I've also noticed a great increase in work capacity, and find myself wanting to stay in the gym longer and longer to the point where I have to force myself to leave. (biotest.t-nation.com)
They're great for conditioning and increasing work capacity (being able to do more training without compromising recovery). (neatstrength.com)
The movement is perfect for developing the similar work capacity of striking on an opponent in intermittent burst through the duration of a fight round. (brandonricheyfitness.com)