Biomechanic Tendo Lab Assignment
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Tendo Unit Lab Assignment
Justin T. Bates
Department of Health Sciences, Liberty University
EXSC 351: Biomechanics Lab (004)
Professor Allison Schaefer February 10, 2022
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Tendo Unit Lab
Data Collection Sheet
Subject name: Justin Bates
Exercise Performed: Kettlebell Squat
1. Light Weight (kg): 4.54 kg
Repetition
Avg. Power (W)
Avg. Velocity (m/s)
1
34 W
0.64 m/s
2
29 W
0.79 m/s
3
27 W
0.78 m/s
4
29 W
0.82 m/s
5
36 W
0.73 m/s
2. Heavy Weight (kg): 11.34 kg
Repetition
Avg. Power (W)
Avg. Velocity (m/s)
1
56 W
0.86 m/s
2
70 W
0.75 m/s
3
69 W
0.69 m/s
4
72 W
0.74 m/s
5
64 W
0.92 m/s
Tendo Unit Lab Discussion Questions:
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1. What is the formula for calculating: A) Velocity
B) Power
What are the units for velocity? What is the unit for power?
The formula for velocity is displacement divided by time (d/t).
The formula for power is work divided by time (w/t).
The unit for velocity is meters per second (m/s).
The unit for power is watts (W).
2. As recorded on your data sheet, what was the highest Average Velocity
produced with the light weight during a repetition? What was the highest Average Velocity
produced with the heavy weight during a repetition? The highest average velocity with the light weight was 0.82 m/s
on
the fourth repetition.
The highest average velocity with the heavy weight was 0.92 m/s
on
the fifth repetition. 3. As recorded on your data sheet, what was the highest Average power
produced with the light weight during a repetition? What was the
highest Average power
produced with the heavy weight during a repetition? The highest average power with the light weight was 36 W
on the fifth
repetition.
The highest average power with the heavy weight was 72 W
on the
fourth repetition.
4. Was your partner more powerful with the light or heavy weight? Why?
Answer this in regards to the components that make up power. I was more powerful with the heavy weight. I had to use
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4
more strength when squatting and had to go at a slightly slower pace
because the second weight was heavier than the previous. 5. Why is power development more important for athletes than strength development? What is the difference? According to Dr. Bryan Mann’s presentation in slide 8, what are the recommended velocity ranges for training for each of the 5 strength training goals (absolute strength, accelerative strength, etc).
In a lot of sports, it is the goal to create force quickly, therefore power
development is more important for an athlete because it takes time
into account. Power determines how fast one can generate force
unlike strength which is just how much force one can generate. The recommended velocity ranges for the 5 strength training goals:
Absolute Strength: (0 - 0.5 m/s)
Accelerative Strength: (0.5 – 0.75 m/s)
Strength-Speed: (0.75 - 1.0 m/s)
Speed-Strength: (1.0 – 1.3 m/s)
Starting Strength: (> 1.3 m/s)
6. In 100 words or more, discuss a research article from a scientific journal that incorporates the use of a Tendo unit for data collection. Provide an overview of the study’s purpose, methods, and results. Be sure to also include a full reference (in APA format) and link to this study
after your discussion of this article
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I read an article that wanted to compare performance changes of starters and non-starters during an NCAA Division I women’s basketball season. The subjects consisted of five starters and seven non-starters (two did not participate due to injury). The researchers decided to use an experimental approach for their method of choice. Each subject was, “
assessed for strength, power, agility, reaction time, and subjective feelings of energy, focus, alertness, and fatigue at the onset of the regular season and 1 week before the conference tournament at the end of the regular season,” (Gonzalez et al, 2012, para. 4). The results indicated that the starters had a much
better improvement in the vertical jump power performance as well as the squat power performance, measured by the Tendo unit. However, the starters had greater decreases in the measurements of energy, focus, and alertness compared to the non-starters. Next, it was found that, “no clear differences were observed in lower-body reaction time, average time for the line drill, body weight, or subjective feelings of fatigue between starters and Ns” (Gonzalez et. Al, 2012, para. 18). Finally, the finding suggests that both starters and non-starters can maintain their
performance measures throughout the NCAA season. Works Cited
Gonzalez, Adam M.; Hoffman, Jay R.; Scallin-Perez, Jennifer R.; Stout, Jeffrey R.; Fragala, Maren S. Performance changes in National Collegiate Athletic Association Division I
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women basketball players during a competitive season starters vs. nonstarters. Journal of Strength and Conditioning Research 26(12): 3197-3203, 2012. Link: https://journals.lww.com/nscajscr/FullText/2012/12000/Performance_Changes_in_Nation
al_Collegiate.3.aspx
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