1.Golf Swing Rotational Velocity: The Essential Follow-Through.
Katherine M STEELE ; Eugene Y ROH ; Gordhan MAHTANI ; David W MEISTER ; Amy L LADD ; Jessica ROSE
Annals of Rehabilitation Medicine 2018;42(5):713-721
OBJECTIVE: To evaluate if shoulder and pelvic angular velocities differ at impact or peak magnitude between professional and amateur golfers. Golf swing rotational biomechanics are a key determinant of power generation, driving distance, and injury prevention. We hypothesize that shoulder and pelvic angular velocities would be highly consistent in professionals. METHODS: Rotational velocities of the upper-torso and pelvis throughout the golf swing and in relation to phases of the golf swing were examined in 11 professionals and compared to 5 amateurs using three-dimensional motion analysis. RESULTS: Peak rotational velocities of professionals were highly consistent, demonstrating low variability (coefficient of variation [COV]), particularly upper-torso rotational velocity (COV=0.086) and pelvic rotational velocity (COV=0.079) during down swing. Peak upper-torso rotational velocity and peak X-prime, the relative rotational velocity of uppertorso versus pelvis, occurred after impact in follow-through, were reduced in amateurs compared to professionals (p=0.005 and p=0.005, respectively) and differentiated professionals from most (4/5) amateurs. In contrast, peak pelvic rotational velocity occurred in down swing. Pelvic velocity at impact was reduced in amateurs compared to professionals (p=0.019) and differentiated professionals from most (4/5) amateurs. CONCLUSION: Golf swing rotational velocity of professionals was consistent in pattern and magnitude, offering benchmarks for amateurs. Understanding golf swing rotational biomechanics can guide swing modifications to help optimize performance and prevent injury.
Back Pain
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Benchmarking
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Golf*
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Pelvis
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Shoulder
2.Comparison of Spontaneous Motor Tempo during Finger Tapping, Toe Tapping and Stepping on the Spot in People with and without Parkinson’s Disease
Dawn ROSE ; Daniel J. CAMERON ; Peter J. LOVATT ; Jessica A. GRAHN ; Lucy E. ANNETT
Journal of Movement Disorders 2020;13(1):47-56
Objective:
Spontaneous motor tempo (SMT), observed in walking, tapping and clapping, tends to occur around 2 Hz. Initiating and controlling movement can be difficult for people with Parkinson’s (PWP), but studies have not identified whether PWP differ from controls in SMT. For community-based interventions, e.g. dancing, it would be helpful to know a baseline SMT to optimize the tempi of cued activities. Therefore, this study compared finger tapping (FT), toe tapping (TT) and stepping ‘on the spot’ (SS) in PWP and two groups of healthy controls [age-matched controls (AMC) and young healthy controls (YHC)], as SMT is known to change with age.
Methods:
Participants (PWP; n = 30, AMC; n = 23, YHC; n = 35) were asked to tap or step on the spot at a natural pace for two trials lasting 40 seconds. The central 30 seconds were averaged for analyses using mean inter-onset intervals (IOI) and coefficient of variation (CoV) to measure rate and variability respectively.
Results:
PWP had faster SMT than both control groups, depending on the movement modality: FT, F(2, 87) = 7.92, p < 0.01 (PWP faster than YHC); TT, F(2, 87) = 4.89, p = 0.01 (PWP faster than AMC); and SS, F(2, 77) = 3.26, p = 0.04 (PWP faster than AMC). PWP had higher CoV (more variable tapping) than AMC in FT only, F(2, 87) = 4.10, p = 0.02.
Conclusion
This study provides the first direct comparison of SMT between PWP and two control groups for different types of movements. Results suggest SMT is generally faster in PWP than control groups, and more variable when measured with finger tapping compared to stepping on the spot.
3.Antibacterial efficacy of methanolic extract of molave (Vitex parviflora A. Juss) leaves against Streptococcus mutans
Mary Rose A. Hemedes ; Aerol Sedrick A. Mangaliag ; Jessica K. Rebueno Santos
Philippine Journal of Health Research and Development 2022;26(2):1-7
Background:
Antibacterial drugs are used for suppressing harmful bacteria. However, some are reported to have side effects which led researchers to investigate plants with antimicrobial properties as potential alternatives. One such indigenous plant is the Vitex parviflora A. juss, “molave” or “mulawin” tree.
Objective:
This study determined and compared the antibacterial efficacy of 50 mg/ml and 100 mg/ml
concentrations of fresh local molave leaves methanolic extract with 0.12% chlorhexidine, distilled water, and 95% methanol on growth inhibition of S. mutans.
Methodology:
Five hundred grams of fresh molave leaves were collected and subjected to methanolic
extraction. In vitro antimicrobial susceptibility test by disk diffusion of 50 mg/ml and 100 mg/ml molave
extract concentrations, 0.12% chlorhexidine, distilled water, and 95% methanol on 18 Mueller-Hinton agar
(MHA) plates inoculated with S. mutans was done. For cost-efficiency, the total sample size of 80 plates was reduced by placing 5 test groups in one plate divided into five portions done in 18 replicates. After 48 hours of incubation in anaerobic conditions, resulting zones of inhibition were measured. Data were analyzed through one-way ANOVA and Bonferroni tests.
Results:
The mean diameter of inhibition zones produced by 100 mg/ml and 50 mg/ml concentrations of molave methanolic leaves extract and 0.12% chlorhexidine was 15.78 mm, 11.63 mm, and 21.44 mm, respectively. Distilled water and 95% methanol did not inhibit bacterial growth. The 100 mg/ml concentration has stronger antibacterial properties than the 50 mg/ml.
Conclusion
The Vitex parviflora A. Juss methanolic leaves extract has the ability to inhibit the growth of S. mutans in vitro. Both concentrations were relatively weaker compared to chlorhexidine.
Streptococcus mutans
4.The effect of the Elderly Development Program on the quality of life of elderly individuals
Joeric Emil P. Crescini ; Jessica Mara G. Cruz ; John Paul M. Cruz ; Kathleen Rose P. Cruz ; Isabel G. Cupino ; Darwyn Paul Y. Daguman ; Lea Monica A. Dalde ; Allan Vincent F. Datingaling ; Manuel John A. Dayao ; Kelsey C. Dayrit ; Victor L. de Castro III ; Remigio Jay-Ar Z. Butacan IV
Health Sciences Journal 2017;6(2):50-54
Introduction :
The increasing aging population of the Philippines impacts on the socioeconomic
development of the country, prompting a deeper look into their quality of life. This study sought to
determine the effect of the Elderly Development Program on the quality of life of the elderly population
of Los Baños.
Methods :
A 4-month prospective cohort study of the elderly population in Los Baños, Laguna compared
the quality of life scores of a group enrolled in the Elderly Development Program and an unexposed
control, using the World Health Organization Quality of Life Abbreviated Version for Filipino Older
Persons questionnaire.
Results :
Quality of life scores where higher for the EDP group during the four months of observation.
In Month 2, significant differences were found in all domains except for the psychological domain.
Only the physical health domain score was significant in the EDP group for Month 3 (p = 0.003) and
Month 4 (p = 0.029). Both the EDP and control groups had higher overall and domain scores in Month
4 compared with baseline.
Conclusion
The Elderly Development Program may improve the overall quality of life of elderly
persons, specifically in the physical health domain. These improvements are likely due to the focus
of the program on the physical aspect of the elderly.
Aged
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Quality of Life