One exercise that should be included is stretching before and after
Do they work you mean?? Different variations of the position of your hands hits different muscle parts. Like doing push-ups with your hands far apart hits more of the chest area. Doing them with your hands close hits more of your triceps. I personally like them close.
C because reversibility means when taking a break it'll be hard to get back on schedule <span />
The answer is true, you can use both
False, that would be very rude to your partner.
