What warm up sets would I do for the Leg press and Lat pulldown?

[The Iron OX]

According to practical programming for an overweight lifter, the leg press is 3x10 and lat oull down is 3×8-10, I'm assuming those are work sets. What would the warm up be for those two exercises? Would it follow a similar format to the other lifts? Also, when you progress in the chinups from regular chinups to weighted chinups, what would the warm up sets be?

[The Iron OX]

According to starting strength it's stated that the power snatch , it looks like the lower snatch should be done in sets of 2. How would you program the power snatch for warm up and work sets?

[Hayden-William Courtland]

You can follow the similar general structure to warm-up lat pull-downs with a set of 5, 3, etc. Remember the principle is that you want to prepare for the work sets without tiring yourself out. For the Snatch you can stay in the 1-3 rep range for all the warm-ups and just progress the weight a bit to build to your work set weight.

[The Iron OX]

Thank you