Biology · Oct / Nov 2025 · Paper 62 · Question 2
0610
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Plan an investigation to determine the effect of exercise intensity on heart rate in humans. [6]
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1 independent variable
different intensities of exercise / different exercises / exercise for different lengths of time ;
2 dependent variable
after / during, exercise measure, heart rate / pulse rate ;
3 and 4 detail of method ;;
description of named exercise of different intensities
ensuring heart rate returns to resting rate
use of a heart rate monitor
5, 6 and 7 constant variables ;;;
same speed / distance / time, of exercise
same age of people
same sex of people
same, person / fitness level / mass of person / height of person / BMI
same, place / time of day / temperature / weather
8 at least three trials / two more repeats ;
9 relevant safety precaution ;
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