Every now and again I hear people make comments such as "you shouldn't lift heavy weights, it's so bad for you and will hurt your back" or "don't do those jumping workouts, they're terrible for your knees and ankles."
Well, from the sound of it, people make these comments either from personal experience or from hearsay. Regardless, neither is good enough! It's like sharing misguided information or incomplete truths, which of course is in no way empowering to you or the other person you're sharing with. So keep this in mind next time you share fitness advice...
Any exercise can be terrible for you if you do not execute with proper form; if you do not know the true mechanics; or if you do not perform the pre and post workout routine. So I suggest you study or ask people who actually know what they're doing.
Let's use the negative comment about jumping as an example: There are specific techniques in the way you jump and the way you land that can keep you safe. If you do not know those techniques well, you will eventually experience injuries.
Plus, if you don't have an aerobic base to begin with, and you just go ahead and perform the moves like you're invincible, then you can certainly expect injuries. Furthermore, if you have weak knees/ankles or an injury from the past that you did not properly attend to first, then you can also expect injuries.
So before sharing any misguided conclusions, find out what it is that you may be missing, and what you need to work on. It is not only up to the workouts to improve you, it is also up to you to improve on your workouts.
Be patient when working out. Always learn to start slow and focus on proper form/technique and accuracy before you focus on speed, power or intensity.