Push ups are a great exercise, but you have to be inventive at times to increase the intensity of the exercise.
Another variation of the classic push up is known as the walking push up.
This exercise can be very difficult and you will find it works most, if not all, of your body at once.
If you have wooden floors, grab an old towel.
If you have carpet, get a piece of cardboard approximately one foot square.
Assume the standard push up position and place your feet on the towel or cardboard.
Walk with your hands four steps forward.
You will notice that your core and legs must really engage to move forward.
This also really works your shoulders.
Make sure your shoulders, butt and feet stay in a straight line.
Keeping good form in this exercise will help you reap the most benefits.
Once you have walked forward four steps, perform five to ten push ups.
After completing the push ups, walk back four steps to the starting position and perform five more push ups.
You have just completed one series.
Keep performing this series for a total of one minute.
You could alter different aspects of the series if you feel it is too difficult or you have mastered this exercise.
If it is too difficult, shorten the number of steps you have to walk, lessen the number of push ups between and shorten the total time to perform the series.
If you feel you have mastered the series, then increase the number of steps, add to the number of push ups and lengthen the time allotted for the series.
Playing with the different factors will help you create the best walking push ups series for you and your fitness level.
I hope this helps you reach your fitness goals!