Variations of exercises are very important. Each time you vary any exercise, from a biceps curve to a squat, You get off a little plateau and work out new muscle fibers of muscle fibers in a new angle. I will not get into the biomechanics of this. You can consult a textbook. You can also try it for yourself and see how it feels. Here are three examples:
1. Biceps curls - Do some while curving your wrists outward. See what new part of your biceps muscles are targeted. Do not forget to stretch before and after. This can be done by putting your arm shoulder level or one inch higher with your thumb against the wall and moving your body away from your arm. Hold for at least three seconds.
2. Push-ups using medicine ball. Hold medicine balls while you do push-ups. This makes the exercise more difficult since you have to work on stabilizing the balls. Now try just one ball at the time. This varies the pectoral and oblique muscle fibers used. Don't forget to stretch before and after: hold your arms behind your chest and grasp your hands together. Stick your chest out. Hold for at least three seconds.
3. Leg extensions - This is for your quadriceps. Try pointing your toes in or out and doing the repetitions. This varies quadriceps muscle fibers used. Don't forget to stretch before and after: hold each leg ankle behind you one at a time). Hold for at least three seconds.
Don't forget to check out www.louizapatsis.com! Thanks to all of you that have given me great comments. Tell people about my books on my web site for Christmas!
Disclaimer: Information on this blog is posted for information purposes, not as a substitute for professional medical advice.