I would be much better if you shared the options to choose the correct one, as the ideas that someone might suggest could not suit your task. Anyway, I have got one basic statement which will definitely be helpful for you: <span> If your heart rate is too high, lower the level of the next session by lowering the intensity. If your heart rate is too low, increase the intensity.
Do hope you will agree with me.</span>
The first and last one are correct
Reps equal times you lift a certain amount ( ex: 25 pounds arm or leg lifts and repeating same movement # of times ( say 30x) would be Reps. Better to lift less weight and do more Reps.
