Comparisons of Land-Based and Aquatic-Based Plyometric Programs during an 8-Week Training Period

2002 ◽  
Vol 11 (4) ◽  
pp. 268-283 ◽  
Author(s):  
Michael G. Miller ◽  
David C. Berry ◽  
Susan Bullard ◽  
Roger Gilders
Keyword(s):  
Outcome Measures ◽  
Muscle Soreness ◽  
Muscle Power ◽  
Plantar Flexion ◽  
Sport Performance ◽  
Analysis Of Covariance ◽  
Training Period ◽  
Plyometric Training ◽  
Performance Variables ◽  
Before And After

Context:Land and aquatic plyometrics have clinical relevance for exercise, sport performance, and rehabilitation, yet study is limited comparing both.Objective:To compare the effects of land-based and aquatic-based plyometric-training programs on performance variables, muscle soreness, and range of motion (ROM).Setting:Aquatic facility and biomechanics laboratory.Subjects:Forty subjects randomly assigned to 3 groups: land (n = 13), water (n = 13), and control (n = 14).Main Outcome Measures:Performance variables, muscle soreness, and ROM were measured before and after an 8-week training period. An analysis of covariance (ANCOVA) and a Bonferroni post hoc test determined significance.Results:ANCOVA revealed significant differences between groups with respect to plantar-flexion ROM (P< .05). Pairedttest determined that the aquatic group significantly increased muscle power pretest to posttest (P< .05).Conclusions:Results indicate that aquatic plyometric training can be an alternative approach to enhancing performance.

Vitamin D Supplementation and Physical Performance in Adolescent Swimmers

2015 ◽  
Vol 25 (4) ◽  
pp. 317-325 ◽  
Author(s):  
Gal Dubnov-Raz ◽  
Netachen Livne ◽  
Raanan Raz ◽  
Avner H. Cohen ◽  
Naama W. Constantini
Keyword(s):  
Vitamin D ◽  
Physical Performance ◽  
Swimming Performance ◽  
Vitamin D Insufficiency ◽  
Sport Performance ◽  
Vitamin D Supplementation ◽  
Performance Variables ◽  
Hydroxyvitamin D ◽  
Before And After ◽  
25 Hydroxyvitamin D

It is hypothesized that vitamin D insufficiency in athletes might negatively affect sport performance. The objective of this study was to examine the effect of vitamin D3 supplementation on physical performance of adolescent swimmers with vitamin D insufficiency. Fifty-three adolescent competitive swimmers with vitamin D insufficiency (serum 25-hydroxyvitamin-D concentrations (25(OH)D)<30ng/ml, mean 24.2 ± 4.8ng/ml) were randomized to receive 2,000IU/day of vitamin D3 or placebo for 12 weeks. Swimming performance at several speeds, arm-grip strength, and one-legged balance, were measured before and after supplementation. The age-adjusted changes in performance variables during the study were compared between groups. 25(OH) D concentrations at study end were significantly higher in the vitamin group compared with the placebo group (29.6 ± 6.5ng/ml vs. 20.3 ± 4.2ng/ml, p < .001), yet only 48% of the vitamin group became vitamin D sufficient with this dosing. No between-group differences were found in the changes of the performance variables tested. No significant differences in performance were found between participants that became vitamin D sufficient, and those who did not. No significant correlation was found between the change in serum 25(OH)D and ageadjusted balance, strength or swimming performance at study end. Vitamin D3 supplementation that raised serum 25(OH)D concentrations by a mean of 9.3ng/ml above placebo in adolescent swimmers with vitamin D insufficiency, did not improve physical performance more than placebo.

Effectiveness of Ginger Root (Zingiber officinale) on Running-Induced Muscle Soreness and Function: A Pilot Study

2015 ◽  
Vol 20 (6) ◽  
pp. 44-50 ◽  
Author(s):  
Patrick B. Wilson ◽  
John S. Fitzgerald ◽  
Gregory S. Rhodes ◽  
Chris J. Lundstrom ◽  
Stacy J. Ingraham
Keyword(s):  
Endurance Training ◽  
Outcome Measures ◽  
Muscle Function ◽  
Muscle Soreness ◽  
Average Rate ◽  
Controlled Trial ◽  
Zingiber Officinale ◽  
Peak Force ◽  
Analysis Of Covariance ◽  
Long Distance

Context:Analgesics are commonly used by individuals undertaking endurance training; unfortunately, many commonly-used analgesics cause significant adverse effects. Ginger root (Zingiber officinale) has been used effectively as an analgesic in several contexts, but to date, no research is available to evaluate ginger root’s effects in the context of endurance training.Objective:Determine whether ginger root supplementation reduces muscle soreness and prevents impairments in muscle function following a long-distance training run.Design:Randomized, double-blind, placebo-controlled trial.Setting:University marathon training course.Participants:Twenty college students (n = 8 for ginger root group and n = 12 for placebo group).Intervention:Supplementation with 2.2 g·day–1 of ginger root or placebo for three days before, the day of, and the day after a 20–22 mile training run.Main Outcome Measures:Four days before and 24-hr postrun, participants rated soreness on a 100-mm visual analog scale, while vertical jump (VJ), peak force, and average rate of force development (RFD) were assessed during a squat jump. Quade’s rank analysis of covariance was used to assess between-group differences.Results:Median (range) soreness during jogging at 24-hr postrun was lower with ginger root supplementation (37 mm, 15–58) compared with placebo (62 mm, 6–85) (F = 4.6, p = .04). No significant differences for VJ, peak force, and RFD were found between groups.Conclusions:Ginger root may modestly reduce muscle soreness stemming from long-distance running, although it may have little to no effect on measures of muscle function during a VJ. Future studies should explore the mechanisms responsible for reductions in running-induced muscle soreness, as well as evaluate the benefit-to-risk profile of ginger root in the context of endurance training.

The Effect of Shoulder Plyometric Training on Amortization Time and Upper-Extremity Kinematics

2016 ◽  
Vol 25 (4) ◽  
pp. 315-323 ◽  
Author(s):  
Kathleen A. Swanik ◽  
Stephen J. Thomas ◽  
Aaron H. Struminger ◽  
Kellie C. Huxel Bliven ◽  
John D. Kelly ◽  
...  
Keyword(s):  
Strength Training ◽  
Upper Extremity ◽  
Internal Rotation ◽  
Outcome Measures ◽  
Injury Risk ◽  
External Rotation ◽  
Tracking System ◽  
Training Group ◽  
Plyometric Training ◽  
Before And After

Context:Plyometric training is credited with providing benefits in performance and dynamic restraint. However, limited prospective data exist quantifying kinematic adaptations such as amortization time, glenohumeral rotation, and scapulothoracic position, which may underlie the efficacy of plyometric training for upper-extremity rehabilitation or performance enhancement.Objective:To measure upper-extremity kinematics and plyometric phase times before and after an 8-wk upper-extremity strength- and plyometric-training program.Design:Randomized pretest–posttest design.Setting:Research laboratory.Participants:40 recreationally active men (plyometric group, age 20.43 ± 1.40 y, height 180.00 ± 8.80 cm, weight 73.07 ± 7.21 kg; strength group, age 21.95 ± 3.40 y, height 173.98 ± 11.91 cm, weight 74.79 ± 13.55 kg).Intervention:Participants were randomly assigned to either a strength-training group or a strength- and plyometric-training group. Each participant performed the assigned training for 8 wk.Main Outcome Measures:Dynamic and static glenohumeral and scapular-rotation measurements were taken before and after the training programs. Dynamic measurement of scapular rotation and time spent in each plyometric phase (concentric, eccentric, and amortization) during a ball-toss exercise were recorded while the subjects were fitted with an electromagnetic tracking system. Static measures included scapular upward rotation at 3 different glenohumeral-abduction angles, glenohumeral internal rotation, and glenohumeral external rotation.Results:Posttesting showed that both groups significantly decreased the time spent in the amortization, concentric, and eccentric phases of a ball-toss exercise (P < .01). Both groups also exhibited significantly decreased static external rotation and increased dynamic scapular upward rotation after the training period (P < .01). The only difference between the training protocols was that the plyometric-training group exhibited an increase in internal rotation that was not present in the strength-training group (P < .01).Conclusion:These findings support the use of both upper-extremity plyometrics and strength training for reducing commonly identified upper-extremity-injury risk factors and improving upper-extremity performance.

Effect of Plyometric Training on Strength Endurance of Male Hostel Students

Think India ◽  
2019 ◽  
Vol 22 (2) ◽  
pp. 353-357
Author(s):  
Mary Varghese Kundukulam
Keyword(s):  
Young Male ◽  
Analysis Of Covariance ◽  
Male Students ◽  
Training Period ◽  
Control Group ◽  
Plyometric Training ◽  
Criterion Variable ◽  
Statistical Tool ◽  
Group I ◽  
Abdominal Strength

The purpose of the present study was to find out the effect of plyometric training on strength endurance of young male hostel students. To achieve the purpose twenty (n = 20) young male students were selected as subjects and their age ranged between 18 and 25 years. They were divided into two equal groups, each group consisted of ten (n = 10) subjects. The group I underwent plyometric training (PTG), and group II acted as a control (CG) who did not exposed any special training apart from their regular activities. The training period for this study was limited to five days in a week for eight weeks. Abdominal strength endurance was selected as a criterion variable of this study and it was measured by using bent knee sit-ups. The analysis of covariance (ANCOVA) was applied as a statistical tool. In all cases 0.05 level of confidence was fixed to test the significance, which was considered as an appropriate. It was concluded from the result of the study that there was a significant improvement (p ≤ 0.05) due to plyometric training on abdominal strength endurance as compared to control group.

Delayed-Onset Muscle Soreness Does Not Alter the Kinematics and Kinetics of the Squat-Lifting Technique

2001 ◽  
Vol 10 (3) ◽  
pp. 184-195
Author(s):  
Benjamin D. Armstrong ◽  
Mitchell L. Cordova ◽  
Christopher D. Ingersoll ◽  
Nancy F. Lawrence
Keyword(s):  
Range Of Motion ◽  
Outcome Measures ◽  
Repeated Measures ◽  
Muscle Soreness ◽  
Sagittal Plane ◽  
Delayed Onset Muscle Soreness ◽  
Delayed Onset ◽  
Lifting Technique ◽  
Before And After ◽  
Squat Lifting

Context:Little research has been done evaluating the effects of muscle soreness on a lifting task.Objective:To examine the effects of delayed-onset muscle soreness (DOMS) in the thigh musculature on kinematic and kinetic variables associated with the squat-lifting technique.Design:Pretest–posttest repeated measures, with treatment as the independent variable (DOMS and no DOMS of the thigh musculature).Setting:Research laboratory.Participants:Twenty healthy college students.Intervention:Subjects were videotaped lifting a 157-N crate before and after DOMS inducement.Main Outcome Measures:A 2-dimensional sagittal-plane video analysis was used to calculate 7 kinematic and kinetic variables.Results:DOMS had no effect on L5/S1 torque and shear or compression, hip torque and range of motion, or knee torque and range of motion during lifting.Conclusions:DOMS does not appear to alter kinematic and kinetic variables associated with the squat-lifting technique.

Effects of a 6-Week Straw Phonation in Water Exercise Program on the Aging Voice

2020 ◽  
Vol 63 (4) ◽  
pp. 1018-1032
Author(s):  
Chia-Hsin Wu ◽  
Roger W. Chan
Keyword(s):  
Acoustic Analysis ◽  
Vocal Tract ◽  
Exercise Program ◽  
Analysis Of Covariance ◽  
Elderly Subjects ◽  
Control Group ◽  
Perceptual Evaluation ◽  
Positive Effects ◽  
Aging Voice ◽  
Before And After

Purpose Semi-occluded vocal tract (SOVT) exercises with tubes or straws have been widely used for a variety of voice disorders. Yet, the effects of longer periods of SOVT exercises (lasting for weeks) on the aging voice are not well understood. This study investigated the effects of a 6-week straw phonation in water (SPW) exercise program. Method Thirty-seven elderly subjects with self-perceived voice problems were assigned into two groups: (a) SPW exercises with six weekly sessions and home practice (experimental group) and (b) vocal hygiene education (control group). Before and after intervention (2 weeks after the completion of the exercise program), acoustic analysis, auditory–perceptual evaluation, and self-assessment of vocal impairment were conducted. Results Analysis of covariance revealed significant differences between the two groups in smoothed cepstral peak prominence measures, harmonics-to-noise ratio, the auditory–perceptual parameter of breathiness, and Voice Handicap Index-10 scores postintervention. No significant differences between the two groups were found for other measures. Conclusions Our results supported the positive effects of SOVT exercises for the aging voice, with a 6-week SPW exercise program being a clinical option. Future studies should involve long-term follow-up and additional outcome measures to better understand the efficacy of SOVT exercises, particularly SPW exercises, for the aging voice.

Adipokines as Potential Biomarkers in the Neurorehabilitation of Obese Stroke Patients

2020 ◽  
Vol 17 (4) ◽  
pp. 437-445
Author(s):  
Irene Ciancarelli ◽  
Giovanni Morone ◽  
Marco Iosa ◽  
Stefano Paolucci ◽  
Loris Pignolo ◽  
...  
Keyword(s):  
Outcome Measures ◽  
Functional Recovery ◽  
Functional Independence Measure ◽  
Functional Independence ◽  
Enzyme Linked Immunosorbent Assay ◽  
Stroke Patients ◽  
Rehabilitation Outcomes ◽  
Before And After ◽  
Forward Stepwise ◽  
Clinical Measures

Background: Limited studies concern the influence of obesity-induced dysregulation of adipokines in functional recovery after stroke neurorehabilitation. Objective: To investigate the relationship between serum leptin, resistin, and adiponectin and functional recovery before and after neurorehabilitation of obese stroke patients. The adipokine potential significance as prognostic markers of rehabilitation outcomes was also verified. Methods: Twenty obese post-acute stroke patients before and after neurorehabilitation and thirteen obese volunteers without-stroke, as controls, were examined. Adipokines were determined by commercially available enzyme-linked immunosorbent assay (ELISA) kits. Functional deficits were assessed before and after neurorehabilitation with the Barthel Index (BI), modified Rankin Scale (mRS), and Functional Independence Measure (FIM). Results: Compared to controls, higher leptin and resistin values and lower adiponectin values were observed in stroke patients before neurorehabilitation and no correlations were found between adipokines and clinical outcome measures. Neurorehabilitation was associated with improved scores of BI, mRS, and FIM. After neurorehabilitation, decreased values of Body Mass Index (BMI) and resistin together increased adiponectin were detected in stroke patients, while leptin decreased but not statistically. Comparing adipokine values assessed before neurorehabilitation with the outcome measures after neurorehabilitation, correlations were observed for leptin with BI-score, mRS-score, and FIM-score. No other adipokine levels nor BMI assessed before neurorehabilitation correlated with the clinical measures after neurorehabilitation. The forward stepwise regression analysis identified leptin as prognostic factor for BI, mRS, and FIM. Conclusions: Our data show the effectiveness of neurorehabilitation in modulating adipokines levels and suggest that leptin could assume the significance of biomarker of functional recovery.

Improvement in Total and Face-to-Face Provider Time in a Multidisciplinary Craniofacial Team Clinic: An Interventional Study

2021 ◽  
pp. 105566562110217
Author(s):  
Alexis C. Wood ◽  
C. Alejandra Garcia de Mitchell ◽  
Ruchi Kaushik
Keyword(s):  
Data Collection ◽  
Cleft Palate ◽  
Outcome Measures ◽  
Clinic Visit ◽  
Visit Time ◽  
Time Data ◽  
Interventional Study ◽  
Face To Face ◽  
Before And After ◽  
Total Visit

Objective: Identify factors contributing to time a family spends in a Multidisciplinary Craniofacial Team Clinic (MDCT) and implement an intervention to reduce this time. Design: Interventional: a restructuring of clinics to serve those patients requiring fewer provider encounters separately. Setting: An American Cleft Palate-Craniofacial Association-accredited MDCT in an academic children’s hospital. Patients/Participants: One hundred sixty-seven patients with craniofacial diagnoses. Interventions: Time data were tabulated over ∼2 years. Following 9 months of data collection, patients requiring fewer provider encounters were scheduled to a separate clinic serving children with craniosynostosis, and data were collected in the same fashion for another 14 months. Main Outcome Measures: Principal outcome measures included total visit time and proportion of the visit spent without a provider in the room before and after clinic restructuring. Results: The average time spent by family in a clinic session was 161.53 minutes, of which 64.3% was spent without a provider in the room. Prior to clinic restructuring, a greater number of provider encounters was inversely associated with percentage of time spent without a provider ( P < .001). Upon identifying this predictor, scheduling patients who needed fewer provider encounters to a Craniosynostosis Clinic session resulted in reduction in absolute and percentage of time spent without a provider ( P < .001). Conclusions: The number of provider encounters is a significant predictor of the proportion of a clinic visit spent without a provider. Clinic restructuring to remove patient visits that comprise fewer provider encounters resulted in a greater percentage of time spent with a provider in an MDCT.

scholarly journals Use of connected digital products in clinical research following the COVID-19 pandemic: a comprehensive analysis of clinical trials

BMJ Open ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. e047341
Author(s):  
Caroline Marra ◽  
William J Gordon ◽  
Ariel Dora Stern
Keyword(s):  
Clinical Trials ◽  
Clinical Research ◽  
Outcome Measures ◽  
Remote Monitoring ◽  
Search Algorithm ◽  
Primary Outcome Measure ◽  
Secondary Outcome ◽  
Digital Products ◽  
Clinical Trial Registry ◽  
Before And After

ObjectivesIn an effort to mitigate COVID-19 related challenges for clinical research, the US Food and Drug Administration (FDA) issued new guidance for the conduct of ‘virtual’ clinical trials in late March 2020. This study documents trends in the use of connected digital products (CDPs), tools that enable remote patient monitoring and telehealth consultation, in clinical trials both before and after the onset of the pandemic.DesignWe applied a comprehensive text search algorithm to clinical trial registry data to identify trials that use CDPs for remote monitoring or telehealth. We compared CDP use in the months before and after the issuance of FDA guidance facilitating virtual clinical trials.SettingAll trials registered on ClinicalTrials.gov with start dates from May 2019 through February 2021.Outcome measuresThe primary outcome measure was the overall percentage of CDP use in clinical trials started in the 10 months prior to the pandemic onset (May 2019–February 2020) compared with the 10 months following (May 2020–February 2021). Secondary outcome measures included CDP usage by trial type (interventional, observational), funder type (industry, non-industry) and diagnoses (COVID-19 or non-COVID-19 participants).ResultsCDP usage in clinical trials increased by only 1.65 percentage points, from 14.19% (n=23 473) of all trials initiated in the 10 months prior to the pandemic onset to 15.84% (n=26 009) of those started in the 10 months following (p<0.01). The increase occurred primarily in observational studies and non-industry funded trials and was driven entirely by CDP usage in trials for COVID-19.ConclusionsThese findings suggest that in the short-term, new options created by regulatory guidance to stimulate telehealth and remote monitoring were not widely incorporated into clinical research. In the months immediately following the pandemic onset, CDP adoption increased primarily in observational and non-industry funded studies where virtual protocols are likely medically necessary due to the participants’ COVID-19 diagnosis.

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