@fish3rofm3n You need higher intensity. Maybe pistol squats and lunges with dumbbells. But for serious leg mass you need squats, leg presses, leg extensions etc.
@werby There are some people who have a genetic ability to basically not accumulate lactic acid in any meaningful amount. I suspect a lot of the top endurance athletes who do crazy shit like this have that variant. This is not something you can simply train for
@nogueira527 Labdoor is decent
I get my whey from Canadian protein. Each batch has a custom 3rd party lab test result available showing purity and contaminant levels including heavy metals