Abstract

EFFECT OF SEASONAL VARIATION ON SHARIRIK BALA (PHYSICAL STRENGTH): AND ANALYTICAL REVIEW WITH REFERENCE TO AYURVEDIC AND MODERN PERSPECTIVES

Dr. Manisha Yadav*, Prof. Ashok Kumar Sharma

Abstract

Ayurveda emphasizes that health and disease are influenced not only by internal factors but also by external environmental changes, particularly Ritu Parivartana (seasonal variation). Sharirika Bala, the physical and immunological strength of an individual, fluctuates naturally with these seasonal transitions. The Ayurvedic concept of Kalaja Bala describes this cyclic alteration in strength, aligning closely with modern scientific understanding of circannual biological rhythms. To critically analyze the effect of seasonal variation on Sharirika Bala from both Ayurvedic and modern scientific perspectives and to explore the physiological and preventive implications of this relationship. This analytical review draws upon classical Ayurvedic texts (Charaka Samhita, Sushruta Samhita, and Ashtanga Hridaya), standard commentaries, and contemporary biomedical research available in indexed journals. Concepts such as Ritucharya, Agni, and Ojas were compared with modern findings related to immune modulation, metabolism, and gene expression across different seasons. Ayurvedic literature describes that Bala is highest during Hemanta and Shishira Ritus, moderate in Vasanta and Sharad, and lowest in Grishma and Varsha due to environmental influences on Agni and Dosha balance. Modern studies similarly reveal seasonal changes in immune gene expression, hormonal activity, and physical performance, indicating enhanced immunity and metabolism during cooler months and reduced efficiency during warmer periods. These parallels demonstrate the physiological basis of Kalaja Bala and the preventive relevance of Ritucharya. Seasonal variation exerts a significant influence on Sharirika Bala, validating the Ayurvedic notion of time-dependent physiological adaptability. Integrating Ritucharya and Rasayana Chikitsa with modern preventive health approaches offers a holistic framework for maintaining optimal strength and immunity throughout the year.

Keywords: Sharirika Bala, Kalaja Bala, Ritucharya, Seasonal Variation, Vyadhikshamatva, Ayurveda, Circannual Rhythm, Immunity.