Adisti Rahayu NIM P07134220001 Pengarang Jujuk Anton Cahyono, S.Si., M.Sc Dosen Pembimbing 1 Neni Oktiyani, S.Pd., M.Sc Dosen Pembimbing 2

ABSTRAK PERBEDAAN KADAR KALIUM SEBELUM DAN SESUDAH KONSUMSI MINUMAN ISOTONIK PADA ANGGOTA UNIT KEGIATAN MAHASISWA (UKM) OLAHRAGA BASKET JURUSAN TEKNOLOGI LABORATORIUM MEDIS Peneliti: Adisti Rahayu Pembimbing: Jujuk Anton Cahyono, Neni Oktiyani Kalium merupakan elektrolit utama cairan intraseluler (terutama otot) hampir sebanyak 98%. Fungsi kalium membantu dalam pengaturan keseimbangan cairan elektrolit tubuh. Penurunan kalium dari tubuh terjadi karena hilangnya kalium dari sel otot selama kontraksi berulang. Oleh karena itu, menjaga keseimbangan kalium sebagai komponen elektrolit tubuh selama berolahraga dapat melalui konsumsi minuman isotonik. Minuman isotonik adalah minuman yang mengandung ion-ion yang sama yang terdapat dalam darah dan sel tubuh sehingga mudah diserap tubuh. Penelitian ini bertujuan untuk mengetahui adanya perbedaan kadar kalium sebelum dan sesudah konsumsi minuman isotonik pada anggota Unit Kegiatan Mahasiswa (UKM) olahraga basket Jurusan Teknologi Laboratorium Medis. Penelitian ini bersifat eksperimen dengan rancangan one group pre-test post-test design. Populasi penelitian adalah anggota UKM olahraga basket Jurusan Teknologi Laboratorium Medis dengan sampel 30 orang menggunakan teknik total sampling. Rata-rata kadar kalium sebelum dilakukan perlakuan adalah 3,87 mmol/L dengan rentang 3,4-4,4 mmol/L, rata-rata kadar kalium sesudah perlakuan 4,32 mmol/L dengan rentang 3,9-4,8 mmol/L dan rata-rata selisih kadar kalium antara sebelum dan sesudah konsumsi minuman isotonik adalah 0,45 mmol/L. Analisis data menggunakan Dependent T-Test. Hasil penelitian menunjukkan adanya perbedaan kadar kalium sebelum dan sesudah konsumsi minuman isotonik dengan sig 0,000 (p<α). Kesimpulan penelitian ini adalah adanya perbedaan kadar kalium sebelum dan sesudah konsumsi minuman isotonik. Saran untuk penelitian berikutnya yaitu dapat mengukur kadar kalium sebelum berolahraga agar dapat diketahui seberapa besar penurunan kalium setelah olahraga. Kata Kunci: Olahraga, Kadar Kalium, Minuman Isotonik viii ABSTRACT DIFFERENCES IN POTASSIUM LEVELS BEFORE AND AFTER CONSUMING ISOTONIC DRINKS IN MEMBERS OF THE STUDENT ACTIVITY UNIT (UKM) BASKETBALL SPORTS DEPARTMENT OF MEDICAL LABORATORY TECHNOLOGY Author: Adisti Rahayu Adviser: Jujuk Anton Cahyono, Neni Oktiyani Potassium is the main electrolyte of almost 98% of intracellular fluid (especially muscle). The function of potassium helps in regulating the body's fluid electrolyte balance. Depletion of potassium from the body occurs due to loss of potassium from muscle cells during repeated contractions. Therefore, maintaining the balance of potassium as a component of the body's electrolyte during exercise can be done by consuming isotonic drinks. Isotonic drinks are drinks that contain the same ions found in the blood and body cells so they are easily absorbed by the body. This study aims to determine the differences in potassium levels before and after consuming isotonic drinks in members of the basketball sports UKM Department of Medical Laboratory Technology. This research is experimental by design one group pre-test post-test design. The research population was members of the basketball sports UKM Department of Medical Laboratory Technology with a sample of 30 people using the technique total sampling. The average potassium level before treatment was 3.87 mmol/L with a value range of 3.4-4.4 mmol/L, the average potassium level after treatment was 4.32 mmol/L with a value range of 3.9 4.8 mmol/L and the average difference in potassium levels between before and after consuming isotonic drinks is 0.45 mmol/L. Data analysis using Dependent T-Test. The results showed that there was a difference in potassium levels before and after consuming isotonic drinks with sig 0.000 (p<α). The conclusion of this study is that there is a difference in potassium levels before and after consuming isotonic drinks. Suggestions for future research are to measure potassium levels before exercising so that you can find out how much potassium decreases after exercise. Keywords: Sport, Potassium Levels, Isotonic Drinks