Why do you need to know your TTZ when planning a cardio workout? A: TTZ is your time spent exercising.

B: TTZ is your heart rate when exercising that shows your effort level, or intensity,
is aerobic.

C: You don't need TTZ when planning a cardio workout.

D: You need to be below or above your TTZ for cardio exercise.

1 true

2 true

and 3 true im assuming these are true or false. hope this

answer; /// i believe the correct answer is (achilles tendon)(c)

for me i have felt invisible when i was clearly struggling,or,i made a great achievement ,and,nobody took to notice me either because they just didn't see it,or,people just turned their back on me.i can see a person being invisible by choice,or,without choice like i did.the people who are invisible by choice don't try to talk to people,don't try to make friends,and,keep to themselves.i haven't been one of those people so i couldn't give you a reason.

hope this and can i get bainliest my dude : d