All compound quadriceps exercises work the hamstrings as well to a certain extent, but some direct hamstring work is still required if you want to maximize their development. (whatreallybuildsmuscle.com)
In this study, 72 male athletes, age 20 to 50, took Wobenzym — a combination of bromelain, papain, pancreatin, and trypsin — or a placebo 72 hours before and 72 hours after a day of exhausting quadriceps exercises designed to damage muscle. (amazon.com)
Note: The table below only includes direct quadriceps exercises. (kingofthegym.com)