Start with a few reps at a very high weight, switch down and do more reps, and keep going by doing a ton of reps at a low weight with tired arms. (flexmastergeneral.com)
You know already that you have signed up for tired arms, painful back and hours in the water. (epicgapyear.com)
It is very important to get your dog something that would keep it active without tiring your arm muscles. (usbones.com)