One of those stories...
After a series of questions, tests and so on, I made the mistake of revealing to the doctor that I had been practicing CrossFit for a few years. Upon explaining what CrossFit was, I could see the doctor was growing more and more unhappy. 
 
She decided to give me a "passionate lesson" on how dangerous "my sport" was and that I should stop it immediately. Lifting weights is -apparently- dead wrong and I should never lift more than 2 kilos. As far as sports goes, I should swim and avoid putting massive strain on my bones.
 
(Now, I have nothing against swimming, it has tremendous benefits, but I don't live in a pool and sometimes in real life, you do need to pick up something heavier than 2 kgs!!!) 
 
After about 15-20 min of clear examples of injures, it was my turn to change the convesation.
I  asked the doctor if she had any kids. I was in luck: she had a boy of three years and a daughter of about 5 years.
 
I asked her if she ever picked up her boy to hold him in her arms. She said yes. I asked how much her boy weights. She could see where l was going with this. After a long pause, she said: "Oh, but , that's different." 
I beg to differ. That is NOT different. 
 
What importance does it have if you pick up your child, your bag of groceries or our barbell? 
If you need to lift something up from the ground, do it in a safe way. Period. That is with a straight back, bent knees and initiate / push into your legs. It's called a deadlift. 
 
“The DEADLIFT is unrivaled in its simplicity and impact while unique in its capacity for increasing head-to-toe STRENGTH.

Regardless of whether your fitness GOALS are to “rev up” your metabolism, increase strength or LEAN body mass, DECREASE body fat, REHABILITATE your back, improve athletic PERFORMANCE, or maintain FUNCTIONAL INDEPENDENCE as a senior, the deadlift is a marked shortcut to that end.”

No exercise or regimen will protect the back from the potential injuries of sport and life of the certain ravagies of time like the DEADLIFT.”  Period.
Well said by Coach Greg Glassman in CrossFit Journal. Google it up and read the whole article. It's mindblowing.
 
Weigh training is essential fo your bones and muscles. 
 
It's time to stop being afraid of weight training and be weary of other people's advice.
Do your homework, maybe talk to a sports doctor from time to time. Have a knowledgeable coach or personal trainer. Ask questions.
 
Movement is Life. Keep on moving and yeah, lift some stuff from time to time!
See you at the Box!