that this week is great for having a physical examination. The same can be said about your diet and your fitness ' if you've been neglecting these areas of your life it's high time you started to give them more attention.
It's possible that you don't feel strong enough and decide to give up in a couple of days. Don't do it! Practice makes perfect, and it won't take you much time to reach outstanding results if you try really hard.