If they have a low self esteem it could make the mood bad and spread to the other person eventually, it can also lead to depression and high self esteem brings positive vibes to everyone, but you don't want too much of it or you could seem stuck-up, if someone tries complementing your dress don't go oh well I'm too fat in it, or yeah it looks so good on me, no one else it would look good on. Just say thanks! And give yourself complements if your feeling down :)
Photoplethysmography is used to track of heart rate during a workout
Muscular strength is how much you can lift/push/pull, ect. Muscular endurance is how long you can do something with your muscles. Like if you have to put your are straight out in front of you and hold a 25 pound dumbbell. Your will get tired and give out. the more Muscular endurance you have the longer you can do something with your muscles.
