Deep knee bends help TO BUILD MUSCLES AND TO BURN FAT.
A deep knee bend refers to a full squat. It is a strength training exercise that effectively burn fats. Engaging in deep knee bend exercise also have beneficial effects on the back of the thighs, the front of the thighs, the gluteal muscles of the buttock, the hip and the calf muscles.
Answer : (b). 105 bpm
Explanation :
given that,
Age = 40 years-old
Resting heart rate = 75 bpm
We know that,
Maximum heart rate = 220- Age
Maximum heart rate = 220-40 = 180 bpm
Heart rate reserve = Maximum heart rate - Resting heart rate
Heart rate reserve = 180 bpm - 75 bpm
Heart rate reserve = 105 bpm
Hence, this is the required solution.
(I know this bc I've done this question.)
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builds muscle and increases metabolism (i think) enhances immune system
correct me if im wrong