In many cases, my clients are unable to perform traditional strengthening exercises for the lower body due to anterior knee pain or weakness. Beyond loading, using the time under tension principle is a great way to add strength for those who cannot squat, lunge, etc. Below are two great videos of isometric ‘go-to’ exercises that will help improve strength and functional capacity in those who are otherwise limited in their workouts.
I hope you can use these exercises or some variation of them to increase strength and overcome injury and dysfunction.