Answer:
Stage 3
Explanation:
Sensorimotor stage is the time period between birth to 2 years. Jean Piaget expanded the sensorimotor stage into 6 stages:
- Stage 1: Birth- 1 month: Exercise and organize reflexes like sucking, looking, grasping etc.
- Stage 2: 1-4 months: Adapt to the environment
- Stage 3: 4-8 months: Repeat interesting events involving other objects or people to make them last.
- Stage 4 : 8-12 months: Goal directed behavior and development of new motor skills
- Stage 5: 12-18 months: Try to inculcate new behavior
- Stage 6: 18-24 months: Develop ability to solve problems
<span>Heart Rate Reserve, HRR. Heart rate reserve (HRR) is the difference between resting heart rate (HR<span>rest) and maximum heart rate</span> (HRmax). Heart rate reserve is used when determining exercise heart rates. The Karvonen formula is used to calculate exercise heart rate at a given percentage training intensity.</span>
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