# Changes in Cardiovascular Endurance:

Changes in Cardiovascular Endurance:

Purpose:

To observe changes in cardiorespiratory endurance over a 3-year span of preadolescence, noting any gender differences.

Aerobic capacity—the ability to perform prolonged moderate physical activity—is typically measured by maximal oxygen uptake, or V.O2max. In this lab, you will analyze children’s scores on a test of prolonged moderate activity—the Progressive Aerobic Cardiovascular Endurance Run (PACER), which is part of Fitnessgram, a comprehensive health-related fitness and activity assessment. The PACER is a test of aerobic capacity that is easy at the beginning and gets progressively harder. Children run back and forth between two lines set 22 yd (20 m) apart. After a starting signal, children must reach the other line before a beep sounds. They cannot turn to run back to the first line until that beep. The interval between beeps shortens after each minute. The number of laps, or trips between lines, is counted as the score. Participants continue until the second time they do not reach a line before a beep sounds.

Instructions

- Table 1.1 provides PACER scores from five girls for each of 3 consecutive childhood years, then 2 teenage years. Using either a calculator or a computer program such as Excel, calculate the average score for the girls for each year.
- Table 1.2 provides PACER scores from five boys for each of 3 consecutive childhood years, then 2 teenage years. Using either a calculator or a computer program such as Excel, calculate the average score for the boys for each year.
- Design a graph and plot the girls’ PACER scores over the 5 years. Plot each individual’s scores, and plot the average score. Do the same on another graph for the boys’ PACER scores.
- Complete the Lab Questions. Submit the answers to the questions with the data calculations and graphs.
- This assignment is due on March 23, 2021 at 11:00 AM.

Table 1.1 Pacer scores for girls

Year 1 | Year 2 | Year 3 | Year 4 | Year 5 | |

Girls’ PACER performance (laps) | |||||

Participant | Age 9 | Age 10 | Age 11 | Age 13 | Age 14 |

Girl 1 | 28 | 36 | 45 | 30 | 48 |

Girl 2 | 22 | 40 | 46 | 35 | 45 |

Girl 3 | 35 | 41 | 45 | 40 | 42 |

Girl 4 | 30 | 27 | 44 | 35 | 43 |

Girl 5 | 18 | 38 | 46 | 48 | 50 |

Group Average |

Table 1.2 Pacer scores for boys

Year 1 | Year 2 | Year 3 | Year 4 | Year 5 | |

Boys’ PACER performance (laps) | |||||

Participant | Age 9 | Age 10 | Age11 | Age 13 | Age 14 |

Boy 1 | 50 | 53 | 60 | 65 | 80 |

Boy 2 | 53 | 60 | 68 | 70 | 75 |

Boy 3 | 34 | 36 | 48 | 50 | 55 |

Boy 4 | 40 | 45 | 39 | 55 | 60 |

Boy 5 | 41 | 45 | 65 | 70 | 80 |

Group Average |