I am a 51 guy who was not fit a year ago.  I started with the basic program, and stuck with it every other day for about a month to acclimate to the TRX.  Then I transitioned into the advanced work out and just started tweaking and adding things I saw on this forum and youtube.  I have never been hurt, but occasionally ...

 Shouldn't the one year warranty be good for a year?   I have used my TRX heavily (every other day) for over a year, and my wife has been using a set for the last few months.  I couldn't imagine having the problem you are experiencing on one unit, let alone five out of ten!  Perhaps someone using them is inadvertantly ...

 Ada, I hope I didn't offend you with my reference to the doorknob pulley that was around 30-40 years ago, and probably put together in someones garage and sold via the back pages of a comic book! It was a silly device with no real functional value, sold to dopes like me who actually believed we would look like Charles Atlas while ...

 Please accept apologies for the obvious (and cheap) sexist comment in my prior post.   Larry

 Gosh, I love it when girls in bikinis talk about knots and stuff!   BTW, that looks like the pulleys they sold in the 70's that hooked onto your doorknob- you would lie on your back and bicycle!  The pulley got so hot you couldn't touch it!   Larry

 I started using my TRX at the gyn (TenXSPA in Canton Mass) about a year ago.  Same experience, some odd looks, very few asked about it.  Now the Gym is putting in a rack and has purchased a bunch of TRX straps.  Classes are going to start soon!  I wonder if I could get a commission?   Larry

 On St. John, USVI Hopefully, the picture shows up!    

 I do my suspended crunches, atomic pushups pikes and oblique work with my hands on an upside down bosu. 

 Go to the nearest EMS and buy an oval caribiner from their climbing section- $6.50.  I replaced mine as the EMS biners are stronger anyway!