If you've noticed that your arms and upper body are lacking in tone or strength you can improve them even if you feel you don't have time or energy for yourself.  It's as simple as doing pushups!  The busiest person can squeeze 5 minutes into their day three days a week.  Even if it's at night after an exhausting day.  You can read for yourself the benefits you can derive from this simple exercise. You're initial thought may be that you don't like pushups or that you can't do them.  But, you can do them and they can become a moment in your day when you're doing something for yourself that makes you look and feel better.  I know first hand! 

I'm not a health provider or fitness trainer.  But, I know from personal experience this has helped the tone and strength in my arms and upper body overall.   Soon after I had my daughter, my arms were so weak I couldn't even do one pushup.  Rather than focusing on how pathetic this seemed,  I was determined to change this and I did.  I'm now up to doing 90 to 100 military style pushups in 3 sets three times a week.    It really makes me feel like I've accomplished something for my body. 

The proper form for doing pushups is simple.  Before starting stretch out your upper body a little and then go for it.  This is the system that worked for me:  See how many you can do.  If it's one or not quite one, that's okay!  It will get better.  If you can't do military style push ups, do them on your knees.  After seeing how many you can do, you're done and on your way to improving yourself!  Do this three days a week.  Over time, you'll be able to do more and before you know it, you'll be up to 10.  It could take a month or maybe more.  Keep sticking with it.  You're getting stronger and feeling better overall.   Once you've reached 10 pushups, do a second set after resting a minute or two following the first set.  Work your way up to two sets of 10 over time.  When you've gotten to that, it's time to start three sets of 10.  Do as many repetitions as you can for each set, resting in between.  If the first set is 15, the second is 10 and the third is 2, that's fine.  If you did start doing pushups on your knees, eventually try doing them with your weight on your feet rather than your knees.     

This is such a small investment of your time that you can do anywhere at anytime.  There's no excuse not to do them.  Start today!