Triceps - Hands on the arm rests of your chair, arms straight.  Bend and lower your body then push back up again.  This will work the back of your arms.

It gets a lot harder for me to function when the weather gets warm and sticky.  I did my exercise at home today instead of going to the gym.  I did stretches, push ups, abs, and triceps.  No matter how I feel I got to do some exercise.  I didn't eat much since I didn't do a lot today.  But I always eat something.  I had a protein shake in the morning then salad for lunch.  It's important to calculate how much to eat so you don't over eat.

I'll try not to wait so long before I post the next exercise.