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Exercise:Positive Benefits, Force/Speed/Central Command Thry

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1. Briefly discuss the positive benefits of exercise on the brain and include how regular exercise maintains neuronal health.

2. Discuss the difference between force and speed of movement during muscular contraction.

3. Discuss what factors regulate heart rate during exercise. Stroke volume?

4. Explain the central command theory of cardiovascular exercise regulation during exercise.

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Solution Summary

This solution discusses the positive benefits of exercise on the brain and includes how regular exercise maintains neuron health. It discusses the difference between force and speed of movement during muscular contraction, and what factors regulate heart rate and stroke volume during exercise. It also explains the central command theory of cardiovascular exercise regulation during exercise. Links are included.

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1. Briefly discuss the positive benefits of exercise on the brain and include how regular exercise maintains neuronal health. 


Dr. John Ratey wrote Spark about this. He states that exercise "supercharges
Mental circuits to beat stress, sharpen thinking, enhance memory." Runner's World (Oct '11) also states that exercise builds neural pathways which helps in memory function. The New York Times (Reynolds, Gretchen 9/19/10) shows that fitter kids scored better on tests due to "significantly larger basal ganglia, a key part of the brain that aids in maintaining attention and the ability to coordinate actions and thoughts crisply". In the same article it states that the University of Illinois ran an experiment on 9 and 10 years and found that the fitter children scored better on complex memory tasks which implies a connection between activity and larger hippocampus. It appears being fit enhances neuro-recognition.
Regular exercise builds and maintains healthy neural functioning and pathways. It also slows the onslaught of Alzheimer's and dementia.


2. Discuss the difference between force and speed of movement during muscular contraction.

During muscular contraction the maximum velocity of muscle shortening is greatest at the lowest force. The greatest speed of movement is generated at the lowest workloads. The force -velocity relationship changes as athletes accelerate and decelerate. Force output of a muscle ...

Solution provided by:
Sally Baldwin, Ed.D
Education
  • BA, University of Southern California
  • MSS, United States Sports Academy
  • Ed.D, Boise State University
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