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Comparative study of diet variability on isotonic muscle contraction in adolescent students

Yathish T R, Sudharshan C R, Mamatha B S, Sudha V R, Divyashree B H.


Abstract

Background: Isotonic muscle contraction creates force and helps to perform work like moving load. Various factors are found to affect performance of the skeletal muscle such as age, gender, height, weight, physical build, training, and race. Physical activity, exercise, and diet habits are day-to-day behavior that affects work done and health. Onset of fatigue is affected by motivation, degree of work, duration of work, and blood supply of exercising muscle. Only few studies have been conducted to show effect of gender and diet variation on work done and performance of skeletal muscle.

Aim and Objective: This study aims to compare the effect of gender and diet variability on isotonic muscle contraction in adolescent students.

Materials and Methods: This comparative study was conducted from May 2020 to April 2021. One hundred and fifty healthy adolescent male and female students aged 17–21 years were selected by convenience sampling. Approval from the Institutional Ethical Committee (IEC/HIMS/RR123/22-05-2020), informed consent from participants was taken. Subjects contract flexors of the right hand middle finger against resistance using Mosso’s Ergogram, till fingers get fatigued and can no longer lift load. Then, work done was calculated for flexor muscle. Data were statistically analyzed.

Results: Work done using Mosso’s Ergography was higher in males when compared to females (P < 0.00001). There was no statistically significant difference in work done between vegetarians and non-vegetarians (P > 0.05). Work done during intact blood supply was greater than during venous and arterial occlusion (P < 0.00001).

Conclusion: Muscle performance was more in males due to height, weight, and hormonal effect. Work done during intact blood flow was better than during restricted blood flow. However, there was no statistically significant difference in work done between vegetarians and non-vegetarians.

Key words: Isotonic Muscle Contractions; Work Done; Gender; Body Mass Index; Vegetarian; Non-Vegetarian; Fatigue






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