weights in backpack?? (15 year old)

[N1clc]

Hi, I was reading a previous thread on weighted clothes like 20lb vests and I thought if I could put 2 15lb dumbbells into my backpack for school and like walk around with them during school and stuff...Smart or Stupid? I'm hoping that this will have a similar effect as weighted clothing.. or will it just make me tilt backwards and hurt my back.

I'm 15 years old
Height... 5'7 I think
Weight - 145-155lb

I can post additional info. if needed, any responses will be appreciated.

 

[Jake 85]

What are you trying to acomplish here, besides putting unneccesary stress on your joints? Backpacks are for books, not weights.

 

[Woodt]

Would be useless. Weighted tops spread the weight over your body with the objective of strengthening you muscular endurance and also getting you used to a heavier weight so when you take it off your faster. Boxing for example. A backpack just pulls back and causes you back problems.