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Lactic acid and cognitive function: Investigations in female volleyball athletes Lardika, Rola Angga; Tarigan, Beltasar; Ray, Hamidie Ronald Daniel; Yudiana, Yunyun
Journal Sport Area Vol 8 No 2 (2023): August
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/sportarea.2023.vol8(2).12707

Lactic acid is a by-product of anaerobic metabolism and is commonly associated with muscle fatigue. However, recent research suggests that lactic acid may also positively affect cognitive function. Thus, this study aimed to investigate the relationship between lactic acid and cognitive function in female volleyball athletes. The study involved 12 female volleyball players from the Student Education and Training Centre (PPLP) of Riau Province, and a total sampling method was utilised. Data collection involved cognitive function tests using the Concentration Grid Test (CGT) instrument and lactic acid measurements using Accutrend lactate. The results revealed a significant correlation between lactic acid and cognitive function, with athletes with higher lactic acid levels after the training session performing better on cognitive tests. This suggests that lactic acid may enhance cognitive function by increasing glucose availability, which serves as the brain’s primary energy source. However, it is essential to consider the potential negative effects of excessive lactic acid levels, such as muscle fatigue, breakdown, and lactic acidosis, on both of the body and brain. Despite demonstrating the role of lactic acid in cognitive function among female volleyball athletes, caution must be exercised to prevent undue lactic acid production. Overall, this study provides valuable insight into the intricate relationship between lactic acid and cognitive function, which has implications for optimising cognitive ability in female volleyball athletes and potentially in other professional sports. Future research is needed to establish optimal lactic acid levels for cognitive function in diverse athletic contexts.

Keterpelajaran Gerak: Korelasi Keterampilan Psikomotorik dengan Cognitive Function Siswa Lardika, Rola Angga; Beltasar Tarigan; Hamidie Ronald Daniel Ray; Yunyun Yudiana
Jurnal Elementaria Edukasia Vol. 6 No. 2 (2023): Juni
Publisher : Elementary Teacher Education Program, Majalengka University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31949/jee.v6i2.5258

This research is a quantitative study with a correlational design that aims to determine the relationship between motor learning and cognitive function in students of public elementary schools in Kuantan Tengah District, Kuantan Singingi Regency, Riau Province. The population of this study was fifth grade students for the 2022/2023 school year, with a population of 627 children spread across 27 public elementary schools. The sampling technique used in this research is random sampling. With this technique, I obtained a sample of 94 students. Methods of data collection using tests and measurements of cognitive function and movement skills Cognitive function uses the Concentration Grid Test (CGT) instrument and movement skills by observing movement learning. The results showed that students' cognitive function was in a good category, and their movement learning was also good. The results of the correlation analysis obtained a correlation coefficient of 0.695 > rtable = 0.396. This shows that there is a significant relationship between movement learning and cognitive function in fifth grade public elementary school students in Kuantan Tengah District for the 2022/2023 academic year. The conclusion that can be drawn from the results of the research is that one student's movement learning is influenced by cognitive function. Students who have good cognitive function tend to have good movement skills.

The effectiveness of outdoor education on positive youth development and 21st century skills Bakar, Ryan Abu; Fitri, Mustika; Hidayat, Yusuf; Ma'mun, Amung; Lardika, Rola Angga
Journal Sport Area Vol 9 No 3 (2024): December
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/sportarea.2024.vol9(3).16758

Background Problems: Adolescents face various social challenges, such as the need to succeed in a competitive environment, cope with stress, face a global pandemic, and must develop in the future as adults. Research Objectives: The purpose of this research is to create an outdoor program integrated with PYD and 21st century skills that form a generation of young people who are resilient and ready to face global challenges. Methods: The method used in this study was the quasi-experimental design research method. The design used in this study was Pretest-Posttest Control Group Design With More Than One Experimental Group. The research instrument to measure 21st century skills is the 21st century skills questionnaire, and to measure positive youth development (PYD) using the PYD 7Cs questionnaire. Findings and Results: There was a significant difference in the effect of the outdoor education program of PYD integration with the control group with a calculated f value of 17,993 and a sig value of 0.000. Similarly, there are differences between the 21st century skill integration group and the control group with a calculated f value of 15.579 and a sig value of 0.000. Conclusion: The results show that outdoor education that integrates PYD and 21st century skills has a better impact so that youth have excess energy if not channelled into positive activities. Youth needs in outdoor education activities are still an attractive choice. In the 21st century, outdoor education activities become meaningful learning with the condition that there is an integration concept both in 21st century skills and positive youth development.

Pelatihan Fisik Atlet Tenis Lapangan Dalam Menghadapi Event POMNas XVIII Kalimantan Selatan Tahun 2023 Iqbal, Muhammad; Lardika, Rola Angga; Agust, Kristi
Jurnal Akuntansi Hukum dan Edukasi Vol 2, No 1 (2025): Mei 2025
Publisher : CV. Rayyan Dwi Bharata

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57235/jahe.v2i1.6157

Penelitian ini dilatarbelakangi oleh permasalahan mengenai Latihan-latihan yang mampu meningkatkan fisik bagi para atlet tenis lapangan dalam mempersiapkan POMNas XVIII di Kalimantan Selatan tahun 2023. Penelitian ini bertujuan untuk mengetahui apa saja latihan fisik yang dilakukan oleh para atlet dalam meningkatkan fisiknya untuk mengikuti event POMNas XVIII yang berlangsung pada tanggal 12 – 22 November 2023. Penelitian ini menggunakan metode observasi yang Dimana Teknik pengumpulan datanya menggunakan dokumentasi yang merupakan sumber informasi yang diperlukan oleh peneliti. Selanjutnya dokumentasi dapat diartikan sebagai teknik pengumpulan data melalui bahan-bahan yang tertulis. Hasil penelitian ini menunjukkan bahwa latihan fisik yang dilakukan para atlet sebelum mengikuti event POMNas ke XVIII mampu menigkatkan fisik atlet saat bertanding. Sehingga pada event POMNas ke XVII Muhammad Iqbal dan Choififah Nanda Khairani yang merupakan mahasiswa/i dari Universitas Riau meraih juara 3 dan mendapatkan mendali perunggu.

Pelatihan Fisik Atlet Tenis Lapangan Dalam Menghadapi Event POMNas XVIII Kalimantan Selatan Tahun 2023 Iqbal, Muhammad; Lardika, Rola Angga; Agust, Kristi
Jurnal Akuntansi Hukum dan Edukasi Vol 2, No 1 (2025): Mei 2025
Publisher : CV. Rayyan Dwi Bharata

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57235/jahe.v2i1.6157

Penelitian ini dilatarbelakangi oleh permasalahan mengenai Latihan-latihan yang mampu meningkatkan fisik bagi para atlet tenis lapangan dalam mempersiapkan POMNas XVIII di Kalimantan Selatan tahun 2023. Penelitian ini bertujuan untuk mengetahui apa saja latihan fisik yang dilakukan oleh para atlet dalam meningkatkan fisiknya untuk mengikuti event POMNas XVIII yang berlangsung pada tanggal 12 – 22 November 2023. Penelitian ini menggunakan metode observasi yang Dimana Teknik pengumpulan datanya menggunakan dokumentasi yang merupakan sumber informasi yang diperlukan oleh peneliti. Selanjutnya dokumentasi dapat diartikan sebagai teknik pengumpulan data melalui bahan-bahan yang tertulis. Hasil penelitian ini menunjukkan bahwa latihan fisik yang dilakukan para atlet sebelum mengikuti event POMNas ke XVIII mampu menigkatkan fisik atlet saat bertanding. Sehingga pada event POMNas ke XVII Muhammad Iqbal dan Choififah Nanda Khairani yang merupakan mahasiswa/i dari Universitas Riau meraih juara 3 dan mendapatkan mendali perunggu.

Relationship between upper limb strength and forehand stroke outcomes in junior tennis players Amanda, Rendy; Agust, Kristi; Lardika, Rola Angga
Jurnal Patriot Vol 7 No 3 (2025): Jurnal Patriot
Publisher : Department of Coaching, Faculty of Sports Science, Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/patriot.v7i3.1168

Problems: The performance of a tennis forehand stroke is influenced by several physical components, yet the specific contribution of hand muscle strength and arm power remains underexplored in junior athletes. Purpose: This study aims to determine the relationship between hand muscle strength and arm power with forehand stroke results in junior tennis athletes at the ATN Pekanbaru Club. Methods: A correlational research design with a survey method was employed. The population consisted of 13 junior athletes, and due to the small size, total sampling was applied. Instruments used included a handgrip dynamometer to measure hand muscle strength, a medicine ball put test to assess arm power, and a forehand accuracy test adapted from the physical test and tennis court guidebook. Data were analyzed using Pearson’s product moment correlation and multiple regression analysis. Results: Results showed a significant correlation between hand muscle strength and forehand results (r = 0.831), as well as between arm power and forehand results (r = 0.869), both exceeding the critical value r (0.5) (13) = 0.553. Simultaneously, both variables demonstrated a significant relationship with forehand performance (Fcount = 16.338 > Ftable = 4.103; r = 0.875). Conclusion: These findings suggest that hand muscle strength and arm power play critical roles in the effectiveness of forehand strokes in junior tennis athletes. However, the study is limited by its small sample size and focus on a single club. Future research should consider larger and more diverse samples while also examining additional biomechanical or technical factors to develop a more comprehensive model of junior tennis performance.

Peran Kegiatan Workshop Penggunaan Aplikasi Canva Terhadap Keterampilan Digital Siswa Sekolah Dasar Habibah, Aisyah; Inaya, Firza; Maulana, Maulana; Mediyana, Mediyana; Harahap, Raka Ikhwanul Azmi; Nurliza, Tiara; Pitri, Yola Destia; Erlisnawati, Erlisnawati; Lardika, Rola Angga; Maesaroh, Siti
Jurnal Pengabdian Masyarakat Bangsa Vol. 3 No. 9 (2025): November
Publisher : Amirul Bangun Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59837/jpmba.v3i9.3409

Canva merupakan aplikasi desain grafis yang cukup sederhana dan mudah digunakan. Melalui Program PLP Merdeka Belajar Kampus Merdeka (MBKM) memberikan kesempatan bagi Mahasiswa Universitas Riau tahun 2025 dalam hal pengabdian dengan berkontribusi langsung dalam bidang pendidikan, yaitu dengan memberikan pelatihan kepada siswa Sekolah Dasar. Metode yang digunakan adalah metode observasi dan dokumentasi terhadap siswa kelas 6D. Kegiatan Workshop penggunaan aplikasi Canva untuk siswa Sekolah Dasar ini dapat menggambarkan secara komprehensif mengenai keterampilan digital siswa Sekolah Dasar. Adapun setelah dilakukannya kegiatan Workshop penggunaan aplikasi Canva ini, siswa Sekolah Dasar sudah dapat mengakses fitur-fitur yang terdapat pada aplikasi Canva, serta sudah dapat membuat desain grafis berupa slide presentasi yang kreatif dan inovatif sesuai dengan konsep. Dengan begitu, melalui kegiatan Workshop penggunaan aplikasi Canva ini menunjukkan hasil yang positif terhadap siswa Sekolah Dasar, yang akhirnya siswa Sekolah Dasar mengetahui bahwa melalui alat elektronik yang siswa Sekolah Dasar miliki berupa laptop dan handphone, siswa Sekolah Dasar dapat menggunakannya secara positif dan produktif dengan membuat suatu hasil karya desain grafis yang kreatif dan inovatif.

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