By A Mystery Man Writer
Two of the most famous exercises to increase mass muscles, leg extensions and pull-ups on the bar, to be performed correctly need some tricks to avoid problems with the muscle chains involved.
Injury Prevention: Stay Safe With Pull Up Exercises
Chin-Ups Are a Challenge—Here's How to Do Them
How to Prevent Common Exercise Injuries - The New York Times
How to Use Leg Press, Curl, and Lift Machines
What's a Good Weight to Leg Press - How Much Weight?
Yes, The Chin-Up & Pull-Up Are Different. And Yes, It Matters
How to Do Pullups with Proper Form: Full Guide
Leg Extensions: Dangerous for your knees or great rehab exercise?
Injury Prevention 101: The Quads Exercises
The Only Guide You'll Need for Perfect Pull-Ups (with Game-Changer