Heart Rate Recovery Study

A sports scientist conducted an experiment to investigate the recovery rate of athletes after high-intensity exercise. They used a sample of 16 elite runners in a crossover design. All participants performed a standardized treadmill sprint test under two different recovery protocols:

Protocol A (Passive Recovery): Participants sat quietly in a chair for 5 minutes post-sprint.
Protocol B (Active Recovery): Participants jogged at a light pace for 5 minutes post-sprint.

Table 1: Mean reduction in heart rate (bpm) and standard deviations

	Protocol A (Passive Recovery)	Protocol B (Active Recovery)
Mean	41.6	54.3
Standard deviation	12.8	4.1

What do the standard deviations in Table 1 suggest about the two recovery protocols?

Heart Rate Recovery Study

Protocol A (Passive Recovery): Participants sat quietly in a chair for 5 minutes post-sprint.
Protocol B (Active Recovery): Participants jogged at a light pace for 5 minutes post-sprint.

Table 1: Mean reduction in heart rate (bpm) and standard deviations

	Protocol A (Passive Recovery)	Protocol B (Active Recovery)
Mean	41.6	54.3
Standard deviation	12.8	4.1

What do the standard deviations in Table 1 suggest about the two recovery protocols?

Data handling and analysis

Question 59

Heart Rate Recovery Study

Table 1: Mean reduction in heart rate (bpm) and standard deviations

Markscheme

Data handling and analysis

Question 59

Heart Rate Recovery Study

Table 1: Mean reduction in heart rate (bpm) and standard deviations

Markscheme

Data handling and analysis

Question 59

Heart Rate Recovery Study

Table 1: Mean reduction in heart rate (bpm) and standard deviations

Data handling and analysis Questions

Data handling and analysis

Question 59

Heart Rate Recovery Study

Table 1: Mean reduction in heart rate (bpm) and standard deviations

Data handling and analysis Questions