Notice how your group instructors start off an exercise by explaining the correct form? This is because having correct form is the number one best thing you can do to exercise effectively and safely. The position of your body, posture, and how a joint should bend is almost as important as the exercise itself. It's always better to do fewer reps with better form than more reps with poor form.
Correct form allows the user to work-out the right muscle groups to build strength and ensuring you are getting the workout you signed up for. Take gluteal kick-backs as an example. This exercise is meant to extend the hips so that it targets your butt. Many people kick too much from their knees as opposed to swinging their hips. In this case, they are taking less tension off the gluts and transferring it to their quads. This means you are ineffectively working out your butt (because there is less weight) and ineffectively working out your legs (because this exercise was not meant for the quads). That is why correct form is crucial if you want results.
Correct form also exist to protect you. Doing an exercise with incorrect form can increase your chance for injury. For example, for a squat your knees should not go past your toes and your chest should be facing in front of you as opposed to facing the ground. This prevents strain on your knees by preventing ligament and tendon strain and back pain. If you start to notice pain in your joints, it might be because you are using incorrect form. Different from the aches of a good workout out, this kind of pain can lead to long-term pain and injury.
We hope this was helpful to you! Delta Life Fitness wants to support your mental and physical wellbeing during this global health crisis and we hope that our content has given your day just a little bit more joy. Stay safe and stay healthy!