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PENGARUH AKTIVITAS FISIK TERHADAP PRODUKSI ASI PADA IBU MENYUSUI Berkat Turil Bewamati Zebua; Dominggos Simanjuntak; Arif Sianipar; Muhammad Raihan Aditya; Nurhamida Sari Siregar; Randi kurniawan
Jurnal Keluarga Sehat Sejahtera Vol. 24 No. 1 (2026): JURNAL KELUARGA SEHAT SEJAHTERA (In-Press)
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/

Abstract

Exclusive breastfeeding (ASI) for the first six months of a baby’s life is a fundamentalhealth intervention recommended by the World Health Organization (WHO). Thesuccess of the breastfeeding process is crucial for the optimal health and developmentof the infant, as breast milk not only provides complete nutrition but also essentialantibodies. Breast milk production is influenced by various factors, includingphysiological conditions, such as the balance of the hormones prolactin and oxytocin,as well as psychological factors like stress and fatigue. Among these various factors,physical activity performed by mothers during the breastfeeding period plays as significant role, although the perception regarding its effect remains diverse among thepublic. This study aims to comprehensively describe the influence of physical activityon breast milk production in nursing mothers. The method used is descriptive qualitative through a literature review of various relevant scientific books and journals.The review results indicate that light to moderate intensity physical activity significantly supports the increase in breast milk production. This benefit is achieved through several mechanisms, including improved blood circulation throughout the body, including the breasts, which optimizes the supply of oxygen and nutrients to the mammary glands. Furthermore, regular physical activity helps balance the hormones prolactin (which stimulates milk synthesis) and oxytocin (which plays a role in the milk ejection reflex). From a psychological perspective, physical activity is proven effective in reducing levels of stress, anxiety, and postpartum depression. This stable psychological condition is crucial because stress is known to inhibit breast milk production. Conversely, excessive physical activity can have a negative impact by causing exhaustion, dehydration, and a reduction in energy reserves, which can ultimately decrease the volume of breast milk. Therefore, nursing mothers are advised to choose physical activities such as walking, light aerobics, or yoga, and to adjust the intensity to their body's capacity. Education and guidance from health professionals are needed to ensure that nursing mothers understand the benefits and limitations of physical activity correctly.
Evidence-Based Analysis Of Basic Volleyball Training Methods: Focus On Overhand Serves And Underhand Passes Marta Aurelia Sitorus; Dwi Reva Nita Sela Br Tarigan; Erike Wanate Mahara; Delon Steven Bintang; Lewi Nababan; Deni Rahman Marpaung; Randi Kurniawan
STAMINA Vol 8 No 4 (2025): Journal of Stamina December Edition
Publisher : DEPARTEMEN KESEHATAN DAN REKREASI FAKULTAS ILMU KEOLAHRAGAAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jst.v8i4.1323

Abstract

This study analyzes the effectiveness of various volleyball basic technique training methods, focusing on overhead serves and underhand passes, through an evidence-based approach. This study was conducted to address the need for more adaptive technical training to meet the demands of modern play, given that conventional training approaches, which tend to be repetitive, still dominate and often fail to improve skill transfer to game situations. The analysis was conducted on a number of studies that highlighted variations in training methods, such as blocked practice, random practice, mixed practice, paired drills, small-sided games, and the use of mechanical and visual feedback. The main findings show that blocked practice is effective in the early stages of movement pattern formation, while random and game-based practice is superior in skill transfer and long-term retention. Partner drills are more effective at improving groundstrokes than individual practice, while mechanical feedback has been shown to be more accurate in improving the kinematic consistency of overhead serves than verbal instruction. This study confirms that the most effective training approach is the integration of stabilization of basic movement patterns, variation in training conditions, game context, and data-based technical feedback. The results of this study can be used as a reference for coaches, sports educators, and practitioners to design training programs that are scientific, applicable, and relevant to the characteristics of modern volleyball