When Jennifer is seen hanging over the side of hill after falling over from being pushed during an exercise demonstration, the legs and feet are obviously a stunt double, not Stefanie Powers.
Marilyn is seen taking Betsy's blood pressure, but she doesn't use a stethoscope, she doesn't use the bulb to inflate the cuff.
Marilyn is seen taking Betsy's blood pressure, but she's not using a stethoscope, she doesn't use the bulb to inflate the cuff, she doesn't look at the reading on the cuff, doesn't release the pressure of the cuff and the scene isn't long enough for all of that to happen.