Rest intervals for heavier leg work in the 4-8 rep range can be 2-4 minutes, while rest intervals for moderate weight/rep ranges (8-15 reps) are typically 60-90 seconds.

“And longer rest between sets, anywhere from two minutes to maybe even four minutes if it's really heavy leg work. And then for the next month, switch to repetition range that's closer to 8 to 12, maybe even 15 repetitions per set, but do fewer sets overall, so maybe just two to three sets per exercise. Again, just two exercises per muscle group typically. And shorten the rest between sets so that it's more in the 90 second, maybe even as short as 60 second rest between sets, but typically 90 seconds to about two minutes or two and a half minutes.”