BIOL lab report week 4.docx - Using finger and grip strengths to figure out how muscle works and fatigue happens SeungJoo Yi Introduction Grip and

# BIOL lab report week 4.docx - Using finger and grip...

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Using finger and grip strengths to figure out how muscle works and fatigue happens SeungJoo Yi 04/16/2016
Introduction: Grip and finger strengths are important for all humans in their daily lives. One cannot clean his or her body or write something if one doesn’t have grip and finger strengths. It is important for humans to have enough power in hands to perform the activities that are essential to live such as eating, wearing clothes, holding stuffs, and working. Today’s experiment is to examine grip and pinch strengths and compare those by various means. Materials & Methods Hand Dynamometer and the EKG sensor that are connected to the Vernier computer interface will be used for all parts of the experiment to measure the hand strengths. Part I-1 Dominant hand’s pinch strength data was collected for each of the four fingers and mean force was recorded. Part I-2 Hand grip strengths for both hands were collected from each student in the lab. The results were collected on the board. Class grip strength data was analyzed by gender, dominance of hands, and heights. Part II-1. One person in the group’s grip strength was measured for 100 seconds without tester’s watching of the output on the monitor screen. Part II-2 Same person’s grip strength was measured for 100 seconds, with the person viewing the screen after 80 seconds this time. Part II-3 Same person’s grip strength was measured with interval (2 grips per second for 100 seconds) without the tester’s viewing of the screen. Results Part I-1
The result of the author’s grip strength data was as follows. Table 1-Individual Grip strength Data Max force (N) Mean force (N) Right hand grip strength 140.9 133.8 Left hand grip strength 118.4 107.2 Table 1. Individual grip strength of both hands (maximum and mean force in (N)) The mean force of right hand grip was stronger than that of left hand for the author. Below is the actual graph of the author’s grip strength in both hands. Graph1. Individual’s grip strength comparison on both hands. Part I-2 The result of class grip strength data when sorted by gender was as follows. Table 2- Class Grip Strength Data Average mean force (N) Males (dominant hand grip strength) 214.35 Females (dominant hand grip strength) 156.24 Table 2. Class average grip strength of dominant hand when sorted by their gender. The males’ grip strength average was much higher than that of females when compared. The result of class grip data when sorted by handedness was as follows.
Table 3- Class Grip Strength Data Avg mean force (N) Right hand Left hand Right-handed individuals 162.99 150.65 Left-handed individuals 126.8 171.2 Table 3. Class average grip strength of right and left hand when sorted by handedness.

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