I'm not going to stir things up here, but whilst I respect both of you immensely, I am going to try and remain objective here

Books are just that. They're anatomy and case studies of people as well as knowledge of diet, which is ever evolving. Todays book however could be tomorrows partial misprint.
A link got posted on here a while back, to a study claiming Leg extensions cause Knee problems.
Most of what was said about not using Hip Flexors etc, I could agree with, but the test done to back this up, was rubbish in my opinion.
22 people, (small cross section), no stated age, weight, gender and overall health, split into 2 groups.
11 did Squats, 11 did Leg extensions. they all then ran on and off a step, which showed the Squatters had more mobility.
Apart from the omissions in participant stats I mentioned earlier, the biggest crime was the test was carried out on people with bad knees.
This doesn't prove Leg Extensions to be causal to bad Knees, only that they "may" aggrevate a pre-exisiting condition.
That's like trying to ascertain the effects of smoking on eyesight, by testing smokers who wear glasses. It looks invalidatory to me.
The problem in the studies case is, you can't have people with bad knees, in a test to ascertain things causal to disease of the Patella, you need people with healthy Knees.
If this, (in my view), poorly conducted study was in a textbook, being espoused to people like you Bonnie, then what would you learn? Something that might be misleading and may have been done to prove something, the studies creators might have wanted to prove, one way or another, which if so, creates a bias, in a situation where impartiality should be key to any study involving biological assessment.
The books you use may be well written, but they will never compensate for experience.
I did Reverse Bench Pressing once and felt it in the Biceps. I mentioned that on here and Swanso said you shouldn't feel it there. Some guy did it in my Gym the other day and said the same thing as me. He said he felt it in the Biceps. Is Swanso right then?
In my mind, what should be the case in such an instance, isn't necessarily the case in practice.
Medics read textbooks, but most Doctors might tell you, they start their first day and feel out of their depth, having to react quickly to real life things, forget things and soon realise the body is more than just diagrams, photographs and descriptions.
I appreciate what you are learning may be high quality, based on past studies, experience, years of learning and modified learning of technique, form and function, but just like medics, the practice of such learning isn't so straightforward.
What would happen if you had to train people with a Thyroid problem, or things like old injuries, that cause partial mobility in one Arm, or you had someone with a Prosthetic hand or lower Leg? What would the books say then?
I think you just need to be a little more conscious of other peoples experiences and recollections of what they have done and found to have worked. This is a good way to develop a more all round apporach, to what some people you may come across in the future, feel think or can do, when you work with them.
That's what I tried to do with another member Duilya, when she said she had issues with Squats and Lunges, relating to her Fibromylagia. I assessed what she said and concluded her feelings about them were more mental than actually physical, otherwise I would have tried to find alternatives.
Unless someone like that vehmently said they woudln't do them and it was definitely a physical sensation, they knew could be worsened by doing weights, then some other options would have to be sought.
I personally don't want to see two people, coming close to something tetchy, but I am very happy to see that both of you reached a diplomatic conclusion.
I would respectfully suggest though Bonnie, that regardless of what you learn, consideration of the experiences and differences in other peoples bodies, would be a prudent thing, because it will make you a slightly more objective and progressive trainer and it will allow you to broaden your scope a little more, if you allow yourself to be a little more flexible in your approach to others

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I just wanted to reiterate to you and Allison, that I am proud of you both for all your achievements and proud of being part of a site that you both share. You both are a pair of exceptional Ladies, and I know that there is a great admiration and mutual respect between you both and I am sure that it will continue to be the case.
I wish both of you good luck in your respective goals and thank you both again, for the wonderful kindness and humanity you have both shown here since you started. This site has never failed to benefit from it and I know it won't in the future.
You are a wonderful person Bonnie, with beautiful physical results and a great prospect as a trainer, because you have a great Heart, but keep trying to find that balance, so that your Head doesn't necessarily become too dominant.
I'm sure you appreciate the sentiment meant by that comment

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Keep on pushing and keep on learning. You ARE doing great misses and I am proud of you and I want you to succeed in your goals. You are such a caring and oftne compassionate Lady and it will be a big asset in your future. Use your knowledge and humanity wisely and don't be afraid to be wrong or make mistakes, but use your years and maturity as well, to be what you would wish to be as a trainer and what the "individual", would wish you to be.
You've done so well in the past year alone, to grow, physically, mentally and educationally and you WILL be a great trainer soon enough. Believe and don't ever stop learning when the chance for the individual to teach you comes up

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GOOD LUCK again. My belief is with you as are my best wishes

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