J.W.
Hi S.-
I'm going to chime in too here as I specialize in pre and postnatal health and fitness and am a Master Trainer and teach other health and fitness professionals on prenatal fitness through Healthy Moms(R) Fitness www.healthymomsfitness.com The 140HR rule has been outdated since 1994!!! The guidelines state that if you can still say 3-5 words in one sentence you are working out hard enough..this is known as the talk test. If you can hold a conversation, then you are not working out hard enough, if you are out of breath, too hard. Safe exercise is 3-5 days per week 30-45min each session. So save your money and get yourself a prenatal massage, well-deserved and money will be well spent! :)
Enjoy!
J. W. MPH
Wellness Edcuator