Technical Note
Kelly Hensler, Barbara J. Norton, Dequan Zou
Physical therapists commonly examine the postural alignment and curvature of the low back region in patients with low back pain, presumably because of an assumed relationship between postural alignment and dysfunction. As an adjunct to visual observation, clinicians may also use a special device to obtain noninvasive measurements of the curvature. Many different devices have been used, but a largely unanswered question is whether the measurements obtained with the various devices can be used interchangeably. Based on the literature, the 2 types of devices that appear to be used most commonly are inclinometers and flexible rulers.
This technical note concludes that regardless of the device used – inclinometer or Metrecom, a microcomputer-interfaced, electromechanical, three-dimensional (3D) digitizer, the results for tangent method measurements were similar. Trigonometric method measurements taken with the Metrecom were larger than tangent method measurements obtained with either the inclinometer or Metrecom. The difference between actual and predicted depth of the curve was a large and significant predictor of the difference between tangent and trigonometric measurements. The use of the trigonometric method with a computer-interfaced digitizer, such as the Metrecom, may be preferable compared to the use of an inclinometer if information about the depth of the curve is of particular importance for either research or clinical purposes. Additional testing is required to generate age- and gender-specific referent values, as well as to assess the sensitivity and specificity of the measures for categorization of spinal conditions.
J Ortho Sports Phys Ther. 2002; 32(8):405-414.
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Research Report
Patrick C. W. Lam, Gabriel Y. F. Ng, Gabriel Y. F. Ng
Study Design: Normative descriptive study.
Objectives: Exploring the isokinetic work ratios of eccentric antagonist/concentric agonist shoulder rotators in the late cocking and deceleration phases of a forehand overhead smash in badminton players. Comparing the work ratios between dominant and nondominant shoulders.
Background: The strength of shoulder muscles for badminton players has been studied but there is little information on the work output of these muscles for a specific range of movement.
Methods and Measures: Twenty-five skilled men who play badminton at club level with a mean age of 29.4 years (SD = 6.1) were measured for concentric and eccentric isokinetic work (joules) of shoulder internal (IR) and external (ER) rotators on both upper extremities at 120°/s. Bilateral isokinetic work ratios for eccentric IR/concentric ER between 60° and 90° of shoulder external rotation were calculated to denote strength profile in the late cocking phase of the badminton smash. Work ratios for eccentric ER/concentric IR between 10° external rotation and 30° internal rotation were calculated to denote strength profile in the deceleration phase of the badminton smash. The respective work ratios were compared between both shoulders.
Result: The eccentric IR/concentric ER work ratios in late cocking were 1.9:1 and 1.3:1 (P = 0.001) for the dominant and nondominant shoulders, respectively. The eccentric ER/concentric IR work ratios in the deceleration phase were 1.1:1 and 1.3:1 (P = 0.003) for the dominant and nondominant shoulders, respectively.
Conclusion: The work ratios of eccentric antagonist/concentric agonist are different between dominant and nondominant shoulders of skilled badminton players. Rehabilitation for injuries of these athletes should aim at developing the optimal antagonist/agonist work ratios to return them to this sport.
J Orthop Sports Phys Ther. 2002; 32(8):399–404.
Key Words: concentric contraction, eccentric contraction, muscle assessment, sports, strength profile
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Research Report
Steven Z. George
Study Design: Prospective case series.
Objectives: The purpose of this case series was to describe the criteria used to determine if patients were to receive slump stretch treatment within a treatment-based classification system and to describe selected symptom characteristics associated with these patients.
Background: Previous reports from the literature suggest that the slump test position may be a useful treatment and evaluation technique. However, little information has been presented regarding how to identify patients who are appropriate to treat with slump stretching and the symptom characteristics associated with these patients.
Methods and Measures: Prior to recruitment, criteria were established to identify patients who would be considered appropriate to treat with slump stretching. Consecutive patients referred with low back diagnosis or low–back-related diagnoses were then evaluated using a treatment-based classification system. Selected symptom characteristics were collected from patients treated with slump stretching.
Results: Out of 88 consecutive patients with low back diagnoses or low–back-related diagnoses, 6 met the study’s inclusion criteria and were treated with slump stretching. All pain diagrams were classified as ‘‘organic’’ or ‘‘possibly organic,’’ and the most common symptom descriptor was ‘‘deep ache.’’ At the discharge session of physical therapy, 5 of 6 patients had symptoms that were more proximally located and all patients reported a decrease in symptom intensity.
Conclusion: Favorable changes in symptom intensity and location were observed for this case series, but definitive conclusions cannot be drawn from this study design. Additional research needs to be completed to determine if the slump test position is an effective evaluation and treatment technique.
J Orthop Sports Phys Ther 2002; 32(8):391–398.
Key Words: classification, slump test, symptoms
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Research Report
Bryan Chock, Matthew Iwamoto, Mindy Kruse, Gary Lentell, Robert Martin, Kasie Wilson
Study Design: Prospective within-subject experimental design using a sample of convenience.
Objectives: To describe cervical foraminal dimensions in vivo of nonimpaired, asymptomatic individuals in a neutral cervical spine position using magnetic resonance images, and then to document dimensional changes of the foramina when placing the neck in a retracted position.
Background: Physical therapists frequently use movement interventions to treat spine dysfunction. The influence of positional changes of the head and neck on the dimensions of the cervical neural foramina is not well documented.
Methods and Measures: Twenty asymptomatic subjects (10 men and 10 women), 22 to 25 years of age (mean ± SD = 23.7 ± 0.8), underwent magnetic resonance imaging of the cervical spine in both neutral and retracted positions. Bilateral measurements were documented in both positions and compared for height, width, and area of each subject’s intervertebral foramen from C2–C3 to C7–T1.
Results: No significant differences (P >0.004) were found between the 2 neck positions. With the single exception of foraminal area at C3–C4, the mean values of height, width, and area in the retracted position were equal to or larger than those of the cervical neutral position.
Conclusions: Therapeutic maneuvers using retraction of the cervical spine do not promote positional stenosis of the intervertebral foramen in the healthy neck.
J Orthop Sports Phys Ther. 2002; 32(8):380–390.
Key Words: cervical retraction, stenosis, therapeutic exercise
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