scholarly journals Development of a novel biofeedback system for the sprint start

2022 ◽  
pp. 174795412110727
Author(s):  
Jorge Cortes Gutierrez ◽  
Sean Peter Walton ◽  
Neil Edward Bezodis
Keyword(s):  
Control Group ◽  
The Novel ◽  
Knee Angle ◽  
Start Line ◽  
Acute Responses ◽  
Biofeedback System ◽  
Post Test ◽  
Measurement Units ◽  
Learning Principles ◽  
3D Motion Capture

This study developed and evaluated a novel concurrent biofeedback system for the sprint start. Previous studies have investigated sprint start biofeedback applications, but these have either not considered important kinematics, coaching implications or key motor learning principles. The biofeedback system was developed to convey rear knee angle information, obtained from 3D motion capture to novice participants as changes in the colour of an LED start line when they were in the “set” position. Based on initial user feedback, the system indicated whether the participants’ rear knee angles were within ± 2° of 130° (green) or not (red). A two-group experimental study was then employed to explore the acute responses of novices to the use of the biofeedback system during the sprint start. When exposed to biofeedback, the experimental group (EXP, n = 10) exhibited less deviation (4.0 ± 2.4°) from the target rear knee angle than they did in either a pre-test (11.9 ± 6.9°) or post-test (10.4 ± 4.4°) condition without biofeedback. The control group (CON, n = 10) with no biofeedback exhibited greater deviation from the target rear knee angle than the EXP group in all three condition blocks (pre-test = 21.8 ± 15.1°, no intervention = 15.6 ± 7.3°, post-test = 14.3 ± 6.5°) but the group × condition interaction effect was not significant (P = 0.210). The novel biofeedback system can be used to manipulate selected “set” position kinematics and has the potential to be incorporated with different input systems (e.g. inertial measurement units (IMUs)) or in longitudinal designs.

Feasibility of Wearable Haptic Biofeedback Training for Reducing the Knee Abduction Moment During Overground Walking

2020 ◽  
Vol 143 (4) ◽  
Author(s):  
Bryndan W. Lindsey ◽  
Junkai Xu ◽  
David Chiasson ◽  
Peter Shull ◽  
Nelson Cortes
Keyword(s):  
Feedback System ◽  
Biofeedback Training ◽  
Overground Walking ◽  
Biofeedback System ◽  
Peak Knee ◽  
Knee Loading ◽  
Post Test ◽  
Knee Abduction ◽  
3D Motion Capture ◽  
Healthy Participants

Abstract Gait modifications are effective in reducing the first peak knee abduction moment (PKAM), a surrogate for knee loading. Reliance on 3D motion capture currently restricts these modifications to the laboratory. Therefore, our purpose was to test the feasibility of a novel wearable biofeedback system to train (1) toe-in and trunk lean modifications and (2) combined toe-in and trunk lean modifications to reduce PKAM during overground walking outside of the laboratory. Twelve healthy participants practiced modifications in a university hallway directly after performing five normal walking trials. The wearable feedback system provided real-time haptic biofeedback during training trials to inform participants if they were within the prescribed modification range (7–12 deg greater than baseline). Participants were instructed to move to the next modification only once they felt comfortable and could perform it with minimal errors. Following training, five trials of each modification were immediately performed in the gait laboratory without feedback. All participants successfully modified their foot progression and trunk angle using the wearable system. At post-test, PKAM decreased from baseline by 62%, 55%, and 28% during combined, trunk leanand toe-in gait, respectively. The wearable feedback system was effective to modify participants' foot and trunk angle by the prescribed amount, resulting in reduced PKAM during all modifications at post-test. Participants were also able to perform a combined modification, although it took longer to report feeling comfortable doing so. This study demonstrates that a wearable feedback system is feasible to modify kinematic parameters and train gait modifications outside the laboratory.

The effectiveness of ‘Student Team Achievement Divisions’ (STAD) model towards students’ achievement in the Principles of Accounting subject

2020 ◽  
Vol 13 ◽  
pp. 1-14
Author(s):  
Nor Azzatul Akmarisha Serjali ◽  
Hazianti Abdul Halim
Keyword(s):  
Treatment Group ◽  
Correlation Analysis ◽  
Pearson Correlation ◽  
Control Group ◽  
Significant Difference ◽  
Post Test ◽  
Pearson Correlation Analysis ◽  
Inferential Analysis ◽  
Principles Of Accounting ◽  
Learning Principles

The purpose of this study was to determine the effectiveness of the STAD model towards students’ achievement in the Principles of Accounting subject, specifically in the Ledger topics. This study also evaluated students' understanding, motivation, attitude and interest in learning Principles of Accounting after using the STAD model. A quantitative approach with a quasi-experimental design was used. The sample selection involved Form 4 students from the social science stream comprising 30 students in the treatment group and 30 students in the control group. The research instruments used were pre-test, post-test and a survey questionnaire. The data was analyzed using the descriptive and inferential analysis. The descriptive analysis was used to describe students' perceptions of learning Principles of Accounting after using the STAD model. The inferential analysis involved analysis such as independent sample t-tests, paired sample t-tests and Pearson correlation analysis to explain the differences and relationships between the variables of the study. The findings showed that there was a significant difference between the treatment group and the control group in the post-test whereby the treatment group showed a significant and higher improvement (mean score= 18.267) compared to the control group (mean score= 15.133). The Pearson correlation analysis also showed a strong relationship (r= 0.745) between the STAD model and student achievement in post-test analysis. The results of the students' perceptions of Principles of Accounting after using the STAD model showed that their levels of understanding and motivation were high. The findings of this study showed that the STAD model improved students' achievement, understanding and motivation in Principles of Accounting subject. The implications of this study indicated that the STAD model could enhance the learning effectiveness of Principles of Accounting.

NILAI ANKLE BRACHIAL INDEX PADA PENDERITA DIABETES MELITUS TIPE 2 SESUDAH MELAKUKAN BUERGER ALLEN EXERCISE DI PUSKESMAS WILAYAH KECAMATAN NGANJUK

2018 ◽  
Vol 4 (1) ◽  
Author(s):  
Supriyadi . ◽  
Nurul Makiyah ◽  
Novita Kurnia Sari
Keyword(s):  
Ankle Brachial Index ◽  
Control Group ◽  
P Value ◽  
Test Design ◽  
Purposive Sampling ◽  
Paired Samples ◽  
Post Test ◽  
Diabetes Melitus

<p><em>Buerger Allen Exercise</em> mampu meningkatkan pemakaian glukosa oleh otot yang aktif sehingga glukosa dalam darah dapat menurun, dapat membantu mencegah terjadinya penyakit arteri perifer, serta meningkatkan aliran darah ke arteri dan berefek positif pada metabolisme glukosa. Penelitian ini bertujuan untuk mengetahui nilai <em>ankle brachial index</em>pada penderita diabetes melitus tipe 2setelah melakukan <em>Buerger Allen exercise</em>. Jenis penelitian ini adalah <em>quasy-experiment </em>dengan<em> pre-post test design with control group</em><em>.</em> Jumlah sampel 60 penderita diabetes melitus tipe 2 dengan <em>purposive sampling</em>, dibagi menjadi 2 kelompok yaitu kelompok perlakuan dan kelompok kontrol. Responden kelompok perlakuan diberikan intervensi <em>Buerger Allen exercise</em> sebanyak 12 kali  selama 15 hari.Penelitian dilakukan di wilayah Puskesmas Kecamatan Nganjuk.Data hasilpengukuran nilai <em>ankle brachial index</em>berupa ratio dan diuji statistik dengan <em>Paired Samples Test</em>. Didapatkan <em>p value</em> 0.001 untuk kelompok perlakuan (<em>p value</em>&lt; 0.05) yang menunjukkan bahwa adanya perubahan bermakna secara statistik nilai <em>ankle brachial index</em> sesudah melakukan <em>Buerger Allen exercise</em>. Dapat disimpulkan bahwa nilai <em>ankle brachial index</em>pada penderita diabetes melitus tipe 2 meningkat sesudah melakukan <em>Buerger Allen exercise</em>.</p><p> </p><p> <strong>Kata kunci :penderita diabetes melitus tipe2, <em>Buerger Allen Exercise, Ankle brachial index</em></strong></p><p> </p>

TEACHING READING BY UTILIZING HOT POTATOES SOFTWARE TOWARD STUDENTS’ READING COMPREHENSION OF DESCRIPTIVE TEXT

2018 ◽  
Vol 5 (1) ◽  
pp. 26
Author(s):  
Abdullah Farih
Keyword(s):  
Reading Comprehension ◽  
Alternative Hypothesis ◽  
T Test ◽  
Control Group ◽  
Teaching Reading ◽  
Post Test ◽  
Quasi Experimental ◽  
Independent Variable ◽  
Level Of Significance ◽  
And Control

The objective of this study is to measure whether there is or not significant effect of teaching reading by utilizing Hot Potatoes software toward students’ reading comprehension of descriptive text. The variables used were the teaching treatment of Hot Potatoes Software as the independent variable and the students’ reading comprehension of Descriptive Text as dependent variable. Then, the research designed was Quasi-experimental design and the presentation of data used was quantitative. The data were obtained from the eleventh grade, of which 28 students were taken as sample. The students are divided into two groups; experiment group consisted of 12 students and control group consists of 16 students. To get the data, the pre-test and post-test were applied and then analyzed using t-test formula. The researcher had concluded that there is Significant effect of Hot Potatoes Software toward the students’ reading comprehension achievement. The result showed that mean of students’ post-test was increased. It is proved by the t-test (8.54) which is higher than t-table (2.05) at level of significance 5%. It means that the alternative hypothesis was accepted and it proved that Hot Potatoes Software had significant effect toward students’ reading comprehension of Descriptive Text

Pengaruh Pemberian Ekstrak Daun Kluwih (Artocarpus camansi) Terhadap Penurunan Aktivitas SGPT Tikus Putih (Rattus norvegicus) Jantan Galur Wistar yang di Induksi Parasetamol Dosis Tinggi.

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Bara Pawana Satya Nagara
Keyword(s):  
Rattus Norvegicus ◽  
Control Group ◽  
Post Test

ABSTRAK Latar Belakang: Kebiasaan masyarakat Indonesia menggunakan obat-obatan yang mudah didapat seperti parasetamol, dimana parasetamol dijual secara bebas akan menyebabkan penyalahgunaannya menjadi lebih besar.Penyalahgunaan ini berakibat timbulnya efek samping  seperti efek hepatotoksik yang menimbulkan kerusakan pada sel-sel hati. Pengendalian efek hepatotoksi didalam tubuh dapat dibantu dengan mengkonsumsi makanan yang mengandung antioksidan. .Ekstrak daun kluwih (Artocarpus camansi) memiliki kandungan antioksidan seperti flavanoid yang diyakini dapat menurunkan aktivitas SGPT dan mengurangi efek toksisitas hepar oleh parasetmol. Tujuan: Tujuan penelitian ini adalah untuk mengetahui pengaruh pemberian ekstrak daun kluwih (Artocarpus camansi) terhadap penurunan aktivitas SGPT  tikus putih (Rattus norvegicus) jantan galur Wistar yang diinduksi parasetamol. Metode: Merupakan post-test only control group mengunakan hewan coba tikus putih jantan galur Wistar yang dikelompokkan menjadi 3 kelompok yaitu kelompok kontrol (-), kelompok kontrol (+), kelompok perlakuan yang mendapat terapi ekstrak daun kluwih (Artocarpus camansi) 500 mg/Kg BB Hasil: Hasil penelitian menunjukkan pemberian ekstrak daun kluwih (Artocarpus camansi) dosis 500 mg/kg/BB/hari pada tikus tidak menurunkan secara bermakna aktivitas SGPT pada kelompok tikus yang diberi parasetamol dosis tinggi ( p=0,401 α=0,05) Kesimpulan: Parasetamol dosis tinggi meningkatkan secara bermakna aktivitas SGPT tikus putih (Rattus norveicus) galur Wistar. Pemberian ekstrak daun kluwih (Artocarpus camansi) pada aktivitas SGPT tikus putih (Rattus norveicus) galur Wistar menurunkan  secara tidak bermakna. Kata kunci : Artocarpus camansi, Parasetamol, SGPT

PENGGUNAAN MODEL PEMBELAJARAN STAD (STUDENT TEAMS-ACHIEVMENT DIVISIONS) DALAM PEMBELAJARAN MENULIS SURAT DINAS SISWA KELAS VIII DI SMP NEGERI SE-KECAMATAN PANYINGKIRAN KABUPATEN MAJALENGKA TAHUN AJARAN 2013/2014

2017 ◽  
Vol 3 (1) ◽  
pp. 447
Author(s):  
Iyay Robia Khoerudin ◽  
Neneng Titin ◽  
Eki Kiyamudin
Keyword(s):  
Random Sampling ◽  
Simple Random Sampling ◽  
Control Group ◽  
Control Group Design ◽  
Group Design ◽  
Student Teams ◽  
Post Test ◽  
Test Control

Penelitian ini bertujuan untuk mengetahui kemampuan menulis surat dinas siswa kelas VIII di SMP Negeri Se-Kecamatan Panyingkiran Kabupaten Majalengka, mengetahui kemampuan menulis surat dinas dengan menggunakan model pembelajaran STAD (Student Teams-Achievment Divisions) siswa kelas VIII di SMP Negeri Se-Kecamatan Panyingkiran Kabupaten Majalengka, serta menjelaskan efektifitas model pembelajaran STAD (Student Teams-Achievment Divisions) untuk meningkatkan  pengajaran menulis surat dinas siswa Kelas VIII di SMP Negeri Se-Kecamatan Panyingkiran Kabupaten Majalengka.Penelitian ini menggunakan pendekatan kuantitatif dan kualitatif dengan metode eksperimen Pre test-Post test Control Group Design, populasinya yaitu SMP Negeri Se-Kecamatan Panyingkiran Kabupaten Majalengka tahun ajaran 2013/2014, sedangkan  sampelnya ditentukan melalui teknik simple random sampling yaitu kelas VIII G SMP Negeri 2 Panyingkiran sebagai kelas eksperimen dan kelas VIII B SMP Negeri 1 Panyingkiran sebagai kelas kontrol. Instrumen pengumpulan data yang digunakan tes tertulis tes awal dan tes akhir, kuesioner, lembar observasi guru dan siswa, setelah data diperoleh maka dilakukan analisis data. Data kuesioner dan observasi dianalisis dalam bentuk uraian sedangkan data tes dianalisis dengan statistik dan di deskripsikan.Berdasarkan perhitungan statistik program SPSS 16.0 diperoleh hasil uji t pretes pada kedua kelas tersebut memiliki nilai t=5.429 derajat kebebasan (df)=n-1=38 nilai probability (sig 2-tailed) sebesar 0,000.  Hal ini berarti t hitung <0,005. Artinya 0,000<0,05, pada uji t ini bahwasanya pretes pada kedua kelas terdapat perbedaan yang signifikan antara kelas eksperimen dengan kelas kontrol.  Apabila ditinjau dari segi rata-rata pretes eksperimen lebih efektif daripada kelas kontrol. Hal ini terbukti dari rata-ratanya pretes kelas eksperimen 64,8 kelas kontrol 62,3 selisih rata-rata 2,5. Sedangkan rata-rata postes kelas eksperimen 81,2 dan kelas kontrol 69 terjadi selisih postes 12,2.

ANALISIS KEMAMPUAN PROBLEM POSING MATEMATIS SISWA DALAM PEMBELAJARAN MODEL KOOPERATIF NHT

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
Kadir Kadir ◽  
Munawir Sadzali
Keyword(s):  
Random Sampling ◽  
Problem Posing ◽  
Control Group ◽  
Control Group Design ◽  
Group Design ◽  
Post Test ◽  
Cluster Random Sampling

Tujuan dari penelitian ini adalah menganalisis pengaruh model pembelajaran kooperatif tipe Number Head Together (NHT) terhadap keterampilan problem posing matematis siswa. Penelitian ini dilakukan di SD Al- Zahra Indonesia, untuk tahun akademik 2014/2015. Metode yang digunakan dalam penelitian ini adalah metode kuasi eksperimen dengan Post-test Only Control Group Design, melibatkan 60 siswa sebagai sampel. Untuk menentukan sampel digunakan teknik cluster random sampling. Pengambilan data menggunakan instrumen seperti tes esai tertulis. Keterampilan problem posing matematis siswa yang mengajar dengan model pembelajaran kooperatif tipe Number Head Together (NHT) lebih tinggi daripada keterampilan problem posing matematis siswa yang diajarkan dengan model pembelajaran klasik (t hitung = 2,01 table t tabel = 2,00 ). Persentase jawaban siswa dari problem posing berdasarkan gambar, tabel dan diagram yang diajarkan dengan model pembelajaran kooperatif tipe Number Head Together (NHT) lebih tinggi daripada siswa yang mengajar dengan model pembelajaran klasik. Kesimpulan hasil penelitian ini bahwa pembelajaran matematika Pecahan dengan model pembelajaran kooperatif tipe Number Head Together (NHT) memiliki pengaruh yang signifikan terhadap keterampilan problem posing matematika siswa.

The effectiveness of positive training on happiness, aggression and hope in adolescents with leukemia in Ahvaz

2018 ◽  
Vol 9 (01) ◽  
Author(s):  
Marzieh . Shamkhani ◽  
Ali . Khalafi
Keyword(s):  
Sampling Method ◽  
Analysis Of Covariance ◽  
Control Group ◽  
Positive Attitudes ◽  
Measurement Tools ◽  
Post Test ◽  
Aggression Questionnaire ◽  
Experimental Group ◽  
Period Measurement

The purpose of this study was to determine the effectiveness of positive learning on happiness, Aggression and hope for adolescents with leukemia in Ahvaz. The sample consisted of 30 people who were selected by available sampling method. 15 subjects in the experimental group and 15 in the control group were randomly assigned. The experimental design was a pre-test-post-test type with control group and follow-up period. Measurement tools included Oxford Happiness Inventory (Argyle, 1989); Ahwaz's Aggression Questionnaire (Zahedifar, Najarian, and Shokrkon, 2000); Hope Scale (Schneider, 1991). To run, at first, the pre-test was taken from both groups. Then, the experimental group was trained in 14 sessions of 90 minutes, and after each group, they were subjected to post-test. And one month later, the follow-up process was completed. Data analysis was performed using multivariate covariance analysis (MANCOVA) and one-way analysis of covariance (ANCOVA). The results showed that positive attitudes toward happiness, aggressiveness and hopefulness of adolescents with leukemia in Ahvaz were effective.

The Effect of Language Games with Audio Visual Aids on Students’ Speaking Competence at Fourth Graders of Tunas Daud Elementary School

2019 ◽  
Vol 3 (3) ◽  
pp. 185
Author(s):  
Susnawati. K ◽  
Marhaeni A.A.I.N ◽  
Ramendra D.P
Keyword(s):  
Elementary School ◽  
Fourth Graders ◽  
Fourth Grade ◽  
Control Group ◽  
Language Games ◽  
Visual Aids ◽  
Fourth Grade Students ◽  
Post Test ◽  
Competence Test ◽  
Better Than

Study aimed to determine the effect of language games with audio visual aids on students' speaking competence at fourth grade students of Tunas Daud elementary school and to describe the implementation of language games with audio visual aids on students’ speaking competence. The design used in this research was a mixed method design. It was explanatory design since this research was started with quantitative design (experimental design with post test only control design) followed by qualitative design. The samples were 62 students; 31 students of the experimental group and 31 students of the control group of fourth grade Tunas Daud elementary students. The data were collected by using speaking competence test and analyzed by IBM SPSS 22 with independent t-test. The data were also collected through an observation sheet for observing the implementation of the language games with audio visual aids. The results showed there was a significant effect of the language games with audio visual aids on students' speaking competence in which the mean score of the students who were taught by using language games with audio visual aids is better than the students who were taught without language games with audio visual aids. For the implementation of the language games with audio visual aids, it can be seen that the implementation of the language games with audio visual aids were done in a very good way. The games was suitable for the students since it could give good impacts for the students. The students are active and confident to speak.

PENGARUH PEMBELAJARAN INOVATIF TERHADAP HASIL BELAJAR BAHASA INGGRIS SISWA KELAS VIIIB1 SMP NEGERI 2 GEROKGAK DENGAN PENGENDALIAN KECERDASAN LINGUISTIK

2019 ◽  
Vol 1 (1) ◽  
pp. 108-114
Author(s):  
I Made Wirta
Keyword(s):  
Sampling Technique ◽  
Analysis Of Covariance ◽  
Control Group ◽  
Learning Approaches ◽  
Control Group Design ◽  
Post Test ◽  
Quasi Experimental ◽  
Innovative Learning ◽  
Inferential Analysis ◽  
English Students

The main objective of the present study is to investigate the effect of implementing innovative learning approaches upon English students’ achievement. The study was quasi experimental study using the post-test only control group design involving 35 students altogether selected using census sampling technique. The instrument which is used to gather data in the study was test. There were two tests used to gather intended data. They were linguistic test and student achievement test. The obtained data were analyzed statistically using descriptive and inferential analysis. The analysis of covariance was conducted to test the hypotheses.

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