Annette Karim - Academia.edu (original) (raw)

Papers by Annette Karim

Research paper thumbnail of Running biomechanical and isokinetic strength differences in masters runners with and without Achilles tendinopathy

Sports biomechanics, Jul 1, 2024

Research paper thumbnail of Use of whole body vibration to enhance performance in dancers

Research paper thumbnail of Inter-rater reliability of a musculoskeletal screen as administered to female professional contemporary dancers

Work (Reading, Mass.), 2011

The purpose of this study is to determine the inter-rater reliability of commonly used musculoske... more The purpose of this study is to determine the inter-rater reliability of commonly used musculoskeletal screening components in a population of contemporary professional dancers. Study participants were 30 women from six contemporary dance companies between the ages of 18 and 32, with a mean age of 24, and Body Mass Index of 22.4. 101 items were assessed in the categories of Static Posture, the Beighton 9-Point Hypermobility Test, Flexibility, Strength, and Dynamic Posture, based upon the Pilot 2006 Dance USA Annual Post-Hire Health Screen for Professional Dancers. Testing was non-ordered, using 2 of the 4 available testers, with variable assignment of the lead tester. High percent agreement was found for the subcategories of hallux valgus, pelvic tilt, and forefoot alignment, flexor hallucis, iliopsoas, hip internal rotation flexed, external rotation extended, and soleus extensibility, composite Beighton, and for most measures within the dynamic posture category. Low to moderate per...

Research paper thumbnail of Whole Body Vibration: The Effect of Position and Frequency on Perceived Exertion in Healthy, Active Adults

J. of Health Science, 2019

Whole Body Vibration (WBV) is a new exercise trend in fitness and performance enhancement. WBV pl... more Whole Body Vibration (WBV) is a new exercise trend in fitness and performance enhancement. WBV platforms oscillate over a range of frequencies and amplitudes; however no study to date has examined the experience of perceived exertion with differences in vibration frequency and static or dynamic body position, nor examined the difference between sexes based on position and frequency during WBV. The purpose of this study was to assess the effects of position and frequency on perceived exertion during WBV in healthy, active adults. A convenience sample of 39 healthy young adults who participated in moderated exercise was blinded and randomly allocated to six WBV conditions composed of different frequency and position combinations. The participants received instruction, provided informed consent, participated in a warm-up session, and then reported rating of perceived exertion for each WBV condition. A 2×3 within-subjects multivariate approach ANOVA was conducted against an alpha of 0.05. A statistically significant main effect of position (p = 0.004) and significant main effect of frequency (p = 0.025) were found. Significant marginal means were found between the frequencies of 0 Hz and 50 Hz (p = 0.007). Statistically significant differences were found between sexes for all combinations.

Research paper thumbnail of Immediate Effect of Whole Body Vibration on Sauté Height and Balance in Female Professional Contemporary Dancers A Randomized Controlled Trial

Journal of Dance Medicine & Science

This randomized controlled trial examined the immediate effect of whole body vibration (WBV) on f... more This randomized controlled trial examined the immediate effect of whole body vibration (WBV) on first position sauté height, and on static and dynamic balance, in 59 female professional contemporary dancers. Following instruction, a warm-up, and a training session, participants received a 75-second randomly assigned WBV intervention under four conditions: static demi-plié (0 Hz), static demi-plié (30 Hz), dynamic demi-plié (0 Hz), and dynamic demi-plié (30 Hz). Before and immediately after intervention, participants performed three sautés on the Just Jump® Mat System, provided dynamic balance data via the Star Excursion Balance Test, and static balance data via the Balance Error Scoring System. A two-way split-plot multivariate approach ANOVA was used to analyze sauté height (α = 0.025). Balance was examined with a 4 x 2 x 2 split-plot MANOVA (α = 0.025). Follow-up two-way split plot multivariate approach ANOVAs were also conducted (α = 0.0125). Dancers from the static first position demi-plié group were found to jump higher than those from the dynamic first position demi-plié group, regardless of WBV frequency (p = 0.001). The 30 Hz frequency resulted in significantly improved static balance (p = 0.001) for both static and dynamic demi-plié. Therefore, the use of WBV is worthy of consideration as a quick method of improving static balance, and use of the static first position demi-plié may be beneficial for improving sauté height.

Research paper thumbnail of Assessment of Countermovement Jump Performance in First Position (Sauté) in Healthy Adults

Sports Health: A Multidisciplinary Approach

Background: Prior studies have examined muscle power via the countermovement jump (CMJ). Studies ... more Background: Prior studies have examined muscle power via the countermovement jump (CMJ). Studies to date have examined neither the reliability nor the construct validity of the ballet first position CMJ (hips in lateral rotation, toes facing away from one another, legs straight) as a measure of power. Hypotheses: There would be (1) good interrater reliability in the visual assessment of the best-quality first position CMJ (κ ≥ 0.60), (2) good test-retest reliability in the height of the first position CMJ of good quality (intraclass correlation coefficient [ICC] ≥ 0.80), and (3) a significant relationship between isokinetic torque of the quadriceps femoris and first position CMJ height ( r ≥ 0.40). Study Design: Correlational study. Level of Evidence: Level 3. Methods: A convenience sample of 39 healthy young adults who reported moderate activity levels participated in a warm-up and 2 sessions of 6 jumps. Quadriceps femoris isokinetic torque was measured in the first session. Result...

Research paper thumbnail of Running biomechanical and isokinetic strength differences in masters runners with and without Achilles tendinopathy

Sports biomechanics, Jul 1, 2024

Research paper thumbnail of Use of whole body vibration to enhance performance in dancers

Research paper thumbnail of Inter-rater reliability of a musculoskeletal screen as administered to female professional contemporary dancers

Work (Reading, Mass.), 2011

The purpose of this study is to determine the inter-rater reliability of commonly used musculoske... more The purpose of this study is to determine the inter-rater reliability of commonly used musculoskeletal screening components in a population of contemporary professional dancers. Study participants were 30 women from six contemporary dance companies between the ages of 18 and 32, with a mean age of 24, and Body Mass Index of 22.4. 101 items were assessed in the categories of Static Posture, the Beighton 9-Point Hypermobility Test, Flexibility, Strength, and Dynamic Posture, based upon the Pilot 2006 Dance USA Annual Post-Hire Health Screen for Professional Dancers. Testing was non-ordered, using 2 of the 4 available testers, with variable assignment of the lead tester. High percent agreement was found for the subcategories of hallux valgus, pelvic tilt, and forefoot alignment, flexor hallucis, iliopsoas, hip internal rotation flexed, external rotation extended, and soleus extensibility, composite Beighton, and for most measures within the dynamic posture category. Low to moderate per...

Research paper thumbnail of Whole Body Vibration: The Effect of Position and Frequency on Perceived Exertion in Healthy, Active Adults

J. of Health Science, 2019

Whole Body Vibration (WBV) is a new exercise trend in fitness and performance enhancement. WBV pl... more Whole Body Vibration (WBV) is a new exercise trend in fitness and performance enhancement. WBV platforms oscillate over a range of frequencies and amplitudes; however no study to date has examined the experience of perceived exertion with differences in vibration frequency and static or dynamic body position, nor examined the difference between sexes based on position and frequency during WBV. The purpose of this study was to assess the effects of position and frequency on perceived exertion during WBV in healthy, active adults. A convenience sample of 39 healthy young adults who participated in moderated exercise was blinded and randomly allocated to six WBV conditions composed of different frequency and position combinations. The participants received instruction, provided informed consent, participated in a warm-up session, and then reported rating of perceived exertion for each WBV condition. A 2×3 within-subjects multivariate approach ANOVA was conducted against an alpha of 0.05. A statistically significant main effect of position (p = 0.004) and significant main effect of frequency (p = 0.025) were found. Significant marginal means were found between the frequencies of 0 Hz and 50 Hz (p = 0.007). Statistically significant differences were found between sexes for all combinations.

Research paper thumbnail of Immediate Effect of Whole Body Vibration on Sauté Height and Balance in Female Professional Contemporary Dancers A Randomized Controlled Trial

Journal of Dance Medicine & Science

This randomized controlled trial examined the immediate effect of whole body vibration (WBV) on f... more This randomized controlled trial examined the immediate effect of whole body vibration (WBV) on first position sauté height, and on static and dynamic balance, in 59 female professional contemporary dancers. Following instruction, a warm-up, and a training session, participants received a 75-second randomly assigned WBV intervention under four conditions: static demi-plié (0 Hz), static demi-plié (30 Hz), dynamic demi-plié (0 Hz), and dynamic demi-plié (30 Hz). Before and immediately after intervention, participants performed three sautés on the Just Jump® Mat System, provided dynamic balance data via the Star Excursion Balance Test, and static balance data via the Balance Error Scoring System. A two-way split-plot multivariate approach ANOVA was used to analyze sauté height (α = 0.025). Balance was examined with a 4 x 2 x 2 split-plot MANOVA (α = 0.025). Follow-up two-way split plot multivariate approach ANOVAs were also conducted (α = 0.0125). Dancers from the static first position demi-plié group were found to jump higher than those from the dynamic first position demi-plié group, regardless of WBV frequency (p = 0.001). The 30 Hz frequency resulted in significantly improved static balance (p = 0.001) for both static and dynamic demi-plié. Therefore, the use of WBV is worthy of consideration as a quick method of improving static balance, and use of the static first position demi-plié may be beneficial for improving sauté height.

Research paper thumbnail of Assessment of Countermovement Jump Performance in First Position (Sauté) in Healthy Adults

Sports Health: A Multidisciplinary Approach

Background: Prior studies have examined muscle power via the countermovement jump (CMJ). Studies ... more Background: Prior studies have examined muscle power via the countermovement jump (CMJ). Studies to date have examined neither the reliability nor the construct validity of the ballet first position CMJ (hips in lateral rotation, toes facing away from one another, legs straight) as a measure of power. Hypotheses: There would be (1) good interrater reliability in the visual assessment of the best-quality first position CMJ (κ ≥ 0.60), (2) good test-retest reliability in the height of the first position CMJ of good quality (intraclass correlation coefficient [ICC] ≥ 0.80), and (3) a significant relationship between isokinetic torque of the quadriceps femoris and first position CMJ height ( r ≥ 0.40). Study Design: Correlational study. Level of Evidence: Level 3. Methods: A convenience sample of 39 healthy young adults who reported moderate activity levels participated in a warm-up and 2 sessions of 6 jumps. Quadriceps femoris isokinetic torque was measured in the first session. Result...