agreed, up-downs / hit-its = the worst. i hated those at every level. we usually did them in sets of anywhere from 10-50 so 100-200 per day sounds about right.
as much as i hated them, i respected up-downs as a tried and true method of conditioning. they helped improve, strengthen, test and measure ones quickness, flexibility, explosion, desire, work ethic, cardio, strength, etc (all to varying degrees of course) – and in terms of putting out and suffering together as a unit, position group or team, i cant think of many better methods.
as i grew and starting lifting and doing all manner of S&C, i came to despise other exercises for different reasons – i really hated power cleans in college and im sure they contributed to my current joint problems as much as any other activity. cleans and squats and the like are more lifting-oriented but in terms of conditioning work, its tough to top up-downs.
i actually didnt mind resistance running (chutes, bands, sleds, etc) as much as most of my teammates, nor did i dislike the standard hill running / incline conditioning (usually until vomiting) as much as most. but up-downs / hit-its, forget about it! theyre the worst.
its only been like 10 years but i still vividly recall our S&C coaches blowing their damn whistles and demanding what seemed like endless up-downs (the process only lengthened by our mouthier teammates bitching).
so yeah, up-downs are a classic and theyre certainly a great way to condition and test while also bonding a unit, at any level – but they suck