Analysis of biceps brachii muscle under different intensity trainings in 12 weeks – A guide for self-fitness

• Main Authors: Chia-HuaHsu, 許佳華
• Other Authors: Wun-Yu Su
• Format: Others
• Language: en_US
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/69641692331883521342

碩士 === 國立成功大學 === 資訊工程學系 === 103 === Traditional fitness requires an instructor to guide the trainee one by one, while the fitness instructor usually guides the trainee by observing their behavioral outcomes. Instead of adjusting the training intensity according to the trainees’ current physiological status, the trainee is usually asked to follow the standardized training program. The objective of this study was to develop a biofeedback training system that responsively adjusts the training intensity according to the trainees’ instant physiological status. In this study, sixteen healthy and untrained males (N = 16, 22.5 ± 2.0 years; 173.0 ± 5.9 cm, 65.3 ± 7.3 kg) participated in a program consisted of a proposed 10 repetition maximum (10-RM) biceps brachii curls protocol. Subjects undertook s sessions of biceps brachii curls training per week for 12 weeks. Two experimental groups were designed either to perform 3 complete sets of 10 repetitions (Fatigue Group) or perform 3 incomplete sets of 10 repetitions (Unfatigue Group), that is, the repetitions of set 2 and set 3 will be determined by the previous state of muscle conditions of subjects (manual mark). Here, surface EMG was measured and analyzed to identify the muscle conditions. During the12 weeks training, the measurement of MVC (before and after), growth of 10 RM load, arm circumference (relaxed and forced) of biceps brachii muscle, and muscle mass of arm, were evaluated. Data were statistically analyzed using two-sample t-test. The alpha level was 0.05. Results between Fatigue group and Unfatigue group showed respectively that (1) 10-RM improved 19.31% and 20.33% (p = 0.78) (2) MVC-before improved 8.25% and 10.28% (p = 0.61); MVC-after improved 5.72% and 4.48% (p = 0.68) (3) arm circumference-relax improved 2.10% and 2.71% (p = 0.60); arm circumference-force improved 1.06% and 1.14% (p = 0.91) (4) muscle mass improved 1.55% and 1.74% (p = 0.86). The results showed that there were no significant differences between two groups. Therefore, this study showed strong evidences that the proposed training program (according to the trainer’s current muscle condition) not only achieve the similar gain of strength (compared to the Fatigue Group), but also decreases the risk of overtraining. Therefore, the training method of Unfatigue Group was suggested for untrained men for self-fitness. *RM (Repetition Maximum) *MVC (Maximum voluntary contraction)