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Fatigue in brachii muscles is an important aspect of human physiology and can be observed via various tools including surface electromyography (sEMG) and mechanomyography (MMG). Fatigue could occur due to static, intermittent or dynamic contractions. A lot has been done in static and intermittent scenario, and is well developed area. Assessment of muscle fatigue during dynamic contractions using sEMG and MMG is still under question. It is an undeveloped area and much work is needed in it. sEMG and MMG are two most important tools that have been used by researchers for the assessment of muscle activity, particularly fatigue. The objective of this study is to analyse the literature for fatigue analysis in upper brachii muscles during dynamic contractions using EMG and MMG. The literature shows that these two techniques provide reasonable approximation to muscle fatigue but a lot is still uncovered. During dynamic contractions, signal contamination is a big problem in both techniques and proper precautionary measures are needed to be taken before data processing.