Answer:
Wrist and chest Monitor
Explanation:
The wrist and Chest Monitor would be the most useful in determining whether you are staying within your target heart rate zone during a workout because during workout or any kind of activity to get the heart rate of an individual it is mostly gotten from the chest and wrist of the individual.
Calorimeter is used to measure the amount of calories in the body or the amount of calories burnt during workout of the individual while the wrist and chest monitor measures the heart rate.
Do have a picture of the diagram
For Building Muscle, Getting “Toned,” And Improving How Your Body Looks… Resting 1-3 minutes between sets is probably ideal for you. The higher your training intensity is for a given exercise and/or the more demanding it is on your body, the more you should stay nearer to the 2-3 minute range.
Either mechanical or physical. I would say physical though.
