At times you may want to take your camera off the tripod so that you can incorporate moving shots. One way of getting really great movement is by using a glidecam stabilizer. Many people who use the glidecam complain that their arm and back get sore after using it. I agree, it can take a toll on your arm if you do not have a vest (which will distribute the glidecam weight). If you are flying your camera without a vest there are some exercises you can benefit from doing. There are more than just the following I listed, but these exercises are a beginning. You need to workout your legs, arms, back and core. After you have strengthen these muscle groups, you may be able to operate the glidecam for longer periods of time, I know I have.
Lower back strengthening exercises without weights
Lay on front of stomach. Raise both arms and legs simultaneously. Pause for a second at the top before relaxing back to the starting position
Contralateral Limb Raises
Begin on your belly with your arms extended in front of your head. Squeeze your lower back to raise your left arm and right leg about 6 inches off the ground at the same time. Lower them back to the ground and raise your right arm and left leg
Stronger core exercises without weights
Lie face down on the floor with feet together and forearms on the ground. Draw abs in and tighten glutes. Lift entire body off the ground until it forms a straight line from head to toe, resting on forearms and toes. Hold. Slowly return body to the ground, keeping chin tucked and back flat
Lying flat on the ground with knees bent and hands behind the head, push lower back into the ground and lift upper back off the ground and slightly forward
Inner barbell curls: This excesses will strengthen your forearms
Barbell or dumbbell curls: By doing these, you will build strength in your bicep
Works out the glutes and the hamstrings of the posterior thigh. It also works out the lower-back and calf muscles.
Machine leg press
Works out the front of your leg, the quadriceps