14.Zero the readings for the Hand Dynamometer.a.Hold the Hand Dynamometer along the sides, in an upright position. Do not put any forceon the gray pads of the Hand Dynamometer.b.When the readings stabilize, choose Zero from the Sensors menu. The readings for the sensor should be close to zero.15.Start data collection. Instruct the subject to immediately pinch the end of the sensor between the pads of the thumb and forefinger of his or her dominant hand, and hold for 5 seconds. 16.Instruct the subject to switch to successive fingers every 5 seconds. Data collection will stop after 20 seconds. 17.Determine the mean force applied during each pinch.a.Tap and drag across the first plateau on the graph, to select the data representing the pinchstrength of the thumb and index finger (see Figure 4). b.Choose Statistics from the Analyze menu and record the mean pinch strength to the nearest 0.1 N in Table 5.c.Choose Statistics from the Analyze menu to turn off statistics.d.Select the data in the second plateau, representing the pinch strength of the thumb and middle finger. Choose Statistics from the Analyze menu. e.Record the mean pinch strength to the nearest 0.1 N in Table 5.f.Choose Statistics from the Analyze menu to turn off statistics.g.Repeat this process to obtain statistics for the remaining two pinch strengths..Figure 3 Figure 4
16 - 4Human Physiology with VernierLabQuest 16DATATable 1−Individual Grip Strength DataMaximum force (N)Mean force (N)Right hand grip strength192.6178.1Left hand grip strength186.9169.3Table 2−Class Grip Strength DataAverage mean force (N)Males (dominant hand grip strength)219.67Females (dominant hand grip strength)118.90Table 3−Class Grip Strength DataAverage mean force (N)Right handLeft handRight-handed individuals115.9102.28Left-handed individuals138.83141.16Table 4−Class Grip Strength DataHeight (rounded to nearest inch)Average mean grip strength of dominant hand(N)1.52 m (5’) or below83.731.55−1.63 m (5’1”−5’4”)117.571.65–1.73 m (5’5”−5’8”)173.78 1.75–1.83 m (5’9”−6’)210.61.85 m (6’1”) and above264.25
Human Physiology with Vernier16 - 5Grip Strength ComparisonTable 5−Individual Pinch Strength DataMean force (N)Dominant hand index finger50.8Dominant hand middle finger63.1Dominant hand ring finger54.0Dominant hand little finger29.8DATA ANALYSIS
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Left-handedness, Ring finger, Handedness, Hand Dynamometer