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New
Reasons to Exercise:
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Better Posture and Greater Height
Wayne L. Westcott, PHD, CSCS
For
the past several decades a rather depressing health statistic has
remained essentially the same, namely, that four out of every five
Americans experience lower back pain and associated effects. While we
are not aware of the corresponding ratio for upper back pain, it is
undoubtedly too high and certainly, based on our observations, a
prominent physical problem that is becoming increasingly more common in
adults of all ages.
Of
course, there are many probable causes for discomfort in the lower back,
upper back and neck areas, and it is unlikely that any simple or single
solution will successfully remediate or prevent all such problems.
Nevertheless, two factors are typically identified as major contributors
to reduced integrity of the spinal column which can clearly lead to pain
and related physical problems. These increasingly common factors, both
associated with sedentary lifestyles, are muscle weakness and poor
posture. Unfortunately, each of these problems adversely affects the
other, as muscle weakness can result from poor posture and poor posture
can result from muscle weakness.
Fifteen years of research from the University of Florida Medical School
has demonstrated that regular strength exercise for the lumbar spine
muscles can significantly reduce or eliminate low back pain in a large
percentage of patients. It is therefore logical to assume that
strengthening the muscles of the upper back and neck may likewise
benefit people who suffer discomfort in these areas of the body. While
there is less research quantifying the relationship between posture and
pain, it is most likely that better posture will produce a corresponding
reduction in spine-related discomfort.
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My
colleague, Scott Worobey MSPT, has a research interest in the forward
head-rounded shoulder posture that has become a common problem often
observed in physical therapy evaluations. According to clinicians, this
faulty posture frequently leads to neck, shoulder and back discomfort.
For example, rounded shoulders may cause mechanical malfunction of the
shoulder joint resulting in tendon impingement, bursitis, and rotator
cuff injury. It is also possible that this posture causes increased
feelings of fatigue due to the greater muscle tension and activation
necessary for support purposes. Rounded shoulders may result in a
kyphotic posture which puts additional pressure on the thoracic spine,
resulting in reduced bone density, micro-factures and loss of height.
Add to these concerns the problems associated with forward head posture.
The forward head position causes the weight of the head (approximately
15-pounds) to pull at the cervical spine, which may lead to muscle
tightness, spasm and chronic tension headaches.
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Research Study
We
designed a study to determine whether a fitness program including
aerobic activity, strength training, stretching exercise and postural
awareness would improve forward head-rounded shoulder posture and
increase standing height.
Thirty-four men and women (average age 45 years) completed the 10-week
posture intervention program, which was conducted twice a week in
six-person exercise classes with two instructors per class. Each class
was one-hour in length and included about 20 minutes of aerobic activity
(stationary cycling and treadmill walking), 20 minutes of strength
training (10 Nautilus machines), and 10 stretching exercises. The
participants performed one set of 8 to 12 repetitions of the following
resistance machine exercises for the major muscle groups. Each strength
exercise was followed by a 20-second static stretch for the muscle group
just worked. For example, the leg extension exercise was followed by a
20-second quadriceps stretch and the leg curl exercise was followed by a
20-second hamstrings stretch.
|
Strength
Exercise/Machine |
Major
Muscles |
At-Machine
Stretch |
|
Leg Extension |
Quadriceps |
Quadriceps
Stretch |
|
Leg Curl |
Hamstrings |
Hamstrings
Stretch |
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Chest Cross/Chest
Press |
Pectoralis Major,
Triceps |
Chest Stretch |
|
Pullover |
Latissimus Dorsi,
Teres Major |
Upper Back
Stretch |
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Lateral Raise |
Deltoids |
Shoulder Stretch |
|
Biceps Curl |
Biceps |
Biceps Stretch |
|
Triceps Extension |
Triceps |
Triceps Stretch |
|
Low Back
Extension |
Erector Spinae |
Lower Back
Stretch |
|
Abdominal Curl |
Rectus Abdominis
|
Abdominal Stretch |
|
Neck
Flexion/Extension |
Neck
Flexors/Extensors |
Neck Stretch |
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In
addition to the basic program of endurance, strength and flexibility
exercise, all of the program participants received relevant information,
verbal cues and positive reinforcement on proper posture. Two specific
stretches for the chest and shoulder muscles were presented by the lead
class instructor who holds a masters degree in physical therapy.
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Assessment Procedures
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All
of the study subjects were assessed before and after the 10-week
training period for changes in body composition (lean weight and fat
weight), as well as for forward head position and standing height. The
participants experienced a 1.5-percent improvement in body composition,
resulting from a 2 1/2-pound gain in lean (muscle) weight and a 3-pound
loss of fat weight. Their forward head position improved by almost 1/2
inch, and their standing height increased by almost 1/4 inch.
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Practical Application
Based
on these findings, the 10-week program of basic endurance, strength and
flexibility exercise is effective for replacing muscle and reducing fat.
When combined with postural awareness training and two specific
stretches for the chest and shoulder muscles, the basic exercise program
is also beneficial for improving functional posture, decreasing forward
head distance and increasing standing height. Written questionnaire
surveys completed by the participants prior to the final assessment
revealed an overwhelmingly positive response to the training program.
Their comments included noticeable improvements in personal posture,
reduced neck and shoulder area discomfort, and less low back pain.
Essentially all of the respondents committed to continued postural
awareness and a regular exercise regimen, therefore indicating that they
perceived the program components to be both physically important and
personally beneficial. Although the long-term outcomes of the posture
intervention program are not known, the short-term effects are clearly
encouraging.
Article Index
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