# Lab Report: the Effects of Arm Length on Maximum Power

Aim:

To investigate the effect on maximum power, when the proportion of arm length to body height is changed.

Hypothesis

I predict that the increase of proportion linking arm-span to body-height will increase the maximum power. Although the increase of arm-span also corresponds to the increase in weight, this will have minimal effect, (due to limitations). If the proportion is large, this will mean that the thrust force of the body during exercise will be more, since the moving arms add to the force forwards, therefore increasing the maximum power.

Independent Variable

• Proportion linking Arm-span to height e.g. height (cm)/arm-span (cm)

Dependent Variable

• Maximum power (watts)

Controlled Variables

• Ground Surface

• Age (approximate).

• Lung Capacity (approximate)

• Garments

• Temperature of setting

• Measuring experiment

• Gender

• Ethnicity

• Body type

Uncontrollable Variables

• Temperature

• Effort during exercise e.g. use of arm thrust.

• Existing fatigue

• Physical injuries

• Health problems

Apparatus

|Apparatus |Designated Brand |Amount | |400m track | |1 | |Wooden, Meter Stick |‘ใช้เพื่อการศึกษา’ (for education) |2 | |Athletes | |7 | |Empty results table (shown below) | |2 | |Cones | |2 | |Stopwatches |Unilab 513.051 |2 | |Pencil | |2 | |Meter Wheel/Long distance measuring equipment |Stanley |1 | |Weight scales (kg) | |1 |

Method

Procedures to Display Data:

1. Construct a table on a blank sheet of paper. Shown below.

|Athlete |Height (cm) |Arm length (cm) |Weight (kg) | Arm length to height Proportion | |A IW | | | | | |B JC | | | | | |C JT | | | | | |D JV | | | | | |E SB | | | | | |F AJ | | | | | |G BC | | |...

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