scholarly journals The ability of a submaximal cycle ergometer test to detect longitudinal changes in VO2max

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Frida Björkman ◽  
Örjan Ekblom ◽  
Elin Ekblom-Bak ◽  
Tony Bohman
Keyword(s):  
Repeated Measures ◽  
Time Span ◽  
Treadmill Running ◽  
Large Individual ◽  
Good Precision ◽  
Repeated Measures Anova ◽  
Longitudinal Changes ◽  
Significant Difference ◽  
Change In Mean

Abstract Background The purpose of the present study was to examine the ability of a submaximal cycling test to detect longitudinal changes in maximal oxygen uptake (VO2max) and examine the conformity between changes in measured and estimated VO2max over a time span of 5–8 years. Methods A total of 35 participants (21 men and 14 women), aged 29 to 63 years, performed the Ekblom-Bak (EB) submaximal cycle test for estimation of VO2max and a maximal treadmill running test for direct measurement of VO2max. The baseline tests were conducted between 2009 and 2012, and the follow-up tests were completed 5 to 8 years later. Pearson’s coefficient of correlation (r) and paired sample t-test were used to analyse the association between change in measured and estimated VO2max. Random and systematic errors between the measured and estimated VO2max were evaluated using Bland-Altman plots. Repeated measures ANOVA were used to test differences between changes over time. Results There was no significant change in mean measured VO2max between baseline and follow-up (p = 0.91), however large individual variations were noted (− 0.78 to 0.61 L/min). The correlation between individual change in measured and estimated VO2max was r = 0.75 (p < 0.05), and the unstandardised B-coefficient from linear regression modelling was 0.88 (95% CI 0.61 to 1.15), i.e., for each litre of change in estimated VO2max, the measured value had changed 0.88 L. The correlation between baseline and follow-up errors (the difference between estimated-measured VO2max at each occasion) was r = 0.84 (p < 0.05). With regard to the testing procedure, repeated measures ANOVA revealed that there was no significant difference between the group who exercised at the same work rates at baseline and follow-up (n = 25), and those who required a change in work rate (n = 10). Conclusions The EB test detected a change in VO2max with reasonably good precision over a time span of 5–8 years. Further studies are needed to evaluate if the test can be used in clinical populations and in subjects with different medications.

scholarly journals The Ability of a Submaximal Cycle Ergometer Test to Detect Longitudinal Changes in VO2Max

2021 ◽  
Author(s):  
Frida Björkman ◽  
Örjan Ekblom ◽  
Elin Ekblom-Bak ◽  
Tony Bohman
Keyword(s):  
Repeated Measures ◽  
Time Span ◽  
Treadmill Running ◽  
Large Individual ◽  
Good Precision ◽  
Repeated Measures Anova ◽  
Longitudinal Changes ◽  
Significant Difference ◽  
Change In Mean

Abstract Background The purpose of the present study was to examine the ability of a submaximal cycling test to detect longitudinal changes in maximal oxygen uptake (VO2max) and examine the conformity between changes in measured and estimated VO2max over a time span of 5–8 years. Methods A total of 35 participants (21 men and 14 women), aged 29 to 63 years, performed the Ekblom-Bak (EB) submaximal cycle test for estimation of VO2max and a maximal treadmill running test for direct measurement of VO2max. The baseline tests were conducted between 2009 and 2012, and the follow-up tests were completed 5 to 8 years later. Pearson’s coefficient of correlation (r) and paired sample t-test were used to analyse the association between change in measured and estimated VO2max. Random and systematic errors between the measured and estimated VO2max were evaluated using Bland-Altman plots. Repeated measures ANOVA were used to test differences between changes over time. Results There was no significant change in mean measured VO2max between baseline and follow-up (p = 0.91), however large individual variations were noted (-0.78 to 0.61 L/min). The correlation between individual change in measured and estimated VO2max was r = 0.75 (p < 0.05), and the unstandardised B-coefficient from linear regression modelling was 0.88 (95% CI: 0.61 to 1.15), i.e., for each litre of change in estimated VO2max, the measured value had changed 0.88 L. The correlation between baseline and follow-up errors (the difference between estimated-measured VO2max at each occasion) was r = 0.84 (p < 0.05). With regard to the testing procedure, repeated measures ANOVA revealed that there was no significant difference between the group who exercised at the same work rates at baseline and follow-up (n = 25), and those who required a change in work rate (n = 10). Conclusion The EB test detected a change in VO2max with reasonably good precision over a time span of 5–8 years. Further studies are needed to evaluate if the test can be used in clinical populations and in subjects with different medications.

scholarly journals Effects of three protocols of hamstring muscle stretching and paravertebral lumbar

2014 ◽  
Vol 27 (1) ◽  
pp. 85-92 ◽  
Author(s):  
Juliana Moesch ◽  
Juliana Schmatz Mallmann ◽  
Flávia Tomé ◽  
Lizyana Vieira ◽  
Rodolfo Tozeto Ciqueleiro ◽  
...  
Keyword(s):  
Repeated Measures ◽  
Activity Level ◽  
Hamstring Muscle ◽  
Significance Level ◽  
Repeated Measures Anova ◽  
Control Stage ◽  
Muscle Stretching ◽  
Significant Difference ◽  
Proprioceptive Neuromuscular Facilitation

Introduction the muscle stretching is widely used to gain extensibility and flexibility, it is important to know the duration of these effects, after return to usual activity level. Thus, the aim of this study was to analyze the effect of three protocols of hamstring and paravertebral lumbar muscles stretching, and joint flexibility and muscle extensibility after six weeks. Methods participants were 40 volunteers, with limited hamstring extensibility, randomized into three groups: active stretching static (n = 14), proprioceptive neuromuscular facilitation (n = 14) and kinesiostretching (n = 12). The protocol was divided into 3 stages: the 1st control (six weeks), the 2nd application of stretch (six weeks) and the 3rd follow-up (eight weeks). The project was approved by the Ethics Committee on Human Research Unioeste, under protocol number 25536/2008. Four evaluations were conducted with board coupled to a system and goniometry and Well´s bench, distributed at the beginning and end of each step. Data were analyzed with repeated measures ANOVA, and one-way, with a significance level of 5%. Results there was no significant difference for the three groups in the control stage. There were significant differences in the three protocols in the stage of stretching. After follow-up stage, there was significant difference in the ratings to the board goniometry, and there was no difference in the Well’s Bench. Conclusion the three techniques promoted significant gain in extensibility and flexibility, extensibility was not maintained after the follow-up stage, and the flexibility of the posterior chain continued gains.

scholarly journals Minimum 3.5-year outcomes of operative treatment for Achilles tendon partial tears in the midportion and retrocalcaneal area

2020 ◽  
Author(s):  
Heinz Lohrer
Keyword(s):  
Achilles Tendon ◽  
Repeated Measures ◽  
Treatment Strategies ◽  
Systematic Effect ◽  
Partial Tear ◽  
Partial Tears ◽  
Significant Difference ◽  
Respective Treatment ◽  
Retrocalcaneal Bursa

Abstract Background: Achilles tendon partial tears are not easy to diagnose and to manage. Most frequently, they are located in the midportion and insertional area. These entities result from different pathologic pathways and different treatment strategies are applied. The outcome is rarely investigated. Methods: This study includes patients who underwent surgery for partial tears in the midportion or retrocalcaneal Achilles tendon area between the years 2009 and 2015 by a single surgeon. Patients were prospectively assessed preoperatively and 3, 6, and 12 months postoperatively, using the VISA-A-G questionnaire. The final retrospective follow-up was performed after a minimum of 3.5 years postoperatively. Forty-eight Achilles tendon partial tears at the level of the retrocalcaneal bursa (impingement lesions) and 27 midportion Achilles tendon partial tears were identified. After applying rigorous exclusion criteria, 21 and 16 cases, respectively, remained for the final follow-up. Results were analysed by inferential and descriptive statistics.Results: The VISA-A-G outcome scores improved significantly from preoperative to six months, 12 months, and final postoperative assessment. Preoperatively, the average VISA-A-G score was 42.1 (range, 18-73) for patients operated for Achilles tendon partial tears at the level of the retrocalcaneal bursa and 44.6 (range, 10-73) for the midportion Achilles tendon partial tear group, respectively. At final follow-up 88.8 (range, 15 to 100) and 96.9 (range, 71 to 100) were scored in the respective treatment groups. A repeated measures ANOVA determined that mean performance levels showed a statistically significant difference between measurements (p < 0.001). There was no systematic effect found between groups (p = 0.836).Conclusions: In Achilles tendon partial tears recalcitrant to conservative treatment, operative intervention is highly successful in most cases, irrespective of the level of the injury. Results were statistically equal when comparing the midportion and retrocalcaneal Achilles tendon partial tear groups. Trial registration: DRKS, DRKS00014266. Registered 06 April 2018. 'Retrospectively registered', https://www.drks.de/drks_web/navigate.do?navigationId=results .

scholarly journals A Longitudinal Prospective Study: The Effect of Annual Seasonal Transition and Coaching Influence on Aerobic Capacity and Body Composition in Division I Female Soccer Players

Sports ◽  
2020 ◽  
Vol 8 (8) ◽  
pp. 107
Author(s):  
Troy M. Purdom ◽  
Kyle S. Levers ◽  
Chase S. McPherson ◽  
Jacob Giles ◽  
Lindsey Brown
Keyword(s):  
Body Composition ◽  
Statistical Analysis ◽  
Aerobic Capacity ◽  
Repeated Measures ◽  
Transition Period ◽  
Treadmill Running ◽  
Soccer Players ◽  
Concurrent Training ◽  
Spring Season ◽  
Significant Difference

This study assessed how seasonal transitions and coaching influence affect aerobic capacity (AC) and body composition across the annual training cycle (ATC). Eleven division 1 female soccer players were tested after five predesignated time blocks (B1–B5): post-season 2016 (B1), nine-week transition (B2), spring season (B3), pre-season (B4), and post-season 2017 (B5). Height, weight, and body composition (fat-free mass (FFM)) were measured prior to a standardized 5 min treadmill running and dynamic movement warm up before a maximal AC test. Statistical analysis included a 4 × 5 repeated-measures analysis of variance (ANOVA) (dependent variable × time) with the Fishers Least Significant Difference (LSD) post-hoc test when relevant; data are presented as mean ± standard deviation, effect size (ES), and percent change (%). The statistical analysis revealed that the ATC had a significant main effect on AC and FFM (F3,4 2.81, p = 0.001; η2 = 0.22). There were significant increases in AC across the transition period (B1–B2) with reduced training volume (∆ + 12.9%, p = 0.001; ES = 0.50) while AC and FFM peaked after the spring season with directed concurrent training paired with adequate rest B1–B3 (∆ + 16.4%, p < 0.01; ES = 0.81). AC decreased across the pre-season with indirect training (B3–B4) (∆ − 7.0%, p = 0.02; ES = 0.50) and remained suppressed without change (p > 0.05) across the competitive season (B4–B5). Rest, concurrent training, and directed training positively affected AC, while indirect training and high training loads with little rest negatively affected AC.

scholarly journals The role of bone marrow edema on autologous matrix induced chondrogenesis for the treatment of osteochondral lesions of the talus

2017 ◽  
Vol 2 (3) ◽  
pp. 2473011417S0001
Author(s):  
Riccardo D’Ambrosi ◽  
Camilla Maccario ◽  
Federico Giuseppe Usuelli
Keyword(s):  
Bone Marrow ◽  
Repeated Measures ◽  
Bone Marrow Edema ◽  
Lesion Size ◽  
Osteochondral Lesions ◽  
Significant Difference ◽  
T1 And T2 ◽  
Marrow Edema

Category: Ankle, Arthroscopy, Basic Sciences/Biologics Introduction/Purpose: to assess the functional and radiological outcomes after AT-AMIC® (arthroscopic talus autologous matrix induced chondrogenesis) in 2 groups: patients with and without bone marrow edema (BME). Methods: Thirty-seven patients of which 24 without edema (GNE) and 13 with edema (GE) were evaluated. All patients were treated with AT-AMIC® repair for osteochondral talar lesion. MRI and CT-scan evaluations, as well as clinical evaluations measured by the VAS score for pain, AOFAS and SF-12 were performed preoperatively (T0) and at 6 (T1), 12 (T2), and 24 (T3) months postoperatively. Results: GNE consisted of 24 patients while GE consisted of 13 patients. In both groups we found a significant difference for clinical and radiological parameters with ANOVA for repeated measures through four time points(p<0.001). In GNE, AOFAS improved significantly at each follow-up(p<0.05); while CT and MRI showed a significant decrease between T1 and T2 and T2 and T3(p<0.05). In GE, AOFAS improved significantly between T0 and T1 and T2 and T3(p<0.05); CT decreased between T1 and T2(p<0.05), while MRI showed a reduction at each follow-up(p<0.05). Lesion size was significantly higher both in MRI and CT in GE in respect to GNE(p<0.05). In the GNE no patients presented edema at T3, while in GE only 23.08% of the patients presented edema at T3. Conclusion: The study revealed that osteochondral lesions of the talus were characterized by bigger size both in MRI and CT in patients with edema. We conclude that AT-AMIC® can be considered a safe and reliable procedure that allows effective healing, regardless of edema and more than half of patients did not present edema six months after surgery.

Sight-Singing Scores of High School Choristers with Extensive Training in Movable Solfège Syllables and Curwen Hand Signs

2008 ◽  
Vol 56 (3) ◽  
pp. 255-266 ◽  
Author(s):  
Alan C. McClung
Keyword(s):  
High School ◽  
Knowledge Base ◽  
Repeated Measures ◽  
The Other ◽  
Sight Singing ◽  
Repeated Measures Anova ◽  
Pedagogical Strategy ◽  
Extensive Training ◽  
Significant Difference ◽  
The Mean

Randomly chosen high school choristers with extensive training in solfège syllables and Curwen hand signs ( N = 38) are asked to sight-sing two melodies, one while using Curwen hand signs and the other without. Out of a perfect score of 16, the mean score with hand signs was 10.37 ( SD = 4.23), and without hand signs, 10.84 ( SD = 3.96). A repeated-measures ANOVA revealed no statistically significant difference, F(1, 37) = .573, p = .454. These findings support the results of five earlier studies; however, because earlier studies were limited to students who were minimally trained in movable solfège syllables and Curwen hand signs, this study expands the knowledge base. Relationships between performance scores and instrumental experience, class grade, sight-singing experience, and hand sign experience were also examined. A pedagogical strategy for linking Curwen hand signs with students' preferred modes of learning (especially the kinesthetic mode) is recommended.

scholarly journals Evaluation of the effects of Vitamin C on Epithelialization of Burn Wounds: A Randomized Clinical Trial

2020 ◽  
Author(s):  
Mohammd Haddadi ◽  
Elaheh Jaghouri ◽  
Davood Robat Sarpooshi ◽  
Fateme Ghobadi ◽  
Hamid Robat Sarpooshi
Keyword(s):  
Clinical Trial ◽  
Vitamin C ◽  
Repeated Measures ◽  
Assessment Tool ◽  
Burn Wound ◽  
Repeated Measures Anova ◽  
Burn Wounds ◽  
Significant Difference ◽  
Treatment Data ◽  
Second Degree

Abstract Objectives The purpose of this study is to determine the effect of topical vitamin C on second-degree burn wounds restoration. This was a clinical trial. The sample size was determined as 30. Participants were selected from patients suffering from second-degree burns who visited the Burn Center of Vaseei Hospital in Sabzevar. Both intervention and control groups targeted one patient.Dressing was changed in a daily manner after cleansing. A topical vitamin C solution was administered on the wounds. The Bates-Jensen Wound Assessment Tool was used to evaluate burn wound parameters in the 1 st , 3 rd , 7 th , and 14 th days of treatment. Data was analyzed using SPSS v.16 and ‘’repeated measures ANOVA. Results The average age of participants was 43.33 ± 11.9 years and 60% of the participants were males and 40% of them were females. The results of repeated measures ANOVA showed a statistically significant difference in mean scores of the wound between the two treatments (P = 0.047), wound healing significantly differed in the two groups and topical vitamin C solution had a significant effect on the acceleration of wound Epithelialization. The administration of topical vitamin C is recommended for epithelialization of second-degree burns.

scholarly journals Ipsilateral and Contralateral Torque Responses to Bilateral and Unilateral Maximal, Fatiguing, Isokinetic Leg Extensions

2020 ◽  
Vol 8 (4) ◽  
pp. 25
Author(s):  
Tyler J. Neltner ◽  
John Paul V. Anders ◽  
Joshua L. Keller ◽  
Robert W. Smith ◽  
Terry J. Housh ◽  
...  
Keyword(s):  
Isometric Contraction ◽  
Repeated Measures ◽  
Central Fatigue ◽  
Peak Torque ◽  
Maximal Voluntary Isometric Contraction ◽  
Repeated Measures Anova ◽  
The Right ◽  
Post Hoc ◽  
Isokinetic Peak Torque

Background: Few studies have compared performance fatigability (PF) for bilateral versus unilateral isokinetic tasks. Objectives: The purpose of this study was to examine: Mode-specific testing responses to isokinetic fatigue, differences in PF between bilateral and unilateral leg extensions, and the effects of fatiguing, unilateral, dynamic leg extensions on contralateral isokinetic peak torque (PT) and maximal voluntary isometric contraction (MVIC). Methods: Eight men (mean ± SD: age= 22.5 ± 2.5 yr.) completed pre- and post-testing for PT and MVIC following 50 bilateral, unilateral right or left leg maximal, isokinetic leg extensions at 180°·s-1, on three separate days. Fatigue-induced decreases in PT and MVIC were used to quantify PF. The data were analyzed with a 4-way repeated measures ANOVA, follow up, and post-hoc analyses. Results: The results indicated that there were no differences (p > 0.05) in PF for the bilateral versus unilateral fatiguing tasks, decreases in PT (p < 0.001 - 0.016; d = 0.54 - 2.58) and MVIC (p < 0.001 - 0.006; η2p = 0.682 - 0.962) for the exercised legs during unilateral fatigue, and a contralateral increase (p = 0.007) in PT following the right leg fatiguing task. Conclusion: The results indicated that PT was more sensitive to fatiguing isokinetic tasks than was MVIC. In addition, there was a facilitation of PT in the contralateral leg following unilateral right leg fatigue. The differences in PT and MVIC testing may be attributable to the timing and/or relative contributions of peripheral and central fatigue.

scholarly journals Die ontwikkeling van [ʃ] in Afrikaans

Literator ◽  
2018 ◽  
Vol 39 (2) ◽  
Author(s):  
Daniel P. Wissing
Keyword(s):  
Sound Change ◽  
Time Span ◽  
Acoustic Properties ◽  
Follow Up Study ◽  
Short Time Span ◽  
Significant Difference ◽  
Two Generations ◽  
Short Time

The development of [ʃ] in Afrikaans. This is a follow-up study on a seemingly recent development of the consonant system of Afrikaans that Wissing, Pienaar and Van Niekerk (2015) reported on. They show that the voiceless alveolar fricative /s/ is produced as the [ʃ], a voiceless postalveolar or alveopalatal fricative when immediately following the rhotic /r/, but as [s] in contexts other than this. To establish whether this phenomenon is characteristic of present-day Afrikaans in contrast to the pronunciation of previous generations, a survey was conducted in which the readings of news bulletins by two groups of radio presenters were analysed regarding their acoustic properties. These groups are representative of two generations of Afrikaans speakers, characterised as Oud [Old] and Jonk [Young]. Apart from the fact that the reading by Oud were recorded one to two decades ago (2000–2006), and those by Jonk during 2017, the average ages of these groups were at the time of recording 29 years for Jonk, and 50 years for Oud. A significant difference between the acoustic properties of the fricative /s/ following /r/ of these two groups was found. More specifically, Jonk, unlike Oud, clearly produced this phoneme as [ʃ]. This shows that notable sound shifts might happen within a relatively short time span. The article is concluded by considering a possible explanation of this recent phenomenon within the realm of theories of internal sound change. 

scholarly journals Effectiveness of nonviolent communication (NVC) workshop on marital adjustment

2017 ◽  
Vol 26 (1) ◽  
pp. 69-75
Author(s):  
Shaheen Islam ◽  
Roufun Naher
Keyword(s):  
Repeated Measures ◽  
Marital Adjustment ◽  
Positive Impact ◽  
Control Group ◽  
Nonviolent Communication ◽  
Repeated Measures Design ◽  
Significant Difference ◽  
Post Test ◽  
Experimental Group

The present study examined the effectiveness of nonviolent communication (NVC) workshop on marital adjustment. The hypothesis was receiving nonviolent communication (NVC) workshop has positive impact on marital adjustment. The independent variable was NVC workshop and the dependent variable was marital adjustment score. For conducting this research, repeated measures design was followed and 20 Bangladeshi married people participated in it. The results have shown that there was a statistically significant difference (F = 16.790, p < 0.05) in marital adjustment score of experimental group over the three time periods and pairwise comparisons indicate that there was significant difference between pretest and post-test and also between pretest and follow- up test at the 0.05 level. Results also have shown that, there was statistically significant difference of marital adjustment score between experimental and control group in posttest (t = 4.276, p < 0.05) and follow-up test (t = 4.176, p < 0.05). Thus, after receiving NVC workshop the marital adjustment score of experimental group increased significantly (F = 16.79, p < 0.001) in post-test measure and also remain constant in follow-up, whereas the marital adjustment score of control group had no significant change. This implied a significant positive impact of participation in NVC workshop on marital adjustment. Dhaka Univ. J. Biol. Sci. 26(1): 69-75, 2017 (January)

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